#garfield Logs

Aug 06 2020

12:05 AM rue_mohr: "oh do it already" power supply
12:11 AM rue_mohr: just go with a linear power end... ok (twitch twitch)
12:11 AM rue_mohr: ... just go with a linear error amplifier... ok.... (twitch)
12:11 AM rue_mohr: control, just go with a pot
12:11 AM rue_mohr: OH CMON!!!!
12:11 AM rue_mohr: 18V 5A
05:07 AM polprog: heh. tried to reinstall that software yesterday night and it was more broken. good that i had a backup, ha
05:07 AM polprog: i think it works
05:08 AM polprog: i havent tried to compile anything on that image i made earlier
09:30 AM rue_mohr: I havn't had a chance to grab and play with it
01:16 PM polprog: rue_mohr: what are you smeting usually? aluminum?
01:16 PM Tom_L: yes
01:31 PM polprog: how does he deal with oxidation?
01:46 PM Tom_L: i dunno
01:47 PM Tom_L: http://ruemohr.org/%7Eircjunk/projects/smelter/
01:48 PM Tom_L: http://ruemohr.org/%7Eircjunk/projects/smelter/slide.htm
01:54 PM rue_shop1: bit of flux and degass, its all good
02:51 PM Tom_L: ok, i need to figure out how to make a broach in a pulley ID
02:51 PM Tom_L: keyway
02:52 PM Tom_L: tried one way with lower than acceptable results
02:53 PM Tom_L: the lathe is too worn
05:26 PM polprog: rue_mohr: oh, ok
05:31 PM Tom_L: https://imgur.com/gallery/Bia0WiB
06:22 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Test_keyway1.jpg
06:22 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Test_Keyway2.jpg
06:22 PM Tom_L: i need to come up with a better way to do that
06:23 PM Tom_L: that was on the lathe and it's worn out
06:23 PM Tom_L: using a piece of tool blank
06:23 PM Tom_L: and a scrap i had laying around that already had a hole
06:24 PM Tom_L: i may try to bolt it to the spindle column and try it on the mill
06:25 PM Tom_L: it's kinda crooked
06:58 PM aandrew: rue_mohr: what's gone wrong today
07:40 PM Tom_L: ok try #2 pic to come
07:46 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway3.jpg
07:46 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway4.jpg
07:46 PM Tom_L: better (top slot) than the one on the lathe (right)
07:47 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway5.jpg
07:47 PM Tom_L: elaborate setup:
07:47 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway6.jpg
07:47 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway7.jpg
07:48 PM Tom_L: now i'll make a tool holder to mount there
07:48 PM Tom_L: needed all the clamps or the tool would slip
07:50 PM ShopMoon: Hay rue_mohr you awake?
08:41 PM Tom_L: https://youtu.be/nIHpqqgybss?t=463
08:41 PM Tom_L: https://www.teamunlimbited.org/arms
09:59 PM rue_mohr: arg
10:00 PM rue_mohr: Tom_L, you can use the cnc as a shaper ya know?
10:01 PM Tom_L: i did
10:01 PM Tom_L: i gotta make a holder though
10:01 PM rue_mohr: ok
10:01 PM Tom_L: did you see the final pics?
10:01 PM rue_mohr: you can do it vertically too
10:02 PM rue_mohr: come down on the work
10:02 PM Tom_L: not as easy
10:02 PM Tom_L: too hard on the spindle and i wouldn't have been able to hold it in the chuck
10:02 PM rue_mohr: no, not with the single
10:02 PM rue_mohr: just attach to the Z axis
10:03 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/rotary/Broach/Test_Keyway7.jpg
10:03 PM Tom_L: i used the z axis to increment the cut
10:03 PM rue_mohr: yup
10:03 PM Tom_L: turned out alot better than on the lathe
10:04 PM rue_mohr: canned cycles!
10:04 PM Tom_L: i was thinking about a subroutine
10:04 PM rue_mohr: yea
10:04 PM rue_mohr: perfect application
10:04 PM Tom_L: back n forth in X then increment Z
10:04 PM rue_mohr: grbl cant
10:04 PM Tom_L: however many times it takes to get the depth
10:05 PM Tom_L: not much margin for error there though
10:05 PM Tom_L: it would hit some pretty solid parts
10:07 PM Tom_L: the lathe has enough slop in it, it kept wanting to dig into the part more than it was supposed to
10:10 PM rue_mohr: I made a broach once
10:10 PM rue_mohr: for servo horns
10:10 PM rue_mohr: (for plastic)
10:10 PM Tom_L: i may remember that
10:10 PM Tom_L: this was just a tool blank
10:10 PM Tom_L: i just touched the end with the grinder to put a nice sharp edge on it
10:11 PM rue_mohr: yup
10:11 PM rue_mohr: bit of rake
10:12 PM Tom_L: i'm glad i got that head
10:12 PM rue_mohr: :)
10:12 PM rue_mohr: https://www.youtube.com/watch?v=98MCz9gQaiE
10:13 PM rue_mohr: not how I'd have thought to do it
10:14 PM Tom_L: he's got the same head
10:14 PM Tom_L: looks like anyway
10:14 PM rue_mohr: is it? dividing heads aren't that much different
10:15 PM Tom_L: awfully close
10:15 PM rue_mohr: oh, I dont have a 60 degree tool
10:15 PM Tom_L: ? dovetail?
