#garfield Logs

Mar 05 2021

12:15 AM rue_mohr: hmm
01:02 AM aandrew: ok so client three is now out of the woods, still have work to do on it but I've got a good handle on it
07:02 PM rue_mohr: I see
07:12 PM Tom_itx: so.
07:12 PM Tom_itx is now known as Tom_L
07:12 PM rue_mohr: oh damnit
07:12 PM Tom_L: sry i take it all back
07:12 PM rue_mohr: I was supposed to jump on irc @ work and get your pp info again
07:13 PM rue_mohr: I have a list of things to remember that only come up when I cant do them
07:13 PM rue_mohr: I'll keep tryin
07:14 PM Tom_L: mmm
07:14 PM Tom_L: i'm not in a panic about it
07:15 PM Tom_L: i can txt it to you
07:15 PM Tom_L: 5934?
07:21 PM rue_mohr: what be it?
07:22 PM Tom_L: a # i had for you maybe no good
07:23 PM Tom_L: dunno where i got it either :)
07:23 PM rue_mohr: 5934 is landline
07:24 PM rue_mohr: I dont have a cell
07:24 PM Tom_L: O
07:24 PM rue_mohr: I just have the work cell
07:24 PM Tom_L: see if that works
07:26 PM rue_mohr: yup
07:26 PM rue_mohr: make me go all the way to the livingroom....
07:26 PM Tom_L: next time you panic, guess you can call that :)
07:26 PM rue_mohr: haha
07:27 PM Tom_L: so all you have is a land line?
07:27 PM rue_mohr: I'm trying to not put everyone in town on in the address book, out of town would be a different level, out of country is a few steps over that
07:27 PM rue_mohr: yes
07:27 PM rue_mohr: the cell lives in the livingroom cause there is no reception around here
07:27 PM Tom_L: ahh
07:28 PM Tom_L: my book is long but handy
07:28 PM rue_mohr: I used to have a pay-and-talk, but I never used it and after a while they just empty your time
07:28 PM Tom_L: every time someone asks me i generally have the number
07:29 PM rue_mohr: most of the people in town know me
07:29 PM Tom_L: i never answer the land line anyway. too many crap calls
07:29 PM rue_mohr: so, its a challange
07:29 PM rue_mohr: I have a phone system on my land line
07:29 PM rue_mohr: you have to dial an option to get thru
07:29 PM Tom_L: yeah we know, it keeps dying doesn't it?
07:29 PM Tom_L: oh
07:30 PM rue_mohr: the computer that runs it...
07:30 PM rue_mohr: has killed...
07:30 PM rue_mohr: 7 hard drives..
07:30 PM rue_mohr: a power supply,
07:30 PM rue_mohr: and 3 motherboards
07:30 PM Tom_L: wonder why
07:31 PM rue_mohr: the lemons have to end up somewhere
07:33 PM rue_mohr: oh drat, I meant to buy the materials for the test cage today
07:38 PM rue_mohr: well, the sping inspiration is starting to get to me
07:38 PM Tom_L: good
07:39 PM Tom_L: i think
07:39 PM Tom_L: shop is thawed out. i'm ready for a few projects
07:46 PM rue_mohr: hmm
07:46 PM rue_mohr: if I use a 3d printed rack gear
07:47 PM rue_mohr: how could I close-out play
07:47 PM rue_mohr: (long linear drives)
07:48 PM Tom_L: how you gonna print a long rack?
07:49 PM rue_mohr: not
07:49 PM rue_mohr: sections
07:49 PM Tom_L: which is cheaper printer plastic or open ended timing belt?
07:49 PM rue_mohr: printer plastic!!!!
07:49 PM rue_mohr: the big belt is crazy expennsive
07:50 PM Tom_L: how big a belt do you think it would take?
