#linuxcnc Logs

Jun 07 2021

#linuxcnc Calendar

12:50 AM randy: morning.
04:28 AM Tom_L: morning
05:39 AM JT-Cave: morning
05:39 AM XXCoder: morning
07:23 AM Tom_L: good chance of rain today
07:25 AM JT-Cave: and for the rest of the week here
08:01 AM JT-Cave: https://forum.linuxcnc.org/20-g-code/42707-g-code-generators?start=10#211418
09:20 AM JT-Shop: that spoiled kid from Brazil wants to order more boards lol, after all the crap he called me it ain't going to happen!
09:25 AM * Loetmichel finally got the side channel blower mounted on the company wall for the two CNC-mill vacuum tables. Took not even two hours before the neighbor called "Thats a bit loud..." walked out. "Oh."... true, i should have knownthat 2kw threephase blower with -300mbar and a few m^3 per minute has quite a bit of exhaust. Maybe i shoulnd have simply set a 2" plastic tube outside and call it
09:25 AM * Loetmichel a day. I now have ordered a car muffler and a 90° knee tube to mount it. :)
09:26 AM Roguish: can you guys send Cal some of your rain? we're dry as a popcorn fart.
09:36 AM Loetmichel: Roguish: if that were possible: with pleasure. we had about 3 inches here last week. its starting to get a bit annoying.
10:01 AM Roguish_shop: Loetmichel, thanks. but we really don't have a drought problem. we have 2 other problems. first is we are really, really stupid on using the little water we have. second, more important and way biggger is WAY TO MANY PEOPLE.
10:26 AM htasta: hi
10:31 AM CloudEvil: Soylent aqua.
10:32 AM Loetmichel: more like: Californians, the new fremen. @ CloudEvil
10:34 AM CloudEvil: https://www.npr.org/2021/06/04/1003387944/a-single-california-fire-killed-10-of-the-worlds-giant-sequoia-trees?t=1623079230289 :/
10:55 AM -!- #linuxcnc mode set to +v by ChanServ
11:18 AM Roguish_shop: and Cal is not the only place. realistically, it's the entire world issue. too many humanoid......
11:18 AM Roguish_shop: the sequoias will outlive humans easily....
11:20 AM CloudEvil: Not if they're all logged/burned
11:41 AM Loetmichel_ is now known as Loetmichel
12:40 PM Tom_L: JT-Shop, got the pocket working i see
01:12 PM CaptHindsight[m]: I did not know that camshaft grinding was considered such a black art by the auto community
01:12 PM Tom_L: oh?
01:14 PM andypugh: It’s not trivial.
01:14 PM andypugh: The interaction between the shape of the cam and the follower means that it’s hard to get the profile.
01:15 PM andypugh: Even with a flat follower the contact point isn’t under the cam axis.
01:15 PM andypugh: Is anyone in the UK (or EU) on the lookout for a cheap 5C collet lathe chuck?
01:15 PM andypugh: https://www.amazon.co.uk/3911-125-Hardware-Accessory-Industrial-Accurancy/dp/B08D9L7GY8
01:16 PM andypugh: A friend just bought one, and got it for that price.
01:16 PM Tom_L: i remember you questioning if it was any good
01:17 PM andypugh: Not that one, I don’t think.
01:17 PM andypugh: I paid almost exactly 10x that price.
01:19 PM Tom_L: so now we're stuck chatting between at least 2 channels :/
01:23 PM Tom_L: 12:42 PM andypugh: This seems too cheap to be true? https://www.amazon.co.uk/3911-125-Hardware-Accessory-Industrial-Accurancy/dp/B08D9L7GY8
01:24 PM andypugh: Indeed. But a friend ordered one on Saturday and it arrived today.
01:24 PM Tom_L: have you seen it yet?
01:24 PM andypugh: I have seen a photo.
01:24 PM andypugh: It exists...
01:24 PM Tom_L: heh
01:25 PM Tom_L: does seem rather cheap
01:38 PM andypugh: We thing that they missed of a 1 at the beginning, or put the decimal radix in the wrong place.
01:42 PM CloudEvil: https://smile.amazon.co.uk/s?k=3911-125&i=diy&ref=nb_sb_noss
