#garfield Logs

Dec 28 2020

12:00 AM Tom_L: less because i'm increasing the feeds by a factor of 3
12:13 AM Tom_L: made a tool file for brass too
12:14 AM Tom_L: brought the spindle time down to 10 min
10:19 AM polprog: im UTC+1
10:20 AM rue_mohr: ?
10:21 AM Tom_L: i was asking yesterday
10:32 AM Tom_L: https://partsdr.com/
10:32 AM Tom_L: rue_mohr, if you need a part
10:34 AM rue_mohr: funny the front page image is a failing front-load, I'm sure there is a joke in there
10:35 AM rue_mohr: "We noticed that you are searching from Canada. We love our Canadian friends, but did want to let you know that we don't accept payment from non US billing addresses or ship outside the US. Hopefully this saves you later frustration."
10:35 AM Tom_L: huh
10:35 AM rue_mohr: its typical
10:35 AM Tom_L: well there are ways around that too if you can't find something at a decent price
10:36 AM rue_mohr: bets they wont ship to alaska either
10:36 AM Tom_L: i've dealt with them several times
10:38 AM Tom_L: parts for the dishwasher too which i no longer use
10:39 AM rue_mohr: except non-2020 christmas gatherings
10:39 AM Tom_itx: https://partsdr.com/part/w10435302-tub-bearing-shaft-seal-kit?model=WTW8500BR0
10:39 AM Tom_L: that was one kit i got
10:39 AM Tom_L: and it's always only one bearing
10:39 AM rue_mohr: I'm not even sure of the contruction of mine
10:40 AM Tom_L: the one under the seal
10:40 AM Tom_L: i think the seal leaks and it rusts
10:41 AM Tom_L: once in a while the screw comes loose that holds the F&P motor together and it loses power to spin
10:43 AM rue_mohr: I dont think mine has any flooded moving seals
10:44 AM Tom_L: is it making funny noises?
10:44 AM rue_mohr: no
10:44 AM Tom_L: mine gets used alot more too i'm sure
10:45 AM Tom_L: minimum once a day
10:45 AM rue_mohr: mine runs maybe 2times/week average
10:46 AM Tom_L: i think packing grease in that seal has helped
10:46 AM Tom_L: packed to the point it oozed out when pressed in
10:49 AM rue_mohr: polprog, did you get that schematic I posted here?
10:50 AM Tom_L: program ready to go cut
10:51 AM rue_mohr: I'm interested in how that bottom threading from the top goes
10:51 AM polprog: yeah i did
10:52 AM polprog: ill build it tonight
10:52 AM rue_mohr: if you could adjust the ratio to 5:5.7 you could get 5V out
10:52 AM polprog: gotta go to a building store get some plaster and plasterboard to fix up the ceiling
10:52 AM rue_mohr: but its a compact little circuit!
10:52 AM polprog: it is!
10:53 AM Tom_L: i also made a 'brass' tool job file i will update from steel as the tools get used
12:26 PM aandrew: not sure if this is up polprog's alley or not: https://www.youtube.com/watch?v=ZBsv-jRiIT8
01:32 PM Tom_L: rue_mohr,
01:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Jacobs_chuck/Chuck_adapter1.jpg
01:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Jacobs_chuck/Chuck_adapter2.jpg
01:36 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Jacobs_chuck/Chuck_adapter3.jpg
01:36 PM Tom_L: https://www.youtube.com/watch?v=Y_WWPBGEfIA
02:10 PM aandrew: someone done gone milled a bit circle in your vice jaws there, Tom_L
02:24 PM Tom_L: yep, that's what i make em for
03:31 PM polprog: aandrew: haha, awesome
03:32 PM rue_mohr: I cant tell is its running true
03:32 PM rue_mohr: you did it all from the top, right?
03:34 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Jacobs_chuck/Chuck_adapter4.jpg
03:34 PM rue_mohr: the outside looks eccentric, but did the threads work?
03:34 PM Tom_L: yup
03:34 PM Tom_L: it's not perfect but good enough to use for a drill
03:34 PM Tom_L: so now i can quick change drills
03:35 PM Tom_L: grab another chuck for the spare adapter
03:35 PM Tom_L: got a couple set screws from the hdwe store
03:35 PM Tom_L: so i have a hex to hold while tightening em
03:35 PM rue_mohr: k, how close IS the alignment? if you run a dial to the chuck?
03:36 PM Tom_L: .010 runout overall on a drill shank
03:36 PM Tom_L: +-5
03:36 PM rue_mohr: huh
03:36 PM Tom_L: it's just best done on a lathe
03:37 PM Tom_L: but this i think will be acceptable
03:37 PM rue_mohr: the ones you did before were +-2 tho, weren't they?
