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{{Status|~99% of Extruder VBOM ~99% of Winder VBOM ~20% of master index|Filament Winder VBOM|Confusion in existing documentation/Time Available}}
{{Status| more D3D Mini PVC assembly | quick couple | time}}
'''Logs of others'''
'''General links''' [[Critical Path]] [[Roadmap]] [https://www.mediawiki.org/wiki/Help:Formatting mediawiki formatting help] [[Development Team Log]] [https://hangouts.google.com/hangouts/_/event/cfvdskolaipjgki95aoufjf3l50?hl=en&authuser=0 OSE Hangout] [https://meet.jit.si/OpenSourceEcology OSE Jitsi Meet] '''Abe's Links'''  
<table>
[https://drive.google.com/open?id=0B_pyTit4JelUWVJWTlRPTEs2WlE Abe's OSE Google Drive Folder]
<tr>
[https://www.google.com/calendar/embed?src=YnBwYWdybmM2dGkxMGczZXFubm9uYTRlc2dAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ Abe's OSE Google Calendar]
  <td>'''Log'''</td>
[https://www.youtube.com/channel/UCaSkjoHA0rn97JQUQJwa2pg Abe's YouTube channel]  
  <td>[[AbeAnd_Log]]</td>
 
  <td>[[Brian Log]]</td>
<html><iframe width="520" height="260" src="https://osedev.org/wiki/AbeAnderson"></iframe></html>   <html><iframe src="https://docs.google.com/presentation/d/e/2PACX-1vQLr2edgs01suCh5T4pH7qDdgnkPE6obdNdFLpdTz5ZzxQCYOeDRVdtkLcr6hTFrcrx4k23-zvEmNms/embed?start=false&loop=false&delayms=3000" frameborder="0" width="520" height="260" align=right allowfullscreen="true" mozallowfullscreen="true" webkitallowfullscreen="true"></iframe></html>  
  <td>[[Chas_log]]</td>
 
  <td>[[Cedric Log]]</td>
<div style="text-align: right;"> [https://docs.google.com/presentation/d/1xuGsPGhbtTUaespbW9WlWgM1uy4IAv6TmEuJy8VVH-c/edit#slide=id.g543bf89674_0_0 edit] </div>
  <td>[[Dorkmo Log]]</td>
 
  <td>[[Emmanouil Log]]</td>
'''Current Logs'''
  <td>[[Frankm99 Log]]</td>
 
  <td>[[Gregory_Log]]</td>
=Sat Oct 12, 2019=
  <td>[[Hart Log]]</td>
 
  <td>[[Jean-Baptiste Log]]</td>
reviewed WebGL tutorials. Trying to decide what to CAD next given the difficulties of what is immediately good enough while trying to align that with good future design goals so there to create forward momentum and reduce double work.
  <td>[[Jonathan Log]]</td>
 
  <td>[[Jose Urra Log]]</td>
Created new gitlab project repos.
  <td>[[Lego Log]]</td>
 
  <td>[[Marcin Log]]</td>
https://gitlab.com/Abe_Anderson/D3D-Simple-Extruder
  <td>[[Michael Log]]</td>
 
  <td>[[Richard Log]]</td>
https://gitlab.com/Abe_Anderson/Kinematic-Mount
  <td>[[Roberto Log]]</td>
 
  <td>[[Shane Log]]</td>
I've considered many possible ideas for kinematic style mounts that could be automated, but I don't think any have been viable yet. I need to look at more mechanical examples, hand draw some ideas and just try some experimental CAD. The round head bolts seem passable, but finding other generic bolts the right size may not always be easy. The shape of the plastic parts has to be complex to accommodate multiple features. A latching mechanism needs to work by moving along multiple axes and attachment of levers is not easy either.
</tr>
 
<tr>
=Thurs Oct 10, 2019=
  <td>'''Youtube uploads'''</td>
 
  <td> [https://www.youtube.com/channel/UCaSkjoHA0rn97JQUQJwa2pg/videos AbeAnd]</td>
Meeting. I reviewed emails and doc changes. It sounds like a lot of good progress on projects, but not a lot of uploaded files yet.
  <td> [https://www.youtube.com/user/brianhullart/videos?shelf_id=0&view=0&sort=dd Brian]</td>
 
  <td> [https://www.youtube.com/channel/UCZHDp-GwvQmXQMUEXtyK9jQ/videos?view=0&sort=dd&shelf_id=0 Chas]</td>
=Sat Oct 5, 2019=
  <td>Cedric</td>
 
  <td>Dorkmo</td>
more email with Chris & William. I exported and uploaded STL's for the [[Simple 3D Printer Extruder]] PLA parts.
  <td> [https://www.youtube.com/user/polemidis/videos?shelf_id=0&view=0&sort=dd Emmanouil]</td>
 
  <td> [https://www.youtube.com/channel/UCTGYSeF8yPHelUgN_w52oxQ Frankm99]</td>
I added links diagrams to the STEAM doc and did lots of brainstorming about easy printable possibly kinematic tool mount.
  <td> [https://youtu.be/KVqbdWqx5Yc Gregory]</td>
 
  <td>Hart</td>
https://docs.google.com/presentation/d/1pDEjvuqPt6b8iXULDGtRTPE8YsbaTSFLy1pe-paaOSU/edit#slide=id.g64a18b2cd3_2_0
  <td> [https://www.youtube.com/user/jvervaeck/videos Jean-Baptiste]</td>
 
  <td> [https://www.youtube.com/channel/UChcLEKrY6Z4I_K0TLRJ2hUQ/videos?shelf_id=0&view=0&sort=dd Jonathan]</td>
Also thinking about tool changing. Hoping there is some X,Y,Z dance the machine could do with a tool to release and latch it into a mount without extra motors/servos etc. A tool mount that could do that maybe complex would it might beat having extra motors easy if it is elegant and has great MTBF. No living hinges or flimsy push-push latches. Maybe it needs metal springs. I wonder if the mount mechanisms could actuate with 2-3 axes of motion if needed.
  <td> [https://www.youtube.com/channel/UC8eGFO_xemILyJVhifEaG2g/videos?sort=dd&view=0&shelf_id=0 Jose Urra]</td>
 
  <td> [https://www.youtube.com/channel/UCOiU1Bqb7foAQWYhk8cnAcQ/videos?sort=dd&shelf_id=0&view=0 Lego]</td>
=Fri Oct 4, 2019=
  <td> [https://www.youtube.com/user/marcinose/videos Marcin]</td>
 
  <td> [https://www.youtube.com/channel/UCXdy_PAgBlnvGLTaUdcjs6Q/videos?view=0&sort=dd&shelf_id=0 Michael]</td>
I responded to an email from Chris about the simple extruder. More thought and reading is needed on the quick coupling concepts...
  <td>Richard </td>
 
  <td> [https://www.youtube.com/channel/UCGUHCBrP3OjgHbAu1IyJmpw/videos?sort=dd&view=0&shelf_id=0 Roberto]</td>
I updated the D3D v18.10 BOM with 3/8" nuts and resolved the comments. I selected what I thought was the most universally useful for the price. https://docs.google.com/spreadsheets/d/1eCYxQkOZ6GKS5zkTIKQneVsXDnhAc99Twsm2upWlFn8/edit#gid=0
  <td>Shane</td>
 
Reading more about kinematic coupling and I looked up William's extruder work from today as well. I wonder how accurate 3d printed plastic couplings could be if bolted together. That appears to work for camera mounts, but I question the repeat accuracy. I also wonder about embedding 3 nut catchers in the carriage in such a way they would be compressed and not move much post assembly. Adding the requirement of complex off the shelf metal parts like balls and grooves would likely add cost. In the long run, they could be milled, but the accuracy requirements are likely higher than what will be achieved soon.
 
=Sun Sep 29, 2019=
 
Doing a little more research on kinematic coupling and tool changers.
Immediately the need is just for a quick couple, but it would be nice if it was at least partially scalable for future tool changing needs.


</tr>
I think there are ways to make a dock that effectively catches and releases tools without extra servo or stepper motors by using the force of moving the head in/out of the dock. I also think 3D printed plastic parts might be accurate enough for most printers if the design is good enough. I'm not familiar enough with the mechanics of kinematic coupling yet.
<tr>
  <td>'''Shared folder'''</td>
  <td>[https://drive.google.com/open?id=0B_pyTit4JelUWVJWTlRPTEs2WlE AbeAnd]</td>
  <td>Brian</td>
  <td>Chas</td>
  <td>Cedric</td>
  <td>[https://drive.google.com/drive/folders/0BwxMMqGvwTM-OWIzZGRmMGItNWIwMC00MGZhLTkyNTktNWM5YzZlNTY5NGUx Dorkmo]</td>
  <td>Emmanouil</td>
  <td>Frank </td>
  <td>Gregory </td>
  <td>Hart</td>
  <td>Jean-Baptiste</td>
  <td>Jonathan</td>
  <td>Jose Urra</td>
  <td>Lego</td>
  <td>Marcin</td>
  <td>Michael </td>
  <td>Richard</td>
  <td>Roberto</td>
  <td>Shane</td>
</tr>
             
</table>


'''General links'''  [[Critical Path]] [[Roadmap]] [[HR]] [https://www.mediawiki.org/wiki/Help:Formatting mediawiki formatting help]




[https://drive.google.com/open?id=0B_pyTit4JelUWVJWTlRPTEs2WlE Abe's OSE Google Drive Folder]
=Sat Sep 28, 2019=
[https://www.google.com/calendar/embed?src=YnBwYWdybmM2dGkxMGczZXFubm9uYTRlc2dAZ3JvdXAuY2FsZW5kYXIuZ29vZ2xlLmNvbQ Abe's OSE Google Calendar]
 
[https://www.youtube.com/channel/UCaSkjoHA0rn97JQUQJwa2pg Abe's YouTube channel]
emails about added links, simple extruder, and the printer manual docs.
Syncthing ID: IRALYQS-GZKNGUO-LNQNXWL-ESKLSLZ-GIENKHQ-AVCYDQ5-QNTETCG-42SNFQ7
 
Reviewed more STEAM Camp docs and made requests on the gdocs for the printer manual to fix the missing nuts.
 
