#garfield Logs

May 02 2021

12:44 AM rue_mohr: ok helped a fellow i know move aphone jack
12:50 AM rue_mohr: work stuff on non work bleck
03:43 AM rue_bed: oo I'm tired
12:18 PM rue_bed: I need to do up the battery spot welder
12:18 PM rue_bed: tabbing
12:32 PM aandrew: https://www.thingiverse.com/thing:21057 <-- printed off 8 of these at ~65% scale. Decent little hold-down clamps with the right captive bolt
02:02 PM aandrew: also # urls-horrible.sh - Belt out horrible urls. Why? Eat shit.
02:02 PM aandrew: er
02:02 PM aandrew: lol
02:03 PM aandrew: https://www.thingiverse.com/thing:3375623 <-- this is a REALLY nice knob. 3/8" is way way too big for what I need but I am now printing a 63% scaled version to see if it'll do an M6 bolt nicely or if I have to be more creative
02:04 PM Tom_L: no, this is a really nice knob :) http://tom-itx.no-ip.biz:81/~webpage/cnc/Snapper/Knob1.jpg
02:05 PM aandrew: that is
02:05 PM aandrew: however that's beyond my capabilities to manufacture
02:06 PM Tom_L: time to step up your game
02:06 PM Tom_L: even rue has a cnc
02:08 PM Tom_L: that is nice though
02:08 PM Tom_L: i'd hotglue the top plug in probably
02:17 PM aandrew: I have a little 3018 I have yet to do anything with
02:17 PM aandrew: getting close to time to use it
02:17 PM aandrew: I'm actually printing the knob and hold downs FOR the 3018
02:17 PM aandrew: the bed of the 3018 has t-slots but I put a spoilboard on it and that has captive M6 nuts so I need to use M6 bolts with knobs on them to clamp things down
02:22 PM aandrew: I have absolutely no use for a 3/8" knob but I'm really liking it. it's got a great feel in my hand
02:23 PM aandrew: 0.24mm layer height is a little granular but really does not bother me
02:48 PM rue_mohr: you saw the 10-32 embedded print I had on thingiverse?
03:03 PM aandrew: don't think so no
03:03 PM aandrew: I can't embed though, I have to use a bolt since the nut is in the spoil board
03:11 PM rue_mohr: so have it build up a dummy tube to drop the bolt tip-down in
04:20 PM rue_shop1: ......................................................................................................................................................................................................................................................................................................................................................................................................................................................
04:20 PM rue_shop1: .....3.
04:29 PM rue_shop1: wtf, cat sitting on the keyboard?
06:40 PM Tom_L: alot of fill in the blanks
07:20 PM rue_shop1: well I got one of the disability carts stripped down
07:20 PM rue_shop1: I have two right angle drive motors for the cnc
07:35 PM Tom_L: nice
07:35 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1190417.jpg
07:35 PM rue_mohr: I think I know how to deal with the lash
07:35 PM rue_mohr: simple double the number of motors and have them kinda track, but with tension
07:59 PM rue_mohr: I have two more carts I can strip, I think I will leave one togethor (I set one up to be a robot to take out the garbage)
08:17 PM aandrew: boo. I forgot that you can't connect an r/c receiver directly to an h-bridge
08:18 PM aandrew: the recevier spits out x channels of PWM and bidirectional is 0-1024 with 512 being stopped, where the h-bridges all have IN1/2 and you have to toggle polarity to get the motor to run the other way
08:19 PM aandrew: a little mcu doing PWM input and outputting the "corrected" PWM along with EN1/2 will work, I just forgot about it
08:34 PM Tom_L: yeah all channels are piled up on the signal
09:13 PM rue_shop1: what?
09:14 PM rue_shop1: I think I have a tiny13 for doing that
09:14 PM Tom_L: on an rc transmitter
09:14 PM rue_shop1: tx?
09:14 PM rue_shop1: says rx
09:15 PM aandrew: yeah on rx; you receive a pwm 0-1023 with 511 being 'zero' - anything less the PWM should be passed on with the hbridge in1/in2 set for "backward" and > 511 the h-bridge in1/in2 set for "forward"
09:15 PM aandrew: pretty easy to do, I just didn't have something readily available to do it
11:01 PM rue_mohr: :) ask me for weird adapter software like that, I might already have it from time to time
11:11 PM aandrew: heh
11:11 PM aandrew: I fell down a rabbit hole about C64's PLA and its failure modes and replacements
11:11 PM rue_mohr: heh
11:11 PM rue_mohr: since when you dig into the retro thing?
11:13 PM aandrew: I've always had a love for C64s, it was my first computing experience, around age 5 or so. instantly hooked
11:13 PM rue_mohr: :)
11:13 PM aandrew: but generally I don't do much with retrocomputing except to reminisce
11:14 PM rue_mohr: the z80 thing is kinda that
11:14 PM rue_mohr: I'd like to finish my old projects
11:14 PM aandrew: oh man if I had to finish my old projects I'd be busy for 50 years I think
11:15 PM rue_mohr: I feel like at some point I fell off the horse, I'm retracing
11:15 PM rue_mohr: I got the tiny85 clock gen working, and just installed it
11:15 PM rue_mohr: everything is working
11:15 PM rue_mohr: and now I have the clock for the uart
11:16 PM rue_mohr: next step is to install a 8254
11:16 PM rue_mohr: as two uart baud dividers and a tape counter
11:29 PM aandrew: nice