03:37 PM Tom_L: for drilling
03:37 PM Tom_L: i think they were worse than that
03:37 PM rue_mohr: k
03:37 PM Tom_L: i don't remember
03:37 PM rue_mohr: trying to remember the video
03:37 PM Tom_L: the ones i drilled for a specific drill may have been closer
03:38 PM rue_mohr: but, I think you had the dial on the outside of it, not a drill shank
03:38 PM rue_mohr: hmmmmm
03:38 PM Tom_L: https://www.youtube.com/watch?v=5QcYX240U2I
03:39 PM Tom_L: yeah that one was ok
03:39 PM Tom_L: for a thread mill
03:39 PM Tom_L: i use it
03:39 PM Tom_L: that one was pretty close
03:41 PM Tom_L: once i ran them thru, takes 10 min spindle time to make one
03:41 PM polprog: we were in the building supplies store today to buy some plasterboard and plaster to fix a hole in the ceiling
03:41 PM Tom_L: that's manually changing tools too
03:41 PM polprog: i fixed it up, dad also bought me a cordless drill
03:41 PM polprog: it's a nice one, 18V
03:44 PM rue_mohr: :)
03:45 PM polprog: it's got a hammer drill function too
03:54 PM polprog: i wonder if i can use it with my machine taps
04:10 PM polprog: that function gen i got it 6MHz
04:10 PM polprog: not bad
06:23 PM Tom_L: rue_mohr, thanks for the idea
06:51 PM rue_shop1: shop needs a larger scrap metal bin
06:51 PM rue_shop1: stripping down one of the 6 printers I need to get disolved
06:51 PM rue_shop1: this one has 3 DC servomotors
06:51 PM rue_shop1: big ones
06:54 PM rue_shop1: Tom_L, np, whats next project then!?
06:55 PM Tom_L: hard to say
07:10 PM rue_shop1: huh
07:10 PM rue_shop1: and comes with a bunch of L290 and L291
07:10 PM rue_shop1: I dont know if I have ever noticed the contents of an L291 before... there is a 5 bit DAC
07:24 PM rue_mohr: polprog, nice on the zip drive, what was wrong with it?
07:24 PM rue_mohr: ah there
07:46 PM polprog: the window was buste
07:46 PM polprog: d*
07:46 PM polprog: its a pain to open it, the snappy snaps snapped
07:46 PM polprog: i have to tape it around so its not loose >_>
07:46 PM polprog: decided to take some pics of the insides because i dont wanna open it anymore
07:47 PM rue_mohr: :)
08:43 PM polprog: what's that L291B L290B ?
08:49 PM rue_mohr: their closed loop specific motor chips
08:50 PM rue_mohr: one of them is 5 bit DAC and op-amp
08:50 PM rue_mohr: the other is freq -> voltage & a bit
08:50 PM rue_mohr: the L292 has pwm provisions in it
08:50 PM polprog: dac op-amp?
08:51 PM rue_mohr: yea, so you can use the DAC for your setpoint and the op-amp for the analog error
08:51 PM polprog: huh, neat
08:53 PM aandrew: rue_mohr: that must have been a really old fancy printer if you got servos that big out of it
09:03 PM rue_mohr: well, servomotors
09:03 PM rue_mohr: loop controller sold seperatly
09:03 PM rue_mohr: tho, the driver board looks pretty generic
09:05 PM rue_mohr: the next two to strip down are big label printers
09:05 PM rue_mohr: I'd like to have them as label printers, but they have a fancy protocol that it doesn't look like I can just use
09:06 PM rue_mohr: they too have some nice motors, not as many
09:07 PM polprog: nighters
09:07 PM rue_mohr: but their going to rust away if they stay where they are
09:39 PM rue_shop1: hmm 1 nice motor
10:11 PM rue_shop2: glad I have that forward converter circuit, the encoders on those motors take +12V and -12V
10:11 PM rue_shop2: !?!?!
10:12 PM rue_shop2: oh it gets stranger
10:12 PM rue_shop2: they dont use the ground
10:14 PM rue_shop2: oh they run power thru the shield, of course
10:28 PM rue_shop1: WTF
10:29 PM rue_shop1: OMG the signal is awefull
10:29 PM aandrew: heh
10:29 PM aandrew: so I discovered something that you guys probably already know
10:29 PM aandrew: that UV curable glue is pretty expensive
10:30 PM aandrew: but you can get a half litre of UV "ink" for photopolymer printers and a bag of cheap disposable pipettes for under $30 and have enough quick-dry UV glue to last for a long damn time
10:36 PM rue_mohr: it kicks off on its own over time...
10:36 PM rue_mohr: but hmmm
10:43 PM aandrew: sure, but not THAT fast
10:43 PM aandrew: and if you keep it dark and dry it should last a pretty long time
10:43 PM aandrew: I can't believe how well it worked too
10:48 PM aandrew: lol
10:48 PM aandrew: "Experienced developer deploys hotfix on production", oil on canvas: https://classicprogrammerpaintings.com/image/613838825589030912
10:57 PM aandrew: also lol: perhaps putting the temp/humi sensor on top of the freezer in the garage wasn't the best location: https://imgur.com/a/oUSuFjh
10:57 PM Tom_L: rue_mohr, what sort of label printers?
11:20 PM rue_mohr: thermal
11:20 PM rue_mohr: for big labels, the machine is about12" x 18" by 10" high
11:20 PM Tom_L: mmm those prints don't last long
11:21 PM Tom_L: they fade out don't they?
11:21 PM rue_mohr: no
11:21 PM rue_mohr: thats a good point
11:21 PM Tom_L: what are the ones that fade?
11:21 PM Tom_L: like receipt printers
11:21 PM rue_mohr: thermal
11:23 PM Tom_L: i didn't check the runout on that 2nd part yet
11:32 PM rue_mohr: awe gee, hmm
11:32 PM rue_mohr: not sure how to end the say
11:33 PM rue_mohr: the printer really had 1 good stepper motor in it, (the label printer) so, I'm not entirely motivated to strip down the other one
11:33 PM rue_mohr: a lot of it can rot away before the motor takes on any corrotion