User:Dorkmo/Log
Dorkmo's Large File Torrent Feed
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july 5, 2015
File:Ose-microtrac-tracks-20150705.skp
june 26, 2015
File:Ose-microtracB-20150620.skp
started doing some work on tracks. i think using the style where each sequential track is inner then outer will simplify welding work. will it create problems for sprocket rolling into gap? pinch point?
i think the size of angle iron pads needs to be slightly smaller than pitch between rollers for space between
need to hunt some plugins or converter, cant export sprocket from openscad and import into sketchup
june 23, 2015
For reference, see MicroTrac_2015_Concept
File:Ose-microtracB-20150623.skp
general updates and tweaks to tensioner
june 20, 2015
File:Ose-microtracB-20150620.skp
sketched marcin's new layout idea. so far so good.
put tensioner on small idler. might also need to figure out how to tension 12" pully in front of sprocket.
marcin feedback/made some tweaks
feedback marcin/changed the tensioner device
thought the bolt might need to be torched out but on second look i think its alright
may 7, 2015
- added some small rollers.
- might be tricky to keep from getting caught on linkage of treads
- perhaps find plastic/rubber wheels that would less likely catch
- might be tricky to keep from getting caught on linkage of treads
- might make front and back rollers larger diameter
- need more ground clearance
- might move rotor units apart 4 more inches
- longer track length to support more
ose-microtrac-tracks1-20150507-2.skp
TODO:
- find dimensions of standard attachment plate
- design
- revisit other design/mounting options
- sketch model with both motors behind pc
- utilize different length of track
- sketch model with both motors behind pc
- make 3d scale model for printing and testing
april 29, 2015
updated File:Ose-trailer-high16-20150428.skp to have a platform attached to axle
began work on microtrac tracks mounting. utilizing existing motor mounts. File:Ose-microtrac-20150429.skp
april 26, 2015
design sprint meeting on MicroTrac_2015
april 23, 2015
Added some more design proposals for trailers
april 22, 2015
tweaked the trailer design a little
april 20, 2015
First draft of trailer axle sketchup model:
File:Print-traileraxel.skp - Trailer Axle at Warehouse (you can zoom and rotate below:
File:Print-traileraxel20150420.stl
To see how these are used to make scale models, go to Lay-Flat_Trailer#Scale_Model_Rapid_Prototyping
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