Added more links and better organized some wiki pages since the previous ones I made were fairly bare. Adding one base starting wiki page for each project would help the new team get started on the wiki quicker and I see new templates using wiki code.
 
I updated PVC assembly with 10mm nuts and adjusted the heat bed relative to them to compensate for the ~0.5mm difference of 3/8" nuts assuming that is a better fit. The JB Weld method well always cause some variation. I think the heat break on the simple extruder could be shorter yet, but plenty of feedback is needed on the simple extruder assembly before assuming anything.
 
https://gitlab.com/Abe_Anderson/d3d-mini-pvc
 
I think it would still be best to migrate the simple extruder and assembly to its own repo or something similar.
 
=Fri Sep 27, 2019=
 
I linked a few things in the STEAM Camp doc and added links to connect pages better on the wiki.
 
=Thurs Sep 26, 2019=
 
I've been reviewing the STEAM Camp material and thinking about critical feedback I see in some of the interviews. So I made some notes on collaboration efficiency in my general working doc.
 
I've also been thinking about a better tool head attachment. Even for the PVC frame. It probably isn't stiff enough for heavier milling, but tool head quick attaches and even automated tool changers are important for making the D3D more of a small universal micro-factory CNC machine. One issue I can see is mounting to the U-Axis carriage currently requires mounting around it on both sides. The other open-source solutions [[kinematic coupling]] with three points and this seems ideal. Given there are already open-source designs by lulzbot, e3d, and others we should be able to adapt something without reinventing the wheel. Maybe even just pick and existing standard. The question is how best to mount it to the carriage. If it is feasible I can see reasons to add some bolt holes to the carriage if it makes it more universal it is a win.
 
https://reprap.org/forum/read.php?1,622267,622362
 
https://en.wikipedia.org/wiki/Kinematic_coupling
 
http://download.lulzbot.com/
 
 
[[kinematic coupling]]
 
[[D3D tool changers]]
 
=Mon Sep 23, 2019=
 
I made comments to multiple D3D files about the lack of M10 nuts required to fit over the 8mm rods for JB welding the heat bed as shown in the printer manual.
 
Looking at other printer BOM's...
 
=Sun Sep 22, 2019=
 
I responded to an email from Marcin about the Simple Extruder assembly and STEAM camps.
 
uploaded photo of the simple extruder assembly.
 
Working out more PVC assembly details with the heat bed mounting (JB Welded nuts). I recently changed most of my Freecad installs over to the app image packages and just had to reinstall the fastener WB for some reason.
 
Another relevant side topic I researched recently is battery packs. We have a retired nomadic friend that visits the farm in winter who is science-oriented and recently shared a video of a battery pack build and said he would like to try a build this winter. His goal is to design a small solar and battery pack system for periodic portable cooking because the cost is now low enough it might save him money over gas tanks. I'm skeptical of it, but I learned quite a bit from him before about such topics so I will document anything that comes of it. https://docs.google.com/presentation/d/1iUEES6Pqmc6Fz3nmrmUMhBxXQI_egm7yCMXfZ0wrr-0/edit#slide=id.p
 
The printer manual appears to reference and BOM that does not include large enough nuts to go over the 8mm rods. It looks like it needs to be 4 x M10 nuts. Further investigation is needed.
 
https://docs.google.com/presentation/d/1LRL6PQtWm0LT6j6YNjLNjDAdbKkd3TmO8_aOBdfskhI/edit#slide=id.g41779cb437_4_98
 
=Sun Sep 1, 2019=
 
edited meeting doc again and added reevaluation of meetings to the agenda to see if we can get more attendees at a different time if needed. The meetings tend to be more broad brainstorming that veers off focus some, but individual progress reports are useful for the big picture. I think we need to create more jitsi meets as needed in case of overlapping meetings. https://meet.jit.si/OSE_Dev_Team_Meeting
 
https://docs.google.com/presentation/d/1RvglDNOgP5idzJ0ZvKq1EktuatM23rJ4pMLI5degjYo/edit#slide=id.g1861bf60d5_0_6
 
I'm trying to adjust the filament path angle more, but having trouble rotating or attaching the sketch to a datum plane correctly.
 
I added the nema 17 motor mounting bracket. I think the simple extruder should be moved and restructured under it's own gitlab project, but the gitlab site is glitching at the moment.
 
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware
 
=Sat Aug 31, 2019=
 
I made repeated small changes to the simple extruder parts to find ideal alignment of the plastic parts, bolt holes and filament path. At first I expected to leave the bolt points alone, but after fixing the symmetry in the filament path and experimenting with the angle/spring tension it was clear the bolt point on the tension arm didn't look right. It is a concern to experiment with the bolt points because of post-print shrinkage. General experimentation done on the original may effectively need to be redone since the CAD is redrawn from measurements anyway. I made notes on a possible mod to the spring design, but making it more compact looks like it has tight tolerances and will require a lot of experimentation with prints so that is something for later.
 
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder
 
 
 
=Tues Aug 27, 2019=
 
made adjustments to simple extruder including the plastic parts. I'm trying not to change most of the original metrics since they appear to be accurate caliper measurements, but somethings seem way off around the filament path. So I'm centering some holes symmetrically and I added measurements in spreadsheets based on the NEMA17 standard.
 
I added a "spring" for more visuals. I think I can use datum plants and lines to help find the right positions for the filament holes. I increased thickness of the spring base bracket as well. It would be nice to countersink a standard hex socket M3 instead of the countersunk head style screw. It also seems the bolt in the spring could be eliminated, but that may require some prints to refine the fit due to shrinkage etc. I'm also thinking some of the CAD needs to be bigger due to measurements of the original PLA due to shrinkage. Changing the angle of the bearing bracket only made it look worse.
 
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder
 
=Mon Aug 26, 2019=
 
I keep finding more slight alignment issues. Looking back at the recent photos there appear to be a known issues. Most of these details will never be that perfect when cut by hand and there must be enough slop in the PLA parts they bolt up anyway, but it is nice to get the CAD close to check all the measurements. The filament path definitely looks like some updates would help feed.
 
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder


[[Volunteer Timesheet]] [https://hangouts.google.com/hangouts/_/event/cfvdskolaipjgki95aoufjf3l50?hl=en&authuser=0 OSE Hangout] [https://meet.jit.si/OpenSourceEcology OSE Jitsi Meet]
=Sat Aug 24, 2019=


=Thurs Jun 8, 2017=
Reworking at the simple extruder mounting bracket assembly. https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder


Meeting prep.
The current simple mounting bracketing style is similar to the e3d bracket. In photos the original looks like a black metal angle bracket. The new printed version that looks possibly warped a little. So, something in between would be better. Also, because it mounts between the base block and the motor there may be thermal issues. This seems likely given the melted appearance of the spring bracket in photos. To prevent possible warping and given the need to push the temps up for materials other than PLA some insulating material like PTFE adhesive tape may help. PTFE tape appears to be used on the threads in the original photos already. I suppose a longer heat break could help as well, but it already looks to long in the current CAD. For flex filament I was assuming a custom Al milled design would be difficult, but for testing, I wonder if just using a longer heat break threaded up through the base block and ground on a wheel to shape would be good enough.


=Tues Aug 6, 2019=


=Wed Jun 7, 2017=
created cad with spreadsheet for nema motors with some mounting details for adding to the simple extruder assembly.


Reviewing communications and docs and starting organizing of master index sheet.
I only entered data in the spreadsheet for nema 17, but it could probably be designed with more automated selection options depending on how much more hidden complexity is available in the freecad spreadsheet WB.


https://docs.google.com/spreadsheets/d/1vulgD585CFuVdSojXhBdnb3FNU0C-Aaj3lI7I6qTQvg/edit#gid=0
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder


2 hrs
=Sun Jul 28, 2019=


=Sun Jun 4, 2017=
tested simple extruder assembly and adjusted simple extruder metal part dimensions.


reviewing network posts, logs, templates and considering master index structure for ease of copying redundant data between other sheets like the BOM.
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder


https://docs.google.com/spreadsheets/d/1zx11MIjZEl3VLHnTPdmyxgsoCo1x9pdFlFn7mgWnRsM/edit?ts=59325ee4#gid=1
=Fri Jul 26, 2019=


catching up some details and lack of links left in the VBOM. Looking for redundancies in the two sections. Looking over STL and image files in zips with respect to the wiki part library.
I think I resolved the freecad error with the nozzle file. I may understand it partly. <pre>The error message is: Object can only be in a single GeoFeatureGroup</pre> I rebuilt the pads from the sketches, but first had to remove the body and part containers and re-add everything in the right order and place. I tried detaching the hex sketch and reattaching it, which kept giving the same error primarily because I kept clicking the wrong function. I was mistakenly clicking the negative loft button instead of additive. I explored the new additive and subtractive functions before with interesting results but frequently forget.


Further reading of logs and gdocs therein for pertinent info in new tutorials and guides. Looking and BOM and templates to optimize master index. https://docs.google.com/spreadsheets/d/1vulgD585CFuVdSojXhBdnb3FNU0C-Aaj3lI7I6qTQvg/edit#gid=0
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/Simple%20Extruder/nozzle.FCStd


=Wed Jul 24, 2019=


3 hrs.
I went to finish the nozzle and the file is somewhat corrupted. Using the compound function may have caused the problem. That workflow did not look good so I tried to delete it to do a fusion instead and that is when problems started. The part design WB then detected issues and started suggesting migration to the new part WB. I tried auto migration and other ways. One fix suggests separate part bodies for each pad. Maybe that is a more correct workflow in some cases, but I think using different functions from other WB's including the loft changes the tip or creates a separate feature without a body by default causing confusion. I may also have attempted moving different features to the body or part containers at different times by dragging them that caused issues as well. I need to understand the suggested workflow for bodies and part containers better. I may need to delete the pads and recreate them by reattaching the sketches. Or it may be faster to try redoing it in a different order.


=Fri Jun 2, 2017=
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/Simple%20Extruder/nozzle-glitch.FCStd


Reviewed work logs & network.
I also looked at and experimented with the heat bed size, the printable area and how it is defined in Marlin.