10:16 PM rue_mohr: the little metal bit with the < <
10:17 PM rue_mohr: ... upside down thread cut...
10:17 PM rue_mohr: hmmm chips...
10:17 PM Tom_L: oh, single point thread cutter
10:17 PM rue_mohr: ouch he lost one
10:19 PM Tom_L: you saw that 3tpi thread my bud cut for me?
10:19 PM Tom_L: that was interesting because of the coarse pitch and how fast it had to cut it
10:19 PM rue_mohr: hmm, no
10:20 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/temp/thread1.jpg
10:20 PM Tom_L: iirc 1.5" D
10:21 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/temp/thread.jpg
10:21 PM Tom_L: to replace that
10:21 PM rue_mohr: huh
10:21 PM Tom_L: i would have done wood but no live tooling and without it just chips the wood out
10:21 PM rue_mohr: chair?
10:22 PM Tom_L: 1800's square grand piano
10:22 PM rue_mohr: huh
10:22 PM Tom_L: was delivered in a covered wagon
10:24 PM rue_mohr: yt is going to lose people posting or watching videos with this ad rate
10:25 PM Tom_L: yeah
10:29 PM Tom_L: savage has alot of crap in his shop
10:29 PM rue_mohr: hahha you seen the images of mine right?
10:29 PM Tom_L: parts of it
10:30 PM Tom_L: by crap i meant equipment
10:30 PM rue_mohr: yep
10:30 PM rue_mohr: materials and rools
10:31 PM Tom_L: that was a waste of a good hunk of brass
10:31 PM rue_mohr: yea
10:31 PM Tom_L: i've got a chunk of bronze about that size
10:32 PM rue_mohr: bushing material!
10:32 PM Tom_L: one of em was a z counterweight on the sherline for a long time
10:32 PM rue_mohr: high cieling
10:34 PM rue_mohr: heh, cause of his oops, the hex sizes aren't the same
10:35 PM Tom_L: saw that
10:35 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/cnc/xtra/bunny.jpg
10:37 PM rue_mohr: Tom_L, and
10:37 PM rue_mohr: https://imgur.com/gallery/Bia0WiB
10:37 PM rue_mohr: that is a fire noodle if I ever saw one
10:37 PM Tom_L: heh
10:37 PM Tom_L: lotsa forces there
10:38 PM rue_mohr: I didn't think you could do a spring hot like that
10:39 PM rue_mohr: maybe it gets post-treated
10:39 PM Tom_L: they re'temper it
10:39 PM Tom_L: probably a couple diferent times
10:39 PM Tom_L: one to harden it and another to toughen it
10:40 PM rue_mohr: I wonder why they dont have it retract it more
10:40 PM Tom_L: there's a shop near me that does big springs
10:40 PM Tom_L: there may still be another one that winds all sorts of custom springs (smaller)
10:41 PM rue_mohr: me and the other sprayer guy were talking
10:41 PM rue_mohr: since we made springs from the music wire
10:41 PM rue_mohr: we havn't seen a single one come back broken
10:41 PM rue_mohr: that was one of the leading failures with the other guys makes
10:42 PM Tom_L: https://www.atlasspringandaxle.com/
10:42 PM rue_mohr: that and the front head metal fatiuge
10:42 PM Tom_L: what ga wire?
10:42 PM Tom_L: i've wound all sorts of springs from piano wire
10:42 PM rue_mohr: since we removed the front tabs on the head, the metal fatiuge failrues have gone away
10:43 PM rue_mohr: hmm, its by size
10:43 PM Tom_L: i remember that
10:44 PM Tom_L: i can get just about any size up to around 22 23 ga
10:44 PM Tom_L: but that wire ga is different from normal wire ga
10:44 PM rue_mohr: 0.055
10:45 PM rue_mohr: so, on the repairs
10:45 PM rue_mohr: were seeing the heads actually wear out
10:46 PM rue_mohr: from friction with the cans
10:46 PM rue_mohr: and 2 failures of the bicycle link were using
10:47 PM Tom_L: .055 is #24 piano wire
10:48 PM Tom_L: i can get up to .112"
10:48 PM Tom_L: #36
10:49 PM Tom_L: failure after how long?
10:57 PM Tom_L: what were you making the springs from before?
10:58 PM Tom_L: the can material is harder than the aluminum so it makes sense the aluminum would wear out
11:20 PM rue_mohr: before we were straightening the ends of precoiled springs
11:21 PM rue_mohr: the last guy seems to have been too
11:21 PM rue_mohr: there were fatiuge points, they would snap
11:21 PM rue_mohr: the new ones are fine tho
11:21 PM rue_mohr: did you see the jig I made for coiling them on the (unpowered) lathe?