#garfield Logs

May 30 2020

12:10 AM rue_mohr: https://www.youtube.com/watch?v=mHAbShWQ7JI
12:16 AM rue_mohr: hmm
05:38 AM Tom_itx: https://www.youtube.com/watch?v=QlZWc3BFvHU
05:38 AM Tom_itx: it's pretty common
05:49 AM Tom_itx is now known as Tom_L
05:52 AM rue_mohr: ply is cheating
05:53 AM rue_mohr: z https://twitter.com/ComradeRobot/status/1253906681353789446
02:26 PM rue_mohr: ok, I have a bunch of primer bulbs to fix the weed eater
03:40 PM Tom_L: home brew or store bought?
03:45 PM rue_shop1: pretty sure its a home brew
03:45 PM rue_shop1: I'v posted that liek 3 times and each time z isn't here
03:49 PM Tom_L: you should post it when he _is_ here if you want him to see it
03:50 PM Tom_L: it _was_ pretty cool though
04:07 PM rue_mohr: I needed to put it here so I could find it
04:44 PM Tom_L: today's project: http://tom-itx.no-ip.biz:81/~webpage/cnc/Snapper/Knob1.jpg
04:44 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Snapper/Knob2.jpg
04:44 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Snapper/Knob3.jpg
04:47 PM rue_mohr: nice!
04:47 PM rue_mohr: milled threads eh?
04:47 PM rue_mohr: how many re-positions did it need?
04:47 PM Tom_L: 2
04:47 PM Tom_L: top n bottom
04:54 PM rue_shop1: did you do a jig?
04:55 PM Tom_L: a quick one
04:55 PM Tom_L: re'used one i already had on the vise
05:00 PM rue_shop1: :)
05:11 PM rue_mohr: waiting for pcb stands to print
05:33 PM aandrew: nice knobs
05:33 PM aandrew: rue_mohr: i got a set of those pcbite things. they're awfully expensive for what they are, but they are nice. I wouldn't buy them again though
05:36 PM polprog: i got myself two of these P6100 probes.. they are quite nice
05:50 PM aandrew: wait *milled* threads?
05:51 PM aandrew: not hole drilled and tappe?
05:51 PM aandrew: tapped?
05:52 PM Tom_L: it's a thing.
05:52 PM polprog: rue_mohr: https://bitbucket.org/OpCode-eu-org/stm32-examples/src/master/ ,if you need newer STM32 code/Makefile
05:54 PM Tom_L: aandrew, https://www.youtube.com/watch?v=JkAAWT7Nxd8
05:58 PM rue_mohr: polprog, what changed?
05:58 PM polprog: mostly cleanup iirc
05:58 PM rue_mohr: ah, building up a nice demo set too!
05:58 PM polprog: yep. its example code for an intro class
06:00 PM polprog: the actual Makefile is in utils/. its modified to use stm32flash over uart
06:00 PM polprog: and some cleanup of ldflags
06:06 PM polprog: gotta write a silly lab report tomorrow.. i wish i had time to finish the video thingy.. or mess with the vfd supply more
06:08 PM aandrew: Tom_L: holy cow that's awesome
06:08 PM aandrew: what do you use for cutting fluid?
06:08 PM Tom_L: cnc coolant
06:08 PM Tom_L: rustlick
06:08 PM aandrew: man oh man, sometimes I am envious of the single fellas
06:09 PM Tom_L: not single
06:09 PM aandrew: not specifically referring to you
06:09 PM aandrew: that wasn't in response to your video :-)
06:11 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/thread_mills/Mill_Holder_Steel1.jpg
06:17 PM aandrew: that is impressive milling. what kind of tool did you have to use when making that thread?
06:18 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/thread_mills/Thread_mill2.jpg
06:18 PM aandrew: Tom_L: so your used coolant+chips just collect into a container, presumably filtered? does your coolant get recirculated?
06:19 PM Tom_L: i catch what i can but it's a mist coolant system so most is wasted
06:19 PM aandrew: does that mean you have a thin coating of the stuff all over the general mill area?