Formatting and assembling Master Index for Extruder based off D3D wiki page and docs there. I also recall some discussion on the structure of spreadsheet BOM's in a previous video probably a meeting I may try to find for reference.
I also added some info to [[Analysis of PLM Software Conflict Resolution]]. Generally improving the collaboration software abilities seems important, but with few contributors, it remains a lower priority. However, this is somewhat a paradox since ease of use would encourage more users to engage in prototype development.


https://docs.google.com/spreadsheets/d/1vulgD585CFuVdSojXhBdnb3FNU0C-Aaj3lI7I6qTQvg/edit#gid=0
=Tue Jul 23, 2019=


=Wed May 31, 2017=
added simple extruder files to https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder


Downloaded STEP file from McMaster Carr examined and experimented with simplifying it in FreeCAD.
I'm guessing the dimensions from the photos & using spreadsheets so these can be changed easily later.
Saved original as freecad file uploaded here:


[[File:5-8 in bronze bushing.fcstd]]
I got most of the spreadsheets & CAD done for the metal parts of the simple extruder. The sheet values are approximate on a few things, but I tweaked them to look close.


Added to Parts Library [[Lyman_Filament_Extruder_Part_Library#Extruder_Barrel_.2B_Auger_.2B_Flange]]
The spreadsheets and values are surprisingly easy to edit. I wasn't really able to break them. If you move alias cells it clears them in the sheet, but not in the CAD values, so it is fairly easy to fix. It is time-consuming with all the data entry but looks worth it in the long run.


Noticed McMaster-Carr CAD Discalimer https://www.mcmaster.com/help/drawingsandmodels.asp#disclaimer
=Sat Jul 20, 2019=


Probably not an issue for purchasing parts, but need may need to label such parts so as to not break this in future if attempts are made to make parts.
I see the continuing work on the OSE Simple Extruder. https://photos.app.goo.gl/fWUX8ynAdqcn6Fvs6 https://drive.google.com/drive/folders/17BLyvyk1EbrMOhkCfeSwByAq86SemSLX
https://wiki.opensourceecology.org/wiki/William_Neal_Log#Thursday_June_27


=Tues May 30, 2017=
While there is a lot of flexibility in the PVC and clamp design one of the less exact remaining details is the mounting if the extruder and its position relative to the bed. A mod of the E3D bracket should work fine, but a better quicker modular system would be useful. I'm curious to see what open solutions lulzbot uses.


Received new email from Mr. Lyman about CAD files.
Lulzbot has cat guards, which must be open source. This seems similar to an "enclosure". Reprap forums suggested while it may be legal for many to build enclosures individually it should not be discussed due to the yet unexpired patents.


Joined CNC torch and extruder filament winder meeting.
In order to run Printers indoors or outdoors, animal guards would be useful. https://ohai.lulzbot.com/project/cat_guard/accessories/


Considered strategy for importing CAD files, while waiting for bulk of files from Lyman.
Moved the extruder mount underneath the carriage this gets it much close to the bed. The Simple extruder might be close to long enough. However, I'm uncertain about wiring and cable chain logistics.


=Fri Jul 19, 2019=


=Mon May 29, 2017=
added more comments on soil mixer brainstorming.
https://docs.google.com/presentation/d/1RJg3LyG_jI_gmUwBFuwNjbAMVUmuYUo7uQVjLDV9Qiw/edit#slide=id.g5dc8542d49_11_96


meeting prep.
jitsi conference connection problems.


adding plastic 3D printed parts section to BOM and sections in wiki/part gallery to note printing tests and recommended parameters. Tested print settings could also be individually listed in STL file pages.
https://docs.google.com/spreadsheets/d/1lgtDWFMfNn7fEidPdlap_8PqSDXJFyM_AKvdjq6KSWs/edit#gid=0


=Thurs Jul 18, 2019=


=Sat May 27, 2017=
reviewed more CEB soil mixer info and returned Aidan's email.
searched links for remaining VBOM parts on the winder.
Reviewed network and wiki posts.
1 hr


=Fri May 26, 2017=
=Wed Jul 17, 2019=


checked network, wiki, linking parts, trying to understand typos and errors in PDF BOM (line 13 duplicate and not shown in diagrams).
got email from Aiden yesterday whom I missed in the jitsi meet. Added some scribblings to the soil mixer doc. https://docs.google.com/presentation/d/1RJg3LyG_jI_gmUwBFuwNjbAMVUmuYUo7uQVjLDV9Qiw/edit#slide=id.g5dc8542d49_4_0


=Wed May 24, 2017=
It is a little hard to visualize in 3d so far. The height logistics of loading design over a press as well as the feeding and exiting of materials seems difficult. Rotating it 45 deg is a half solution. Maybe a more complex drawer design would be worth considering. I can imagine the drawer system will need cleaning due to cement. I think the cement access will need a cover to keep water out in case that is sprayed into the soil hopper as well.


Reviewed network posts.
I like the metered/dosing concept for 1 block at a time. I think that will reduce the need for raw horsepower frequently seen on big batch mixers. A good hammermill is important to since soil types vary. With test SCEB's here I think many of the poorer higher cement content ones have chips, slight crumbliness, weakness due to poor mixing. If the clay is moist it clumps and can't mix well with sand. Here the soil is mostly silt, sand, rocks, & sandstone often on top of a hard moist clay layer 18" down or so. Even if there is enough material in some areas on location digging the right amounts and thorough mixing are a challenge. In fact, in some cases I can see it needs to be dug, then dried some then milled so it powders and mixes better.


Added links and updated VBOM.
=Tues Jul 9, 2019=


2 hrs
cleaned up meeting doc for next week. Reviewing D3D BOM's trying to decide which parts & features to drop or add.


=Tues May 23, 2017=
=Sun Jul 7, 2019=


Meeting prep.
Continued reviewing workshop info and the D3D CNC Mill CAD, which is impressive.


Sent Hugh Lyman an email about CAD files.
I see improvements all around in the workshop media. The hard part seems to be getting critical feedback from workshop participants, especially less technical people for which more feedback is needed to refine the educational media. I think the technical peoples perspective is generally it's nice to review the detailed engineering info and it is great for the average person to learn lots of STEM. But, what is most useful from the less technical persons perspective?


=Mon May 22, 2017=
At first, I was thinking a lot of the info is also geared towards more visual learners and maybe other styles need to be covered as well, but I also see the OSE Design Manuals have outlined lists even though they are in slides, so there is room to consider more of both. Obviously, the hands-on shop parts are probably everyone's favorites, but since the lectures are likely precursors to specific shop work getting everyone up to speed is helpful to the swarm effect. As usual to refine all that practically requires a whole other team.


Meeting Preparation.
Also getting part counts into https://docs.google.com/spreadsheets/d/1lgtDWFMfNn7fEidPdlap_8PqSDXJFyM_AKvdjq6KSWs/edit#gid=0


Work summary:


Monday, post meeting I considered ways to try better preparing for the next meeting.
=Fri Jul 5, 2019=
Common concerns to improve are general preparedness, speed and conciseness, communications audio quality due to the chaotic nature of internet quality, and conveying pertinent information to the group effectively.
Methods to address these are trying different log organization, flexibility in meetings including different methods of scrum stand-up submission, and taking more time to prepare pertinent work summaries.
I continued searching for links and arranging the Extruder VBOM. Commenting on discrepancies in the original Lyman docs and potential issues with parts.


Tuesday
I listened to some videos from the workshop and glanced over the 2" U-Axis doc, but still, don't have a clear picture of many concepts. I'm surprised at the size of the CNC Mill if I'm understanding correctly it may have about a 2' working area/volume? I figured for a precise mill for small metal parts that several inches would be sufficient.
Continued considering ways to take better notes while working. Continued VBOM starting on Filament Winder.
Corrected assumptions about VRM and noted electronics spec concerns. Found a manual to PID, but it is not detailed.
Attempted recording and editing some unscripted video about gdocs use, but quality is not sufficient without more scripting and planning.


Thursday
A question: Given that much of the OSE workflow tends to bias towards visual learning styles how might the guided learning style in workshops be done to enable those of other learning styles to better understand existing visual documentation tools and apps?
Added more comments on Extruder construction I think I figured out the purpose of that are not well documented in the Lyman PDF.
Made more notes about extruder operation.


Friday
Individuals can choose different tasks that suit their style, but we need people to learn freecad from whatever approach suits them. There were other requests for more vocabulary definitions and a glossary was a suggested solution that would be ideal. There are also existing wiki's and docs for apps like freecad, for which more links could be provided and reviewed in the lectures.


Continued VBOM on Filament extruder
Updated my working doc (top right) with a pros/cons list of using another spreadsheet to speed swarm work of part spec collection prior to CAD drawings.
I think it might be faster in ways, but I'm uncertain about the overall flow and hangups. Current methods in design sprints and workshops are to lookup the links in the BOM and find specs for parts you pick. There is some double work looking up interfacing parts specs even in a workshop where individuals can directly communicate it requires more time and interruptions. This should leave more time for needed for discussion of clearances/tolerances and understanding interactions between parts.


Saturday
=Thurs Jul 4, 2019=


Arranging Winder VBOM noted discrepancies in Lyman PDF Docs between versions of devices, BOM list, and photo documentation.
away from my Linux workstation still without a good laptop, but I've reviewed some of the active steam camp materials. Interesting to see the development and discussion as usual.
Noted many questions and concerns about machine operation methods and certain materials functionality can only best be answered through simply building and experimenting with the machine.
I'm trying to understand the details for the [[2" Universal Axis]]. It looks like they need a number of changes to be ready for printing.


=Sat May 20, 2017=
I added a spreadsheet to [[File:2axismotorpiece.fcstd]] because I think Williams [[FreeCAD Workflow]] seems ideal for sharing consistent data values across many similar parts quickly.


Working on VBOM. Trying to find and match all parts from BOM list to images and links. Some parts appear unidentified, possibly because of changes and versions.
Maybe a gdoc sheet would be good too. It could be sectioned with values shared across parts and changed in real-time. It should be easy to copy/paste those cells to freecad sheets then there is less data entry for each person and values remain consistent. It should also reduce typos. When values are uncertain it is also easy to copy lists of needed dimensions to keep dev's on the right track and remind people what data is still missing.