07:50 PM rue_mohr: I'd want ateast 1" wide with 4tpi
07:51 PM rue_mohr: ~4tpi
07:51 PM rue_mohr: 8' of that seems to average about $100-$300
07:57 PM Tom_L: design interlocking rack
07:58 PM Tom_L: so they won't have a gap between pieces
08:12 PM Tom_itx: damn router
08:17 PM Tom_itx is now known as Tom_L
10:42 PM rue_mohr: ClosetMoon, you come back from living in the forest yet?
10:43 PM rue_mohr: polprog, I'm gonna work on stabalizing amplifiers
10:43 PM rue_mohr: is everyone in the world dead?
10:44 PM Tom_L: just kickin back here
10:46 PM rue_mohr: hmm
10:46 PM rue_mohr: aparently I'm stirring
10:48 PM rue_mohr: where did I get with the servomotors for the plasmacutter?
10:51 PM rue_mohr: I wonder what happens if I take wakeup pills when I'm alraedy awake
10:52 PM rue_mohr: I wonder if thats like giving a squirrel coffee
10:53 PM Tom_L: :)
10:56 PM rue_mohr: ok you know what might be interesting, is to put an encoder on a stepper motor (as a jig) and see JUST what the performance IS like
10:56 PM rue_mohr: cause, its really hard to make a dc servo, stepper emulator when you dont have a performance target
10:57 PM rue_mohr: latency is one of the things I'd really like to know more about
10:57 PM rue_mohr: 400 line encoder, hmm
10:57 PM Tom_L: that's what makes the mesa cards attractive is you can get away with alot more latency with them
10:57 PM rue_mohr: quadrature thats 1600
10:58 PM rue_mohr: but I'm talking at a driver/motor level
10:58 PM rue_mohr: aka, when you step a stepper, what is the delay and motion profile like
10:58 PM rue_mohr: for one step
10:58 PM rue_mohr: nobody could answer that
10:58 PM rue_mohr: mostly becasue is was explicity stated that nobody cared
10:59 PM rue_mohr: if I set a stepper driver to 8 microsteps
11:00 PM rue_mohr: so, 400ppr encoder is 1/1600 of a rev
11:00 PM rue_mohr: stepper at 1.4 degrees
11:01 PM rue_mohr: how about 1.8
11:01 PM rue_mohr: see, thats 1/1600 rev right there
11:01 PM rue_mohr: 1.8 degrees at 8 microsteps
11:01 PM rue_mohr: so I might get delay info, but I need more resolution
11:02 PM rue_mohr: maybe if I add a belt coupling to ratio the encoder up
11:02 PM rue_mohr: but that adds all sorts of junk
11:03 PM rue_mohr: I could do full stepping
11:03 PM rue_mohr: I should get 8 pulses per step
11:03 PM rue_mohr: I should see if I have a finer encoder
11:04 PM rue_mohr: the ones from the HP printers might be better
11:04 PM rue_mohr: I think they are 1800ppr
11:05 PM rue_mohr: so how do I capture the data
11:05 PM rue_mohr: maybe a 4 bit counter on the salee capture box
11:05 PM rue_mohr: I'm going to need food
11:06 PM Tom_L: i need sleep
11:07 PM Tom_L: not many there right now that could answer that
11:07 PM rue_mohr: I know
11:07 PM rue_mohr: everywhere I go its like talking to a wall
11:07 PM rue_mohr: seemingly always :/
11:07 PM Tom_L: it's been hit an miss over there for some time
11:08 PM rue_mohr: everywhere
11:08 PM Tom_L: mostly just crap chat
11:08 PM rue_mohr: everyone is dieing, there are almost no humans left
11:08 PM rue_mohr: its all bots
11:08 PM Tom_L: well i'm not gettin younger but i'm here
11:08 PM rue_mohr: :)
11:10 PM Tom_L: https://patents.google.com/patent/US7239108B2/en
11:12 PM Tom_L: i give up for tonite
11:12 PM rue_mohr: meh
11:12 PM Tom_L: can't keep my eyes open or focused
11:14 PM rue_shop2: goodbye