06:20 PM Tom_L: usually
06:20 PM aandrew: heh
06:20 PM aandrew: you can tell I'm a milling newb
06:20 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Mill_Steel/Assembly/spindle_cooler/Mill2.jpg
06:20 PM Tom_L: the gallon jug is the coolant
06:22 PM aandrew: intersting the grainger website seems to show a pic of more green stuff
06:22 PM Tom_L: there are different kinds
06:22 PM aandrew: and, amusingly, my Fastenal account shows I have a $19k order in progress, it's actually supposed to be under $50
06:22 PM Tom_L: most i've seen is either white or the blue you seee
06:22 PM aandrew: I'm either getting a shitload of gloves or there is a website issue
06:24 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/Rustlick1.jpg
06:27 PM aandrew: *nods* noted.
06:38 PM rue_mohr: Tom_L, http://ruemohr.org/~ircjunk/tempimage/p1160297.jpg
06:38 PM rue_mohr: resistor subsitution box
06:38 PM rue_mohr: its comming along!
06:43 PM aandrew: son and I took apart an epson workforce printer I picked up out of one of those "recycle your e-waste here!" bins
06:43 PM aandrew: took about 45m to tear it down and harvest the good stuff
06:44 PM aandrew: got another two to tear down (an other workforce which was my wife's before we gave up and just got a B&W laser for her) and an old canon which served me flawlessly for 10y
06:45 PM aandrew: so I'll have two spare print heads for my 11x17 workforce. :-)
06:46 PM aandrew: the mechanical design of cheap printers always impresses me
06:47 PM aandrew: rue_mohr: when you melt down the HDDs, do you use an arbor press or osmething to push out the spindle motors? old drives you could dismantle them but the newer (<5y, maybe more) the spindle is part of the casing
06:50 PM rue_shop2: 4.5mm
06:51 PM rue_shop2: aandrew, I'm just gonna throw in the motors and all this time
06:51 PM rue_shop2: their too hard to get off
06:52 PM rue_shop2: it'll be a messy meltdown
06:52 PM rue_shop2: I might strain it or something
07:16 PM aandrew: rue_shop2: well the copper won't melt at alu temp so you can probably strain it pretty easily like you said
07:16 PM aandrew: and I think most steel alloys are also well above alu
07:17 PM aandrew: can you imagine the first smelters where they were just running that shit as hot as possible and stones started bleeding (copper extraction)
07:18 PM aandrew: must have been quite the story the first time
07:29 PM rue_shop1: I think it was an accident
07:29 PM rue_shop1: pit fires
07:29 PM rue_shop1: and then someone caught on
07:58 PM Tom_L: rue_shop1, fancy box you're getting there
08:19 PM rue_shop1: 6cm
08:19 PM rue_shop1: yea, its getting closer to just being a software project
08:52 PM aandrew: rue_shop2: you need a good airflow to hit copper melting temps don't you
09:03 PM rue_mohr: havn't done copper yet
09:03 PM rue_mohr: sometimes I throw some copper in with the alumuinum, the alloy has some benifits
10:00 PM rue_shop1: 7mm
10:18 PM rue_mohr: final bracket
10:39 PM rue_mohr: http://ruemohr.org/~ircjunk/projects/resistorbox/slide.htm <-- the resistor box so far
10:40 PM Tom_L: etch pens seem to work ok
10:42 PM rue_mohr: no
10:42 PM rue_mohr: the new ones dont
10:42 PM rue_mohr: the ink isn't thick enough
10:42 PM Tom_L: huh
10:43 PM rue_mohr: yea
10:43 PM rue_mohr: surprise
10:43 PM rue_mohr: they must use cheap ink on thm
10:43 PM rue_mohr: which kinda makes sense
10:44 PM rue_mohr: I been etching like crazy latley tho
10:44 PM rue_mohr: I'v realized that in most cases, its faster than protoboard
10:45 PM rue_mohr: less if there are more holes than traces
10:45 PM rue_mohr: or I dont know what I'm building yet
10:45 PM rue_mohr: the power supply was the holes case
10:45 PM rue_mohr: the controller was the dont know what I'm making case
10:45 PM rue_mohr: I ended up adding an io, and provisions for an eeprom
10:45 PM rue_mohr: I might need the eeprom for the lookup tables
11:40 PM zhanx: In Corpus Christi overnight on the way to SpaceX tour
11:42 PM rue_shop1: where is the link I keep posting for z when he's not here!
11:43 PM rue_shop1: wtf where did it go!
11:43 PM rue_shop1: damnit its gone again
11:43 PM rue_shop1: damnit damnit damnit
11:47 PM zhanx: Same place it was last time