3hrs
=Mon Jul 1, 2019=


I think the best way to be prepared for scrum stand-up for next week is a simple work log summary and the most important points I've discovered about the winder.
I finished cutting up the PVC sch 40 pipe a while back for the D3D PVC Mini. I'm traveling for a few days but hope to figure out how to collaborate more during the workshop.


=Fri May 19, 2017=
For the D3D PVC Mini I need to do more precise CAD of the simple extruder for which some CAD is not yet done. I think I can approximate a placeholder good enough.


Copied BOM data in and start arranging Winder VBOM.
I also need to further research the sources from existing BOM's. Jon reported issues for D3D Ohio parts and I'd like to avoid those.


1hr
I'm not far from ordering parts, but some of the little details are going to be important to verify first.


I'm glad to hear the STEAM Camp chose to do the Torch Table project. I think the priority order is Torch Table, CNC Router, Metal Printer. Because the Table has been in waiting for a while and well accelerate other projects significantly. The CNC Router is next because it can take lower precision parts and make them higher precision via subtractive work. The metal printer is relatively unknown and creates small low precision parts initially. Empirical testing is needed to find the hangups for the metal printer, but the use cases are more long term.


=Thurs May 18, 2017=


Added some notes on extruder VBOM.
=Tues Jun 18, 2019=


Considering what to put in a work summary for scrum stand-up. Likely more detailed notes and analysis of the extruder. The main point is building and testing it will be the only way to resolve all the potential questions since existing documentation is sparse.
Busier than expected with farm guests lately, but I am continuing on the D3D PVC Mini. I've cut sch 40 3/4" PVC to ~10.66" for testing. I already observe at such short lengths it is quite rigid. At 2ft it has noticeable flex under force, but infills could reduce that significantly. Vibration is harder to judge, but when supported well at both ends peices don't visibly vibrate much.


From Lyman's docs his preferred versions of the equipment lean towards manual operation. So experimentation and further documentation on how to operate the system will be needed. Such as switching on the heater on, first waiting for an alarm from the PID (I think, not a lot of documentation on PID either) then manually turning on the extruder motor.
=Fri Jun 7, 2019=


Continued work on VBOM Filament Winder Part.
added a bed holder to the assembly. It still needs a different design because of the offsets with the frame. To keep the bed holder length short it would be better to move the Z axis inside, but it also doesn't look like that will fit with the clamp.


Tried to figure out the status log template tag recommended on Dev Team page. Still a little confused about templates and categories usage.
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware


1hr
=Tues Jun 4, 2019=


=Tues May 16, 2017=
Busy with farm guests so likely to miss the meeting.


Finishing up extruder parts in VBOM. Some concerns about electrical components and wiring, especially in relation to workshop instructions, reminds me of the NASA Workmanship Standards.
Next steps trying to get good enough measurements of the simple extruder to create an assembly to help determine which way is best to orient the extruder on the X-axis.
http://hackaday.com/2016/11/03/specifications-you-should-read-the-nasa-workmanship-standards/


Also recorded some quick tips related to google docs and my VBOM work, but they need editing. Doing good video on the fly is hard. Scripts are best in lieu of significant experience, but take time so I am trying for a balance with editing magic.
=Sat Jun 1, 2019=


I also thought more about the meeting and scrum stand up. As more global members join meetings need to be more flexible due to time zones etc. so allowing pre-recorded scrum stand up and follow up discussion on the network may be the only viable solution in some circumstances. This may also help with constant intermittent network issues causing inaudible audio between different members. This varies constantly and switching software apps would likely just switch the problems around to different members.
attempted FEM in FreeCAD on rods some trouble at first, but finally succeeded on the tube as well. I'm uncertain how easy it would be to add complexity and multiple part assemblies and materials. It seems to only work well in simplicity, but part of that is technical experience as well. At first I was concerned with following tutorials closer and in the same order, but I think the errors were fixed by resets of freecad and finer mesh when needed. Attempting a realistic large scale 4ft gantry of the Universal axis may not be worth the time. I'm uncertain yet if it can model the compression and stiffness concepts.


In reviewing the meeting I noticed I made assumptions and did not have good answers to questions. It also sounded like Marcin was expecting more detailed analysis of the machine function where I had focused on just getting the VBOM parts listed and linked and only delved into functionality where necessary for part spec determination. While daily work logs on the wiki could be made a concise guide for a quick scrum stand-up presentation in some cases the everyone gets a slide model could be better.
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/FEM
Slides allow more real-time interactive collaboration. Particularly in the case where multiple people are working together on the same project using a slide to present work may be more efficient.


Overall I'd say flexibility for devs to present different types of work will be useful. A summary of work and potential dependencies may be best presented a variety of methods audio and diagrams, with live video screen sharing in hangouts or edited youtube clips with followup discussion on hangouts. Encouraging Dev team members to prepare summaries before the meeting will lead to more concise clear presentations and thinking about what it is critical to inform the rest of the team about. If documentation of work is integrated into daily workflow it will not waste time, but increase efficiency as priorities and potential hangups are constantly evaluated as work is committed.


Found manual for mypin PID, but not a lot of detailed user instructions in there.
=Tues May 28, 2019=
http://www.mypinchina.com/uploadfiles/201161494651265.pdf


3hrs
Added more notes.


=Mon May 15, 2017=
Working on CAD assembly. moving X axis alignment. Further grouping and labeling all parts and axis' as similar to exiting OSE D3D machines as possible.


preparation and meeting.


Meeting reminded how OSE is an education-focused organization and scrum standup is essentially the same for the purposes of educating other team members. I am thinking the log should be organized to document work and serve as an outline to aid in presenting a clear concise scrum standup. The team needs to know what each member is focused on especially when spread out on different tasks where the interdependencies aren't as obvious. Because eventually, all the parts come together to make one machine or system and we need to consider the big picture early and often. I'm constantly reconsidering priorities on the VBOM because I find I've had to go a lot more in-depth and learn the much of the extruder build process just to understand the parts I need to search for the sources. I was hoping to move on to the FreeCAD soon, but having thorough initial documentation is critical to reducing unknowns and questions later on.
=Mon May 27, 2019=


I like to take time on meeting day to review and think about processes and critique what I did and how. Also to review what others have done and check up on the discussion on the network for anything I've missed or might add ideas to.
Reviewing simple extruder and researching many other CNC/3D printer related ideas. Notes and documentation in Working Doc above.


I think the idea of OSE being an educational organization should be taken further into the teamwork and scrum standup. Suggestions have been improving meeting flow and progress is visible, but critical feedback comments continue to be about process protocols, learning curves, lack of best practices and curricula. Therefore, I am thinking about how to improve scrum standup with a focus on documenting work for a quick presentation to educate the team with interdependencies they may need to know for their work. Giving a presentation during the meeting may make it long, but if devs do more pre-meeting prep or design logs as outlined for scrum stand up it will be easier. One other issue I see is audio though. It is often difficult to hear different devs in the meeting and this likely varies for each meeting, member, and network conditions. I was thinking we could do pre-meeting standup videos, but that may reduce interaction and discussion while increasing time. Perhaps each member could record their audio/video for their scrum standup as a backup during the meeting though. I've often been poorly prepared for the meetings, late with time sheet, slow reconfiguring my mic/audio and forgetting to record a backup on my end. These things need to be made easier and prioritized. I'm also trying to think about how I can create educational media to teach others as I learn and do work. If these goals can be integrated into workflow they will be easier and take less time avoiding the cost-benefit curves of documentation versus getting work done. Standardized templates are not always the right fit either. Different work tasks and individual styles need flexibility in presentation. So I think many of these issues need to be taught to new members so they can actively think about how to solve and apply them as they work.
=Sun May, 26, 2019=


Continued work on VBOM.
Lots of printer research, YT videos, reprap.org, and OSE are all helpful. I can see 24V is a tempting mod given most of the electronics are designed to run at even higher voltages, but starting with a small printer I doubt there are many power or performance issues. I have not found any better info about PVC with cement in small pipes so I am skeptical but hopeful. Even #2 (1/4") rebar won't fit in 3/4" sch 40 PVC. I'm getting 20ft of sch 40 PVC because it comes in 10ft sticks and the extra I can use for testing. Hoping to see some operational data on [[D3D Ohio v18.02]] soon too. I've been thinking about the mounting of all components & wiring. It would be nice if a single box for the components can be made slim, distribute mass & add bracing to the structure as well. It is hard to add angle braces without blocking access to the bed.  


As I finish the Extruder part and move on to the winder VBOM I'm also thinking I could record some video of work and for some instructional to add to intro educational material to aid new devs. The efficiency of audio/video versus wiki/doc text, but many people prefer videos. I think a general review of VBOM tasks and google docs might be helpful. Reviewing how work tasks are done for purposes of educating others helps focus priorities and best practices for workflow as well.
I'm also reviewing the simple extruder, which is indeed simple. https://docs.google.com/presentation/d/1PRpAmQNzDs5laibZo86weuMaEYJLBIvFwt3KOx8DPn8/edit#slide=id.g51b7c7f1c2_0_4
I'm uncertain of mounting options. It doesn't look like I can just use existing parts. My first thought was the hot end should be mounted towards the Z axis so the bed rails can be as short as possible, but there is the clamp to clear. I'm curious about bed size, mass, & Z motion. Is it reasonable to imagine an 8" print area with only 1 Z?


3hrs
I added groups/folders to the CAD assembly for easier axis motion. https://gitlab.com/Abe_Anderson/d3d-mini-pvc


=Sat May 13, 2017=
fascinating thread on composite frames PVC is mentioned. https://reprap.org/forum/read.php?1,578597,579248


Continued work on VBOM. Nearly finished with the extruder parts, specs and links.
=Fri May 24, 2019=
https://docs.google.com/presentation/d/1kcEn6w5-6LOj8CaTewjwlmbjYgZwqZvZFs41FcPaXug/edit?ts=590d4fa9#slide=id.g21ab097799_0_62


=Fri May 12, 2017=
searched for more info on cement in PVC and I found some interesting links, but nothing similar. Listening/watching many 3d printer build videos, reviewing BOM's and looking at part options and prices.


