User:Dorkmo/Log
Dorkmo's Large File Torrent Feed
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april 22, 2015
tweaked the trailer design a little
april 20, 2015
first draft of trailer axel sketchup model
File:Print-traileraxel20150420.stl
april 8,2015
had to order some more drill bits. some of the ones i got were super brittle and broke quick.
think im going to try to build up the portuguese wiki pages. will also use it as an opportunity to test some best practices ideas. i'd like to have a clear table for versions, change log, approx number built, link to file landing page.
- some examples i might incorporate
march 28, 2015
finished cleaning the holes of one side of one cage. i held it flat and poured water evenly over the holes. took about 6 seconds for it to drain through. continuing on.
march 18, 2015
Sign up for osemail on wiki. Will return to dozer gear down.-MJ
i used https://www.3dhubs.com/ to order some larger cages to compare and test out. the local guy that printed them had a very high quality print with ABS, much better than my prints. even with a better print it appears the design as-is requires to have a lot of holes cleaned out.
if battery proves viable, might attempt using a two material 3d print with dissolvable material in holes. or maybe hole design improvement is possible.
in the mean time, going to clear out holes manually and might test larger cages next week.
- design change
- might make the powder area smaller and leave upper part where lid inserts same size.
march 14, 2015
printed two larger cages. tested holes with some food coloring. put a few drops inside, filled sink with water up to top of cage, opened sink drain, able to see color come through holes that are open. it appears more than half of the holes are not open for water to flow through. going to try to get a small drill bit to quickly open up. also considered acetylene torch tip cleaners but i think they might be a fraction too big, and might not be able to cut into.
if the design proves viable, hopefully i could fine tune print settings for more predictable hole success.
http://en.wikipedia.org/wiki/List_of_drill_and_tap_sizes
march 11, 2015
- ordered some nickel powder. readings say edison batteries had nickel flakes layered in the cells.
- going to print new cages double the height.
- might look over the ultra smart charger firmware
- would be nice to tweak some things if its not too difficult
- if it it maxes over 2V lower the mAh's
- disregard internal resistance errors
- does a weird thing where it wants to discharge some before it charges
- would be nice to tweak some things if its not too difficult
need to read more about typical charge scenario
also, found this nifty website to compare text http://text-compare.com/ , i think theres a bug in the cage scad file
march 8, 2015
- discharge data was poor
- voltage reached minimum after 15 seconds
- durring charging the part of the wires coming out of the cages were gassing the electrolyte.
- cages were not charging
it seems that the nickle wires coming out of the cages were alone acting as the electrodes. The resting voltage was around 1.2V which is in the range of what would be expected. i lowered the electrolyte level below the wires and it changed the charge behavior. voltage would max over 2V quickly. In the config I lowered the max charge mA to 1. used the NiCd trick to start charging. I expect the voltage will plateau quickly. will be interested to see if internal resistance changes. will let charge for a day.
march 5, 2015
- hooked up test battery to the ultrasmartcharger.com
- had minimal success, wouldnt recognize as a battery
- it would see it when in battery recovery mode
- but would immediately errorr bc max voltage of 2V around 2.04V
- found the custom configuration utility on their website
- tried to tweak max voltage but even the custom max is 2V
- after a few tests tried lowering the charge currernt to very low
- set to 10
- tricked the charger by tapping a AA NiCd battery on the leads before the charge
- not sure if this actually made a difference but it seemed to help
- running firmware 0.524
- charging continued without error led flashing
after a few hours i pulled the SD card to check the data. the data seems to show that the cell was increasing its voltage. and was indicating it had reached about 25mAh. i assume that is calculated and not truly measured like voltage. in the next couple days i plan to run a full charge, discharge, charge, discharge, charge analysis. i think that will give a true capacity rating.
here are the data for the fist charge attempt google doc
feb 28, 2015
- test charging some standard NiCd batteries to get acquainted with how the charger/analyzer works
jan 31, 2015
- took delivery of the battery charger/analyzer. instructions say the memory card can only be 2gb max.
- need one of these
- need to format to fat16 [1]
- will probably finish cleaning up the groove stuff this week
- might start looking at stepper stuff soonish
jan 3 2015
- cage floats in water, need to constrain
- going to use two inward divots, upper and lower, on narrow sides of cages. will mate with wall outie divots
- add sphere r=caage endwal thickness + divot radius. then subtract divot
- or maybe just make endwall thicker. k.i.s.s.
