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
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]]
[[Image:Image20141103-batteryprogress.jpg|400px]]
*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.
[[User:Dorkmo/Ideas/Battery]]
[[Nickel-Iron Battery]]
=sep 18,2014=
added metal roof sheet to roof panel
[[File:MH4-rooflayer2top.skp]]
=sep 12, 2014=
updated roof panel with cross members on 24" centers.
[[File:MH4-rooflayer1bottom.skp]]
=sep 10, 2014=
did a rough idea for door frame, collecting more input for next revision.
[[File:MH4-moduledoor2x6.skp]]
[[Door_Requirement]]
=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
trying out the [http://fritzing.org/home/ fritzing] program for a new ceb controller board project. [https://docs.google.com/document/d/11deHuTHwnXVGwOAiGU-PDnJxmzbjP9ZpLYPTA-D4dCo/edit?pli=1 Andrew's notes for reqs]
[[File:Controllerbridge1.fzz]]
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.
[[File:Rockersmdbutton.skp]]
also have been looking over bunny's log for help [[James Slade Log]]
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.
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.
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
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
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