I think I resolved the technical difficulties with my aging dGPU by removing it and using the newer iGPU.
started mod of extruder motor mount. https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/extruder%20motor%20mount.FCStd


Continued organizing the VBOM. Figured out typos and other confusion from the PDF by studying the steps more thoroughly.
=Thurs May 23, 2019=
Some of the product ID #'s like form McM-C are no longer valid, so finding and using actual specs for general searches on sites like eBay and amazon rather than direct links will be the more useful method long term. Probably important to consider how supplies need to be ordered in bulk for workshops and from more local suppliers in bulk when possible. Links and supply prices change quickly so further research likely has to be done prior to orders anyway. Lots of DIY hand/shop work in the build process that probably needs to be done pre-production to simplify workshop assembly and might be automated or designed out in future prototypes.


Reviewing lots of 3d printer info lately and it seems RAMPS has a lot of potential upgrades or issues to fix depending on how you look at it. It looks like RAMPS is still used mostly because it is somewhat robust or at least cheap to burn out. I suspect I'm going to want Trinamic drivers just because of the noise factor since I've set up the printer space next to my desk. TMC2130's are apparently all around more efficient too. It looks like it is better to run them at 24V though, which would require even more customizing. I don't see many variations in the RAMPS with quality components & heat sinks etc. there is the cheap and the expensive.


=Thurs May 11, 2017=
Adapting a quick attach looks complex without more experience and a working 3d printer to test PLA parts with. Adapting the titan bracket looks easy to start, but it is different. It is thinner than the previous mk8 style bracket and may not offer enough clamping force or strength if it gets warm? So, I'll try merging the old and new together in CAD.


Just noticed I seem to have lost some log data from Tuesday. Perhaps caused by hardware/software glitches I've had since changing to my desktop. Probably GPU lockups requiring occasional hard resets.
=Tues May 21, 2019=


I have been continuing work on the VBOM and I am close to getting all the hardware parts listed in it, but need more organization and research on several components to verify specs such as power and materials in order to shop for ideal parts.




=Mon May 8, 2017=
thinking about the alignment part and axis length. I don't think it needs much space to work. Also considering extruder attachment methods.


Meeting.
meeting prep.


[https://docs.google.com/presentation/d/1kcEn6w5-6LOj8CaTewjwlmbjYgZwqZvZFs41FcPaXug/edit?ts=590d4fa9#slide=id.g218a06c084_0_31 Extruder VBOM]
Looking at the old Mk8 Style extruder motor holder for potential modifications.


=Mon May 20, 2019=


=Sun May 7, 2017=
changed x axis and added to assembly. needs more alignment.


Continued Extruder VBOM. Looks like I am over half way through the list excluding plastic parts.
=Sun May 19, 2019=
Should go faster now that I'm more familiar with the parts and project, but some parts need more thorough review to get the basic specs down so more shopping can be done for new sources.
I also need to organize the visuals in a more useful manner.


found the angular misalignment of the carriages and constrained them further. I started to add the extruder, but the 3.5MB size is a bit much and I don't see any easy way to reduce it. I think the X axis needs customizing to length first anyway.


=Sat May 6, 2017=
https://gitlab.com/Abe_Anderson/d3d-mini-pvc


Progress on Extruder Visual BOM
=Thurs May 16, 2019=


4 hrs
https://gitlab.com/Abe_Anderson/d3d-mini-pvc numerous updates and simplifications of axis' parts. Much smaller files in some cases, but with enough features to position parts in assemblies accurately. Testing of newer freecad versions.


=Fri May 5, 2017=
Testing A2P WB and it works much better than A2 WB just because there are no long hangups, but I do think I've run into some other issues. It is much faster and simialr enough it is easy to use though.


While working on redrawing the Lyman extruder parts in FreeCAD a few things have occurred to me. One, it would be great if there was a plugin for FreeCAD that could attempt to draw new shapes based on the approximation of an STL. I imagine this might be possible to do in python. Two, any optimizations to shapes should be made now while redrawing. Looking at the extruder filament winder disc shape I was wondering if there might be a stronger part pattern that uses less material and maybe prints faster. Would a honeycomb hole pattern be better or would that slow printing with complex motions. If the idea is to mass print parts with low res (large nozzles) and fiber reinforced plastic there may be an ideal minimal pattern for maximizing print speed and part strength.
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/assembly%20plus.FCStd


http://network.opensourceecology.org/newsfeed/707295417586425865
X axis appears to be unlevel from the side I think some of the clamps may be at slightly different levels due to constraint picking.


Watched/listened to Jose and Marcin's YT video on Lean Scaling. I probably didn't catch everything, but it was interesting.
=Tues May 14, 2019=


Got side tracked with a Linux and hardware issue, but I think I got it all fixed now. I see ubuntu is installing a freecad update too. Hopefully, I'll have better performance all around.
reviewing [[File:Xy bracket.fcstd]] and [[File:D3Dfinalassemblyv1902.fcstd]] recent changes to consider part use overlap or versioning.


I need to consider the cheap 3D printer options and comment on the network.
=Sat May 11, 2019=


Examining docs from Marcin and reprioritizing on the extruder.
more re-assembly of D3D with new XY bracket.


=Thurs May 4, 2017=
Note for the changes to [[File:Xy bracket.fcstd]] I reworked the part off measurements and in doing so thought I'd see if just drawing half of it and mirroring would be faster. In hindsight I doubt this helped much. Checking & copying measurements or sketches from other parts takes about as much time and there may be reasons to break the symmetry. Also, the mirror function being in the part WB makes the workflow seem a little confusing. The newness of the body & part structures and how it shows in the tree are primarily what made it seem odd.


Working with filament winder STL files in freecad. Conversion of STL's to normal geometry is imperfect at best. Simple files look ok, but are not ideal to work with in every way. I think redrawing the pasrts while time consuming will be better long term.  
I'm still thinking about slots versus holes and I'm curious if it can be used to offset the bed (with another part) up to reach the nozzle from the overhead X axis.


https://youtu.be/En44XRzCGmk
Something weird is going on. Every time I try to adjust the length of the rods in the axis' the length between the top and bottom Z clamps measures slightly shorter as if the frame is adjusting smaller as well for some reason!!? Oh, missing constraints allowing movement of clamp.


Tested upload of video recording using oggvorbis audio with 8fps libx264 video. I thought YT had dropped the audio, but it did not, which is fantastic for uploading small video files.
resolved axis length. https://gitlab.com/Abe_Anderson/d3d-mini-pvc


https://youtu.be/ESze2HZgBWM
If the XY Bracket gets slots the X axis ends can be made flush with the back of the brackets. It is only 0.2" off one way from that now. With slots lining up the position correctly is the only major potential point of error in the assembly I can see now.


http://network.opensourceecology.org/groups/profile/706569168643694602/activity
=Fri May 10, 2019=


2 hrs
Writing return email to Marcin. Looking at X-Y axis alignment on D3D Mini PVC. The X-Y angle bracket isn't quite symmetric, but the holes line up with the larger U-Axis parts, but not the holes in the short idler. I'm wondering if a slotted XY bracket would help make mounting various designs easier. Keeping to the universal parts is still a challenge given various sizes of frames and axis length possibilities.


=Wed May 3, 2017=
The bed height to the extruder nozzle needs to be solved as well. Bolting some existing parts together should work as in similar designs, but I don't see what is easiest yet. For some aspects it looks like changing rod length and/or mount points would still be easier.


Speed reviewed meeting on YT.
https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/D3D%20Mini%20PVC%20Full%20Assembly.fcstd


Attempted to create Extruder work group on network, but I am not sure it is working right.
I'm trying to understand the XY bracket misalignment more thoroughly to decide what is the more future proof universally compatible part to change. Making slots seems more future proof except that it creates the possibility of slip and error in physical assembly. I see the v19.0x use the half-carriage, but that doesn't make sense for this design and simplicity would be nice all around. I see the XY bracket sketches aren't constrained and look off, but they appear to constrain and align well in assembly. The asymmetry is only the first issue to fix. The length for this printer is different from the original use, which is why I'm considering slots. If more holes are added it will work for only the current build designs, but slots will give flexibility for future size variations.


Continuing to review Lyman docs and researching easiest methods to convert the existing printer files to FreeCAD.
=Sat May 4, 2019=


I just noticed the Lyman extruder spooler is licensed under http://creativecommons.org/licenses/by-nc-sa/3.0/ and not exactly per OSE guidelines [[Open Source Ecology:Copyright]].
reworking D3D Mini PVC full assembly https://gitlab.com/Abe_Anderson/d3d-mini-pvc


This means the existing Lyman parts can not be replicated commercially, which I think conflicts with OSE's Distributive Enterprise goals. I think OSE files derived from the original work can be made per OSE Guidelines, but not being a lawyer I'm not sure I understand derivative works and separate licensing.


2hrs
=Fri May 3, 2019=


=Tues May 2, 2017=
catching up on FreeCAD status. https://forum.freecadweb.org/viewtopic.php?f=4&t=35546
FreeCAD 0.18 is technically officially released to source code at least. 0.18 includes mostly backend updates like python 3 support and other good long term under the hood fixes. So effectively skipping 0.17 may be fairly easy.


Examining Lyman files in more detail.
I see the issue I noticed before with a FreeCAD version not fully loading is 0.18.1, which is the current official stable version. FreeCAD Daily 0.18 loads ok. 0.17 is running from an app image I think. I see many new interesting workbenches I haven't tried before in the add-on manager.  


=Mon May 1, 2017=
Reworking the D3D Mini PVC with more separate parts like the carriages on the axis' also makes the assembly more complex. I see that the freecad assembly forum thread suggests for most simple assembly needs the part and body containers relative and absolute positioning is good enough.


Meeting.
=Tues Apr 30, 2019=


Found and downloaded the Lyman files. Watched the YT video of v6 https://www.youtube.com/watch?v=H6h1yDzoPMU. I had been assuming we were going to have to redesign something similar to the bioplastic extruder, but it looks like the Lyman extruder is complete and open source.
improving CAD for the full assembly of https://gitlab.com/Abe_Anderson/d3d-mini-pvc


2hrs
=Fri Apr 26, 2019=


=Old Logs=
Almost done with the 3D Printer shelf I think, but I'm more busy with spring planting etc.