- going to use two inward divots, upper and lower, on narrow sides of cages. will mate with wall outie divots
dec 12 2014
1st attempt
- iron powder held in cage
- nickle powder seeped out lower half of cage mesh
- may need steeper and/or thicker mesh wall
- small cracks in tub began to leak
- need to finish optimizing SCAD
- nickel wire held by cage lid well
- used 1.5V
- not sure if charging
- charge analyzer would help much
dec 7 2014
printed tub with grooves, did a decent job of preventing layer splitting. seemed to do best when the grooves on one face staggered with grooves on the joining face.
spent some time shifting existing grooves up and down but finally realized need a different strategy
redoing some of the SCAD groove module to allow for more tweaking so the staggering can be ensured. plan: will tweak groove width one side and set it for the rest from that one. then tweak angle on adjoining side and copy angle to side opposite it.
- no word back from battery charger dude. might not work out.
- ordered a 1.5v voltage regulator from digikey to do a dumb charge
dec 5 2014
User:Dorkmo/Ideas/Battery/SCAD/Sandbox#tub_with_grooves_and_eyelets
- added grooves
- added eyelets
- need to finish the other two sides
- not sure what to put through the hole.
dec 4 2014
- might put slanted grooves on the outer wall to try to cut down on printed layers coming apart.
- guna do a larger lid to cover multi cells and have 2 pole mounts
- will have donut mounts on sides that align with mounts on outer walls
dec 3 2014
Ordered a battery analyzer/charger. Should be able to test a single 1.2v cell up to 20Ah.
Probably will only use for design/testing. Would need something else for regular use at 12v.
nov 25 2014
nov 24, 2014
need to build in some adjustable leeway to accommodate imperfect slicing and printing
- tweaks for lid
- going to reduce total length and width of the bottom part of the cage lid by 0.2mm
- need to print without a skirt (oops)
- might chamfer the bottom 0.5mm
- going to put a cone shape hole at the bottom of the wire holes to keep from closing up
nov 22, 2014
- tried to optimize size a little. attempting to get a 12v 10 cell within 200mm max dimension to fit 3d printer.
- changed the cage lid so it can be skinnier.
- added some calculations to attempt to predict how much chemical will be needed for the entire battery
- not really sure how to calc density of powders, so it may be way off. gives an absolute max though.
nov 20, 2014
- printed two cages. look pretty good. better than i expected.
- might slim it down so it holds less powder.
- ordered chemicals. might be a few weeks.
nov 18, 2014
made some stl's. guna try to slice.
nov 17, 2014
mostly finished with the scad work. could clean it up a little but its working. getting printer back in shape, maybe next week.
nov 14, 2014
- reworked the scad for the mesh module, i like i better.
- draws a big matrix of cubes, then rotates it, then gets the intersection() with a cube the size of the wall
- guna do a simple lid next thatll silicone onto the top of it
- might use a small 'rope cleat' to tie off wire going into cage
nov 11, 2014
"Object isn't a valid 2-manifold! Modify your design. See http://en.wikibooks.org/wiki/OpenSCAD_User_Manual/STL_Import_and_Export"
i tried using the mirror() function to make a mirror image of the mesh. apparently that was a bad idea.
nov 9, 2014
- mirrored sides
- need to add divots for clip in
- need to figure out problem with angles above 45
- need to determine cage height from tub height
nov 6, 2014
fixed a bug and centered holes
nov 3, 2014
been slowly working on an OpenSCAD file for the battery idea. got the holes aligned and angled how i imagined them. im a bit of a noob so i probably did the code in the most difficult way imaginable. User:Dorkmo/Ideas/Battery/SCAD
- need to tweak the height and width of the mesh compared to the wall itself.
- also need to make some divots near the base for it to snap into the base of the tub.
- also a lid.
oct 12, 2014
revisited battery. sketched a single cell idea. would hold the ni and fe powders on either side of a printed grid membrane. not much surface area optimization. would like to test something simple and then go from there. need to check on how much electrolyte needs to be around.
sep 18,2014
added metal roof sheet to roof panel
sep 12, 2014
updated roof panel with cross members on 24" centers.
sep 10, 2014
did a rough idea for door frame, collecting more input for next revision.
aug 31, 2014
Roof_Layer_1 Roof_Layer_2 on layer 2 i think i may have put the horizontal piece at either end on the top not the bottom side. need the check
Tue Jul 22, 2014
See Barrel Mixer
april 14, 2014
http://opensourceecology.dozuki.com/c/Controller
http://blog.protoneer.co.nz/wp-content/uploads/2012/10/Arduino-Uno-Mega-Dimensions.png
april 13, 2014
trying out the fritzing program for a new ceb controller board project. Andrew's notes for reqs
finding a couple things for board Talk:CEB Press 6 - Controller Module - Bill of Materials
expiramting with an idea for printable rocker switches that will allow for rubber outer seal and can activate buttons mounted on a pcb. would eliminate wiring board to buttons.
also have been looking over bunny's log for help James Slade Log
pictures of assembled board and wiriing
https://github.com/OSE/ceb-controller/
april 7, 2014
sketched an idea for a more tradition forklift attachment.
feb 21, 2014
general idea for a small earth house