#garfield Logs

Nov 29 2021

01:29 AM rue_bed2: I'v compared against a few design tools, looks like I'm in the right zone
01:37 AM rue_bed2: and it looks like I'm facing about 500mA input
01:37 AM rue_bed2: er, from the rectifier thats outputting 110VDC
01:37 AM rue_bed2: I'm sure I'm missing something
04:17 AM Tom_L: morning
04:18 AM rue_mohr: not slept yet :/
04:18 AM Tom_L: you workin today?
04:18 AM rue_mohr: yes...
04:18 AM Tom_L: umm....
04:19 AM rue_mohr: yes.
06:52 AM polprog: I fixed a head torch
06:52 AM polprog: The cable broke
06:52 AM polprog: I need to buy some length of cable for different stuff
06:53 AM polprog: I've resoldered the original cable but the insulation is so bad that its not flexible at all
06:53 AM polprog: Its a coiled cable so it breaks
09:29 AM aandrew: hm, maybe my horizontal expansion is a bit high. hole diameter should be 22mm, it is measuring 22.2mm
09:39 AM rue_mohr: castle
09:41 AM aandrew: I'm not even sure how to implement something like that
09:43 AM rue_mohr: you just draw two circles and alternate across 6 bisecting lines
10:46 AM aandrew: so the actual distances between bisection lines etc are not so important?
05:55 PM rue_mohr: no
05:55 PM rue_mohr: I usually do 3 protuding lobes
05:55 PM rue_mohr: 6 would be fine too
05:55 PM rue_mohr: just a sec
05:56 PM rue_mohr: https://www.thingiverse.com/thing:3834029
05:56 PM rue_mohr: see that one
05:56 PM rue_mohr: it fits in a pipe to act as a bushing for a pipe in it.
05:59 PM aandrew: hm
05:59 PM aandrew: it just seems this will reduce the "hold strength" to whatever it's fitted to
05:59 PM aandrew: so it's a tradeoff between ease of installation and hold strength
06:00 PM rue_mohr: did I tell you about the huge mean shredder that I dropped a peice of PLA into to chip up and it just ground to a halt instead?
06:00 PM aandrew: nope
06:01 PM aandrew: https://www.thingiverse.com/thing:3834029 <-- are you using those to basically fit the tubes together?
06:01 PM rue_mohr: yes
06:01 PM rue_mohr: for
06:01 PM aandrew: looks like it's intended to hold fast to both the outer and inner pipes
06:01 PM Tom_L: off early
06:01 PM Tom_L: up late
06:01 PM * Tom_L wonders about rue_mohr
06:01 PM rue_mohr: http://ruemohr.org/~ircjunk/projects/3rdarm/slide.htm
06:03 PM aandrew: ah ok so it is meant to slide
06:04 PM rue_mohr: mostly turn
06:04 PM rue_mohr: but if I have to press a bearing into something I do the same thing
06:04 PM rue_mohr: otherwise its always the wrong size
06:04 PM rue_mohr: you castle it like that and its just always good
06:23 PM aandrew: interesting, I am gonna have to play with this
06:23 PM aandrew: I tend to want to make the damn thing fit right instead of "cheat" even though the "cheat" is exactly the right way to go
06:27 PM Tom_L: rubber band tolerance
06:41 PM aandrew: hm?
07:02 PM Tom_L: castle
07:02 PM Tom_L: is rubberband tolerance
07:04 PM Tom_L: same idea as those printed 'linear bearings'
07:49 PM rue_mohr: aandrew, damnint, 11?
07:49 PM rue_mohr: god I need someone to help me get that thing finished
07:49 PM Tom_L: what? your supply?
07:51 PM rue_mohr: the hexapod
07:51 PM rue_mohr: the one I didn't start doing the major assembly on till "everything was ready"
08:27 PM Tom_L: ahh
08:27 PM Tom_L: cut one of the chip guards... nothing big
08:30 PM rue_mohr: oops
08:31 PM Tom_L: square hole for the rotary stepper
10:12 PM aandrew: Tom_L: not following; what is "rubberband tolerance"
10:13 PM aandrew: rue_mohr: yeah, 11y, crazy how time flies eh?
10:13 PM Tom_L: a very loose tolerance
10:13 PM aandrew: Tom_L: aha
10:15 PM Tom_L: seems a way of life for reprappers
10:34 PM rue_bed2: oh no, its not working here either
10:34 PM rue_bed2: damnit
10:49 PM rue_mohr: wtf