*[[AbeAnd Logs January]]
I found some interesting 3D printed garden seeding tools and companion planting patterns. I've been hoping to find simple tools and ways to automate more complex seeding patterns. There are many plastic seed tools I've seen that might be 3d printable, but accuracy is probably important for small seed tools. Maybe adjustable tools could be designed as well. If the print quality is low precisely drilling holes ends up being needed anyway.
*[[AbeAnd Logs February]]
*[[AbeAnd Logs March]]
*[[AbeAnd Logs April]]
*[[AbeAnd Logs May]]
*[[AbeAnd Logs June]]
*[[AbeAnd Logs July]]
*[[AbeAnd Logs August]]
*[[AbeAnd Logs September]]
*[[AbeAnd Logs October]]
*[[AbeAnd Logs November]]
*[[AbeAnd Logs December]]


*[[AbeAnd Logs 2017]]
https://www.thingiverse.com/thing:23466
*[[AbeAnd Logs 2016]]
http://organic.kysu.edu/CompanionSpacing.shtml


[[Category:Logs]]
Besides having shelf done for a printing workspace I need to RTM, develop and go through checklists for what 3D Printer parts I need to order f

Latest revision as of 02:45, 13 October 2019


HintLightbulb.png Status - Done: more D3D Mini PVC assembly To Do: quick couple Blocks: time

General links Critical Path Roadmap mediawiki formatting help Development Team Log OSE Hangout OSE Jitsi Meet Abe's Links Abe's OSE Google Drive Folder Abe's OSE Google Calendar Abe's YouTube channel

edit

Current Logs

Sat Oct 12, 2019

reviewed WebGL tutorials. Trying to decide what to CAD next given the difficulties of what is immediately good enough while trying to align that with good future design goals so there to create forward momentum and reduce double work.

Created new gitlab project repos.

https://gitlab.com/Abe_Anderson/D3D-Simple-Extruder

https://gitlab.com/Abe_Anderson/Kinematic-Mount

I've considered many possible ideas for kinematic style mounts that could be automated, but I don't think any have been viable yet. I need to look at more mechanical examples, hand draw some ideas and just try some experimental CAD. The round head bolts seem passable, but finding other generic bolts the right size may not always be easy. The shape of the plastic parts has to be complex to accommodate multiple features. A latching mechanism needs to work by moving along multiple axes and attachment of levers is not easy either.

Thurs Oct 10, 2019

Meeting. I reviewed emails and doc changes. It sounds like a lot of good progress on projects, but not a lot of uploaded files yet.

Sat Oct 5, 2019

more email with Chris & William. I exported and uploaded STL's for the Simple 3D Printer Extruder PLA parts.

I added links diagrams to the STEAM doc and did lots of brainstorming about easy printable possibly kinematic tool mount.

https://docs.google.com/presentation/d/1pDEjvuqPt6b8iXULDGtRTPE8YsbaTSFLy1pe-paaOSU/edit#slide=id.g64a18b2cd3_2_0

Also thinking about tool changing. Hoping there is some X,Y,Z dance the machine could do with a tool to release and latch it into a mount without extra motors/servos etc. A tool mount that could do that maybe complex would it might beat having extra motors easy if it is elegant and has great MTBF. No living hinges or flimsy push-push latches. Maybe it needs metal springs. I wonder if the mount mechanisms could actuate with 2-3 axes of motion if needed.

Fri Oct 4, 2019

I responded to an email from Chris about the simple extruder. More thought and reading is needed on the quick coupling concepts...

I updated the D3D v18.10 BOM with 3/8" nuts and resolved the comments. I selected what I thought was the most universally useful for the price. https://docs.google.com/spreadsheets/d/1eCYxQkOZ6GKS5zkTIKQneVsXDnhAc99Twsm2upWlFn8/edit#gid=0

Reading more about kinematic coupling and I looked up William's extruder work from today as well. I wonder how accurate 3d printed plastic couplings could be if bolted together. That appears to work for camera mounts, but I question the repeat accuracy. I also wonder about embedding 3 nut catchers in the carriage in such a way they would be compressed and not move much post assembly. Adding the requirement of complex off the shelf metal parts like balls and grooves would likely add cost. In the long run, they could be milled, but the accuracy requirements are likely higher than what will be achieved soon.

Sun Sep 29, 2019

Doing a little more research on kinematic coupling and tool changers. Immediately the need is just for a quick couple, but it would be nice if it was at least partially scalable for future tool changing needs.

I think there are ways to make a dock that effectively catches and releases tools without extra servo or stepper motors by using the force of moving the head in/out of the dock. I also think 3D printed plastic parts might be accurate enough for most printers if the design is good enough. I'm not familiar enough with the mechanics of kinematic coupling yet.


Sat Sep 28, 2019

emails about added links, simple extruder, and the printer manual docs.

Reviewed more STEAM Camp docs and made requests on the gdocs for the printer manual to fix the missing nuts.

Added more links and better organized some wiki pages since the previous ones I made were fairly bare. Adding one base starting wiki page for each project would help the new team get started on the wiki quicker and I see new templates using wiki code.

I updated PVC assembly with 10mm nuts and adjusted the heat bed relative to them to compensate for the ~0.5mm difference of 3/8" nuts assuming that is a better fit. The JB Weld method well always cause some variation. I think the heat break on the simple extruder could be shorter yet, but plenty of feedback is needed on the simple extruder assembly before assuming anything.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc

I think it would still be best to migrate the simple extruder and assembly to its own repo or something similar.

Fri Sep 27, 2019

I linked a few things in the STEAM Camp doc and added links to connect pages better on the wiki.

Thurs Sep 26, 2019

I've been reviewing the STEAM Camp material and thinking about critical feedback I see in some of the interviews. So I made some notes on collaboration efficiency in my general working doc.

I've also been thinking about a better tool head attachment. Even for the PVC frame. It probably isn't stiff enough for heavier milling, but tool head quick attaches and even automated tool changers are important for making the D3D more of a small universal micro-factory CNC machine. One issue I can see is mounting to the U-Axis carriage currently requires mounting around it on both sides. The other open-source solutions kinematic coupling with three points and this seems ideal. Given there are already open-source designs by lulzbot, e3d, and others we should be able to adapt something without reinventing the wheel. Maybe even just pick and existing standard. The question is how best to mount it to the carriage. If it is feasible I can see reasons to add some bolt holes to the carriage if it makes it more universal it is a win.

https://reprap.org/forum/read.php?1,622267,622362

https://en.wikipedia.org/wiki/Kinematic_coupling

http://download.lulzbot.com/


kinematic coupling

D3D tool changers

Mon Sep 23, 2019

I made comments to multiple D3D files about the lack of M10 nuts required to fit over the 8mm rods for JB welding the heat bed as shown in the printer manual.

Looking at other printer BOM's...

Sun Sep 22, 2019

I responded to an email from Marcin about the Simple Extruder assembly and STEAM camps.

uploaded photo of the simple extruder assembly.

Working out more PVC assembly details with the heat bed mounting (JB Welded nuts). I recently changed most of my Freecad installs over to the app image packages and just had to reinstall the fastener WB for some reason.

Another relevant side topic I researched recently is battery packs. We have a retired nomadic friend that visits the farm in winter who is science-oriented and recently shared a video of a battery pack build and said he would like to try a build this winter. His goal is to design a small solar and battery pack system for periodic portable cooking because the cost is now low enough it might save him money over gas tanks. I'm skeptical of it, but I learned quite a bit from him before about such topics so I will document anything that comes of it. https://docs.google.com/presentation/d/1iUEES6Pqmc6Fz3nmrmUMhBxXQI_egm7yCMXfZ0wrr-0/edit#slide=id.p

The printer manual appears to reference and BOM that does not include large enough nuts to go over the 8mm rods. It looks like it needs to be 4 x M10 nuts. Further investigation is needed.

https://docs.google.com/presentation/d/1LRL6PQtWm0LT6j6YNjLNjDAdbKkd3TmO8_aOBdfskhI/edit#slide=id.g41779cb437_4_98

Sun Sep 1, 2019

edited meeting doc again and added reevaluation of meetings to the agenda to see if we can get more attendees at a different time if needed. The meetings tend to be more broad brainstorming that veers off focus some, but individual progress reports are useful for the big picture. I think we need to create more jitsi meets as needed in case of overlapping meetings. https://meet.jit.si/OSE_Dev_Team_Meeting 

https://docs.google.com/presentation/d/1RvglDNOgP5idzJ0ZvKq1EktuatM23rJ4pMLI5degjYo/edit#slide=id.g1861bf60d5_0_6

I'm trying to adjust the filament path angle more, but having trouble rotating or attaching the sketch to a datum plane correctly.

I added the nema 17 motor mounting bracket. I think the simple extruder should be moved and restructured under it's own gitlab project, but the gitlab site is glitching at the moment.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware

Sat Aug 31, 2019

I made repeated small changes to the simple extruder parts to find ideal alignment of the plastic parts, bolt holes and filament path. At first I expected to leave the bolt points alone, but after fixing the symmetry in the filament path and experimenting with the angle/spring tension it was clear the bolt point on the tension arm didn't look right. It is a concern to experiment with the bolt points because of post-print shrinkage. General experimentation done on the original may effectively need to be redone since the CAD is redrawn from measurements anyway. I made notes on a possible mod to the spring design, but making it more compact looks like it has tight tolerances and will require a lot of experimentation with prints so that is something for later.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder


Tues Aug 27, 2019

made adjustments to simple extruder including the plastic parts. I'm trying not to change most of the original metrics since they appear to be accurate caliper measurements, but somethings seem way off around the filament path. So I'm centering some holes symmetrically and I added measurements in spreadsheets based on the NEMA17 standard.

I added a "spring" for more visuals. I think I can use datum plants and lines to help find the right positions for the filament holes. I increased thickness of the spring base bracket as well. It would be nice to countersink a standard hex socket M3 instead of the countersunk head style screw. It also seems the bolt in the spring could be eliminated, but that may require some prints to refine the fit due to shrinkage etc. I'm also thinking some of the CAD needs to be bigger due to measurements of the original PLA due to shrinkage. Changing the angle of the bearing bracket only made it look worse.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder

Mon Aug 26, 2019

I keep finding more slight alignment issues. Looking back at the recent photos there appear to be a known issues. Most of these details will never be that perfect when cut by hand and there must be enough slop in the PLA parts they bolt up anyway, but it is nice to get the CAD close to check all the measurements. The filament path definitely looks like some updates would help feed.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder

Sat Aug 24, 2019

Reworking at the simple extruder mounting bracket assembly. https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder

The current simple mounting bracketing style is similar to the e3d bracket. In photos the original looks like a black metal angle bracket. The new printed version that looks possibly warped a little. So, something in between would be better. Also, because it mounts between the base block and the motor there may be thermal issues. This seems likely given the melted appearance of the spring bracket in photos. To prevent possible warping and given the need to push the temps up for materials other than PLA some insulating material like PTFE adhesive tape may help. PTFE tape appears to be used on the threads in the original photos already. I suppose a longer heat break could help as well, but it already looks to long in the current CAD. For flex filament I was assuming a custom Al milled design would be difficult, but for testing, I wonder if just using a longer heat break threaded up through the base block and ground on a wheel to shape would be good enough.

Tues Aug 6, 2019

created cad with spreadsheet for nema motors with some mounting details for adding to the simple extruder assembly.

I only entered data in the spreadsheet for nema 17, but it could probably be designed with more automated selection options depending on how much more hidden complexity is available in the freecad spreadsheet WB.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder

Sun Jul 28, 2019

tested simple extruder assembly and adjusted simple extruder metal part dimensions.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder

Fri Jul 26, 2019

I think I resolved the freecad error with the nozzle file. I may understand it partly. 

The error message is: Object can only be in a single GeoFeatureGroup

I rebuilt the pads from the sketches, but first had to remove the body and part containers and re-add everything in the right order and place. I tried detaching the hex sketch and reattaching it, which kept giving the same error primarily because I kept clicking the wrong function. I was mistakenly clicking the negative loft button instead of additive. I explored the new additive and subtractive functions before with interesting results but frequently forget.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/Simple%20Extruder/nozzle.FCStd

Wed Jul 24, 2019

I went to finish the nozzle and the file is somewhat corrupted. Using the compound function may have caused the problem. That workflow did not look good so I tried to delete it to do a fusion instead and that is when problems started. The part design WB then detected issues and started suggesting migration to the new part WB. I tried auto migration and other ways. One fix suggests separate part bodies for each pad. Maybe that is a more correct workflow in some cases, but I think using different functions from other WB's including the loft changes the tip or creates a separate feature without a body by default causing confusion. I may also have attempted moving different features to the body or part containers at different times by dragging them that caused issues as well. I need to understand the suggested workflow for bodies and part containers better. I may need to delete the pads and recreate them by reattaching the sketches. Or it may be faster to try redoing it in a different order.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/Simple%20Extruder/nozzle-glitch.FCStd

I also looked at and experimented with the heat bed size, the printable area and how it is defined in Marlin.

I also added some info to Analysis of PLM Software Conflict Resolution. Generally improving the collaboration software abilities seems important, but with few contributors, it remains a lower priority. However, this is somewhat a paradox since ease of use would encourage more users to engage in prototype development.

Tue Jul 23, 2019

added simple extruder files to https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/Simple%20Extruder

I'm guessing the dimensions from the photos & using spreadsheets so these can be changed easily later.

I got most of the spreadsheets & CAD done for the metal parts of the simple extruder. The sheet values are approximate on a few things, but I tweaked them to look close.

The spreadsheets and values are surprisingly easy to edit. I wasn't really able to break them. If you move alias cells it clears them in the sheet, but not in the CAD values, so it is fairly easy to fix. It is time-consuming with all the data entry but looks worth it in the long run.

Sat Jul 20, 2019

I see the continuing work on the OSE Simple Extruder. https://photos.app.goo.gl/fWUX8ynAdqcn6Fvs6 https://drive.google.com/drive/folders/17BLyvyk1EbrMOhkCfeSwByAq86SemSLX https://wiki.opensourceecology.org/wiki/William_Neal_Log#Thursday_June_27

While there is a lot of flexibility in the PVC and clamp design one of the less exact remaining details is the mounting if the extruder and its position relative to the bed. A mod of the E3D bracket should work fine, but a better quicker modular system would be useful. I'm curious to see what open solutions lulzbot uses.

Lulzbot has cat guards, which must be open source. This seems similar to an "enclosure". Reprap forums suggested while it may be legal for many to build enclosures individually it should not be discussed due to the yet unexpired patents.

In order to run Printers indoors or outdoors, animal guards would be useful. https://ohai.lulzbot.com/project/cat_guard/accessories/

Moved the extruder mount underneath the carriage this gets it much close to the bed. The Simple extruder might be close to long enough. However, I'm uncertain about wiring and cable chain logistics.

Fri Jul 19, 2019

added more comments on soil mixer brainstorming. https://docs.google.com/presentation/d/1RJg3LyG_jI_gmUwBFuwNjbAMVUmuYUo7uQVjLDV9Qiw/edit#slide=id.g5dc8542d49_11_96


adding plastic 3D printed parts section to BOM and sections in wiki/part gallery to note printing tests and recommended parameters. Tested print settings could also be individually listed in STL file pages. https://docs.google.com/spreadsheets/d/1lgtDWFMfNn7fEidPdlap_8PqSDXJFyM_AKvdjq6KSWs/edit#gid=0

Thurs Jul 18, 2019

reviewed more CEB soil mixer info and returned Aidan's email.

Wed Jul 17, 2019

got email from Aiden yesterday whom I missed in the jitsi meet. Added some scribblings to the soil mixer doc. https://docs.google.com/presentation/d/1RJg3LyG_jI_gmUwBFuwNjbAMVUmuYUo7uQVjLDV9Qiw/edit#slide=id.g5dc8542d49_4_0

It is a little hard to visualize in 3d so far. The height logistics of loading design over a press as well as the feeding and exiting of materials seems difficult. Rotating it 45 deg is a half solution. Maybe a more complex drawer design would be worth considering. I can imagine the drawer system will need cleaning due to cement. I think the cement access will need a cover to keep water out in case that is sprayed into the soil hopper as well.

I like the metered/dosing concept for 1 block at a time. I think that will reduce the need for raw horsepower frequently seen on big batch mixers. A good hammermill is important to since soil types vary. With test SCEB's here I think many of the poorer higher cement content ones have chips, slight crumbliness, weakness due to poor mixing. If the clay is moist it clumps and can't mix well with sand. Here the soil is mostly silt, sand, rocks, & sandstone often on top of a hard moist clay layer 18" down or so. Even if there is enough material in some areas on location digging the right amounts and thorough mixing are a challenge. In fact, in some cases I can see it needs to be dug, then dried some then milled so it powders and mixes better.

Tues Jul 9, 2019

cleaned up meeting doc for next week. Reviewing D3D BOM's trying to decide which parts & features to drop or add.

Sun Jul 7, 2019

Continued reviewing workshop info and the D3D CNC Mill CAD, which is impressive.

I see improvements all around in the workshop media. The hard part seems to be getting critical feedback from workshop participants, especially less technical people for which more feedback is needed to refine the educational media. I think the technical peoples perspective is generally it's nice to review the detailed engineering info and it is great for the average person to learn lots of STEM. But, what is most useful from the less technical persons perspective?

At first, I was thinking a lot of the info is also geared towards more visual learners and maybe other styles need to be covered as well, but I also see the OSE Design Manuals have outlined lists even though they are in slides, so there is room to consider more of both. Obviously, the hands-on shop parts are probably everyone's favorites, but since the lectures are likely precursors to specific shop work getting everyone up to speed is helpful to the swarm effect. As usual to refine all that practically requires a whole other team.

Also getting part counts into https://docs.google.com/spreadsheets/d/1lgtDWFMfNn7fEidPdlap_8PqSDXJFyM_AKvdjq6KSWs/edit#gid=0


Fri Jul 5, 2019

I listened to some videos from the workshop and glanced over the 2" U-Axis doc, but still, don't have a clear picture of many concepts. I'm surprised at the size of the CNC Mill if I'm understanding correctly it may have about a 2' working area/volume? I figured for a precise mill for small metal parts that several inches would be sufficient.

A question: Given that much of the OSE workflow tends to bias towards visual learning styles how might the guided learning style in workshops be done to enable those of other learning styles to better understand existing visual documentation tools and apps?

Individuals can choose different tasks that suit their style, but we need people to learn freecad from whatever approach suits them. There were other requests for more vocabulary definitions and a glossary was a suggested solution that would be ideal. There are also existing wiki's and docs for apps like freecad, for which more links could be provided and reviewed in the lectures.

Updated my working doc (top right) with a pros/cons list of using another spreadsheet to speed swarm work of part spec collection prior to CAD drawings. I think it might be faster in ways, but I'm uncertain about the overall flow and hangups. Current methods in design sprints and workshops are to lookup the links in the BOM and find specs for parts you pick. There is some double work looking up interfacing parts specs even in a workshop where individuals can directly communicate it requires more time and interruptions. This should leave more time for needed for discussion of clearances/tolerances and understanding interactions between parts.

Thurs Jul 4, 2019

away from my Linux workstation still without a good laptop, but I've reviewed some of the active steam camp materials. Interesting to see the development and discussion as usual. I'm trying to understand the details for the 2" Universal Axis. It looks like they need a number of changes to be ready for printing.

I added a spreadsheet to File:2axismotorpiece.fcstd because I think Williams FreeCAD Workflow seems ideal for sharing consistent data values across many similar parts quickly.

Maybe a gdoc sheet would be good too. It could be sectioned with values shared across parts and changed in real-time. It should be easy to copy/paste those cells to freecad sheets then there is less data entry for each person and values remain consistent. It should also reduce typos. When values are uncertain it is also easy to copy lists of needed dimensions to keep dev's on the right track and remind people what data is still missing.

Mon Jul 1, 2019

I finished cutting up the PVC sch 40 pipe a while back for the D3D PVC Mini. I'm traveling for a few days but hope to figure out how to collaborate more during the workshop.

For the D3D PVC Mini I need to do more precise CAD of the simple extruder for which some CAD is not yet done. I think I can approximate a placeholder good enough.

I also need to further research the sources from existing BOM's. Jon reported issues for D3D Ohio parts and I'd like to avoid those.

I'm not far from ordering parts, but some of the little details are going to be important to verify first.

I'm glad to hear the STEAM Camp chose to do the Torch Table project. I think the priority order is Torch Table, CNC Router, Metal Printer. Because the Table has been in waiting for a while and well accelerate other projects significantly. The CNC Router is next because it can take lower precision parts and make them higher precision via subtractive work. The metal printer is relatively unknown and creates small low precision parts initially. Empirical testing is needed to find the hangups for the metal printer, but the use cases are more long term.


Tues Jun 18, 2019

Busier than expected with farm guests lately, but I am continuing on the D3D PVC Mini. I've cut sch 40 3/4" PVC to ~10.66" for testing. I already observe at such short lengths it is quite rigid. At 2ft it has noticeable flex under force, but infills could reduce that significantly. Vibration is harder to judge, but when supported well at both ends peices don't visibly vibrate much.

Fri Jun 7, 2019

added a bed holder to the assembly. It still needs a different design because of the offsets with the frame. To keep the bed holder length short it would be better to move the Z axis inside, but it also doesn't look like that will fit with the clamp.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware

Tues Jun 4, 2019

Busy with farm guests so likely to miss the meeting.

Next steps trying to get good enough measurements of the simple extruder to create an assembly to help determine which way is best to orient the extruder on the X-axis.

Sat Jun 1, 2019

attempted FEM in FreeCAD on rods some trouble at first, but finally succeeded on the tube as well. I'm uncertain how easy it would be to add complexity and multiple part assemblies and materials. It seems to only work well in simplicity, but part of that is technical experience as well. At first I was concerned with following tutorials closer and in the same order, but I think the errors were fixed by resets of freecad and finer mesh when needed. Attempting a realistic large scale 4ft gantry of the Universal axis may not be worth the time. I'm uncertain yet if it can model the compression and stiffness concepts.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/tree/master/Hardware/FEM


Tues May 28, 2019

Added more notes.

Working on CAD assembly. moving X axis alignment. Further grouping and labeling all parts and axis' as similar to exiting OSE D3D machines as possible.


Mon May 27, 2019

Reviewing simple extruder and researching many other CNC/3D printer related ideas. Notes and documentation in Working Doc above.

Sun May, 26, 2019

Lots of printer research, YT videos, reprap.org, and OSE are all helpful. I can see 24V is a tempting mod given most of the electronics are designed to run at even higher voltages, but starting with a small printer I doubt there are many power or performance issues. I have not found any better info about PVC with cement in small pipes so I am skeptical but hopeful. Even #2 (1/4") rebar won't fit in 3/4" sch 40 PVC. I'm getting 20ft of sch 40 PVC because it comes in 10ft sticks and the extra I can use for testing. Hoping to see some operational data on D3D Ohio v18.02 soon too. I've been thinking about the mounting of all components & wiring. It would be nice if a single box for the components can be made slim, distribute mass & add bracing to the structure as well. It is hard to add angle braces without blocking access to the bed.

I'm also reviewing the simple extruder, which is indeed simple. https://docs.google.com/presentation/d/1PRpAmQNzDs5laibZo86weuMaEYJLBIvFwt3KOx8DPn8/edit#slide=id.g51b7c7f1c2_0_4 I'm uncertain of mounting options. It doesn't look like I can just use existing parts. My first thought was the hot end should be mounted towards the Z axis so the bed rails can be as short as possible, but there is the clamp to clear. I'm curious about bed size, mass, & Z motion. Is it reasonable to imagine an 8" print area with only 1 Z?

I added groups/folders to the CAD assembly for easier axis motion. https://gitlab.com/Abe_Anderson/d3d-mini-pvc

fascinating thread on composite frames PVC is mentioned. https://reprap.org/forum/read.php?1,578597,579248

Fri May 24, 2019

searched for more info on cement in PVC and I found some interesting links, but nothing similar. Listening/watching many 3d printer build videos, reviewing BOM's and looking at part options and prices.

started mod of extruder motor mount. https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/extruder%20motor%20mount.FCStd

Thurs May 23, 2019

Reviewing lots of 3d printer info lately and it seems RAMPS has a lot of potential upgrades or issues to fix depending on how you look at it. It looks like RAMPS is still used mostly because it is somewhat robust or at least cheap to burn out. I suspect I'm going to want Trinamic drivers just because of the noise factor since I've set up the printer space next to my desk. TMC2130's are apparently all around more efficient too. It looks like it is better to run them at 24V though, which would require even more customizing. I don't see many variations in the RAMPS with quality components & heat sinks etc. there is the cheap and the expensive.

Adapting a quick attach looks complex without more experience and a working 3d printer to test PLA parts with. Adapting the titan bracket looks easy to start, but it is different. It is thinner than the previous mk8 style bracket and may not offer enough clamping force or strength if it gets warm? So, I'll try merging the old and new together in CAD.

Tues May 21, 2019

thinking about the alignment part and axis length. I don't think it needs much space to work. Also considering extruder attachment methods.

meeting prep.

Looking at the old Mk8 Style extruder motor holder for potential modifications.

Mon May 20, 2019

changed x axis and added to assembly. needs more alignment.

Sun May 19, 2019

found the angular misalignment of the carriages and constrained them further. I started to add the extruder, but the 3.5MB size is a bit much and I don't see any easy way to reduce it. I think the X axis needs customizing to length first anyway.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc

Thurs May 16, 2019

https://gitlab.com/Abe_Anderson/d3d-mini-pvc numerous updates and simplifications of axis' parts. Much smaller files in some cases, but with enough features to position parts in assemblies accurately. Testing of newer freecad versions.

Testing A2P WB and it works much better than A2 WB just because there are no long hangups, but I do think I've run into some other issues. It is much faster and simialr enough it is easy to use though.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/assembly%20plus.FCStd

X axis appears to be unlevel from the side I think some of the clamps may be at slightly different levels due to constraint picking.

Tues May 14, 2019

reviewing File:Xy bracket.fcstd and File:D3Dfinalassemblyv1902.fcstd recent changes to consider part use overlap or versioning.

Sat May 11, 2019

more re-assembly of D3D with new XY bracket.

Note for the changes to File:Xy bracket.fcstd I reworked the part off measurements and in doing so thought I'd see if just drawing half of it and mirroring would be faster. In hindsight I doubt this helped much. Checking & copying measurements or sketches from other parts takes about as much time and there may be reasons to break the symmetry. Also, the mirror function being in the part WB makes the workflow seem a little confusing. The newness of the body & part structures and how it shows in the tree are primarily what made it seem odd.

I'm still thinking about slots versus holes and I'm curious if it can be used to offset the bed (with another part) up to reach the nozzle from the overhead X axis.

Something weird is going on. Every time I try to adjust the length of the rods in the axis' the length between the top and bottom Z clamps measures slightly shorter as if the frame is adjusting smaller as well for some reason!!? Oh, missing constraints allowing movement of clamp.

resolved axis length. https://gitlab.com/Abe_Anderson/d3d-mini-pvc

If the XY Bracket gets slots the X axis ends can be made flush with the back of the brackets. It is only 0.2" off one way from that now. With slots lining up the position correctly is the only major potential point of error in the assembly I can see now.

Fri May 10, 2019

Writing return email to Marcin. Looking at X-Y axis alignment on D3D Mini PVC. The X-Y angle bracket isn't quite symmetric, but the holes line up with the larger U-Axis parts, but not the holes in the short idler. I'm wondering if a slotted XY bracket would help make mounting various designs easier. Keeping to the universal parts is still a challenge given various sizes of frames and axis length possibilities.

The bed height to the extruder nozzle needs to be solved as well. Bolting some existing parts together should work as in similar designs, but I don't see what is easiest yet. For some aspects it looks like changing rod length and/or mount points would still be easier.

https://gitlab.com/Abe_Anderson/d3d-mini-pvc/blob/master/Hardware/D3D%20Mini%20PVC%20Full%20Assembly.fcstd

I'm trying to understand the XY bracket misalignment more thoroughly to decide what is the more future proof universally compatible part to change. Making slots seems more future proof except that it creates the possibility of slip and error in physical assembly. I see the v19.0x use the half-carriage, but that doesn't make sense for this design and simplicity would be nice all around. I see the XY bracket sketches aren't constrained and look off, but they appear to constrain and align well in assembly. The asymmetry is only the first issue to fix. The length for this printer is different from the original use, which is why I'm considering slots. If more holes are added it will work for only the current build designs, but slots will give flexibility for future size variations.

Sat May 4, 2019

reworking D3D Mini PVC full assembly https://gitlab.com/Abe_Anderson/d3d-mini-pvc


Fri May 3, 2019

catching up on FreeCAD status. https://forum.freecadweb.org/viewtopic.php?f=4&t=35546 FreeCAD 0.18 is technically officially released to source code at least. 0.18 includes mostly backend updates like python 3 support and other good long term under the hood fixes. So effectively skipping 0.17 may be fairly easy.

I see the issue I noticed before with a FreeCAD version not fully loading is 0.18.1, which is the current official stable version. FreeCAD Daily 0.18 loads ok. 0.17 is running from an app image I think. I see many new interesting workbenches I haven't tried before in the add-on manager.

Reworking the D3D Mini PVC with more separate parts like the carriages on the axis' also makes the assembly more complex. I see that the freecad assembly forum thread suggests for most simple assembly needs the part and body containers relative and absolute positioning is good enough.

Tues Apr 30, 2019

improving CAD for the full assembly of https://gitlab.com/Abe_Anderson/d3d-mini-pvc

Fri Apr 26, 2019

Almost done with the 3D Printer shelf I think, but I'm more busy with spring planting etc.

I found some interesting 3D printed garden seeding tools and companion planting patterns. I've been hoping to find simple tools and ways to automate more complex seeding patterns. There are many plastic seed tools I've seen that might be 3d printable, but accuracy is probably important for small seed tools. Maybe adjustable tools could be designed as well. If the print quality is low precisely drilling holes ends up being needed anyway.

https://www.thingiverse.com/thing:23466 http://organic.kysu.edu/CompanionSpacing.shtml

Besides having shelf done for a printing workspace I need to RTM, develop and go through checklists for what 3D Printer parts I need to order f

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