01:42 PM CloudEvil: Alternate hypothesis is that someone put in a towel rail holder of the same part number, and they're price-matching
01:54 PM CaptHindsight: https://msimg.blob.core.windows.net/product/LNT30180904.jpg the gear is pretty close to the bearing journal
01:57 PM CaptHindsight: I have considered a CNC grinder for small runs/hobby
01:57 PM CaptHindsight: there are several already proven profiles but the bearing journals and some oil ports in them are what keeps some engines from getting any aftermarket attention
01:57 PM CaptHindsight: some have swapped cams and used bearing spacers since earlier versions of the engines had the lobes in all the right places but the journal size got larger over time
01:59 PM CloudEvil: It seems tractable, though the heat treatment may be a bitch.
02:01 PM CaptHindsight: yeah depends on what you want out of it
02:01 PM CaptHindsight: some harden just the out surfaces, some harden the whole cam
02:01 PM CaptHindsight: out/outer
02:03 PM CloudEvil: 'crappy' solutions like casenit might even work for one-offs.
02:04 PM CloudEvil: k
02:05 PM CaptHindsight: was thinking mainly for roller lifter applications
02:05 PM CaptHindsight: flat tappet does make things more complicated
02:06 PM CaptHindsight: the older engines here are pretty well covered
02:06 PM CaptHindsight: with aftermarket parts
02:07 PM CaptHindsight: cam and lifters for only $300
02:17 PM JT-Shop: I'm guessing the replacement servo is not going to be plug and play
02:22 PM * JT-Shop wonders why he can't jog the mill when not homed???
02:23 PM CaptHindsight: pesky config settings
02:23 PM JT-Shop: I thought you could jog before homing all the time...
02:31 PM JT-Shop: plasma I can jog before homing...
02:33 PM skunkworks: can you jog with the keyboard?
02:35 PM JT-Shop: didn't try that
02:38 PM JT-Shop: left/right arrow makes spindle override move up and down as well as pg up and pg dn
02:39 PM JT-Shop: power button does turn the drives on and the shaft is solid
02:40 PM skunkworks: With joint/axis - I think you have to connect the counts and such to both joints and axis for it to jog before homed..
02:40 PM JT-Shop: the plasma is running 2.8 and I don't recall doing that but I've slept since then
02:55 PM CaptHindsight[m]: yeah, said i was connect but dropped me about an hour ago
02:55 PM CaptHindsight: and the bridge is back!
02:56 PM CaptHindsight[m]: but only simplex from Matrix to Libera right now
03:02 PM rs[m]: * somethings going on with the matrix irc bridge
03:02 PM rs[m]: somethings going on with the matrix irc brige
03:11 PM CaptHindsight: yeah about an 8 minute latency right now :)
03:11 PM JT-Shop: hmm the encoder is going the right direction but after powering up the servo jumps and I get a following error...
03:36 PM Tom_L: i just upgraded to 2.8.1 and i can jog before homed
03:36 PM Tom_L: no rain yet either btw...
03:36 PM Tom_L: lies!
03:38 PM JT-Shop: swap x and y cable and I get the run away on y with the replacement servo so not the drive
03:53 PM Tom_L: amp get nailed too?
03:53 PM Tom_L: err nevermind :)
03:54 PM Tom_L: broken wire at the encoder?
03:55 PM JT-Shop: encoder goes the right way when I turn the shaft
03:56 PM JT-Shop: same issue if I connect it to Y axis, run away and fault out from following error
03:56 PM Tom_L: odd
03:56 PM Tom_L: i certainly no very little if nothing about servos
03:59 PM Tom_L: have you _tried_ swapping direction on the encoder?
04:08 PM JT-Shop: no, the dro reads correctly
04:10 PM CaptHindsight: IF no software was changed it might be a loose coupling, poor encoder signal, unexpected amount of extra load etc
04:11 PM CaptHindsight: since it suddenly is one more than one axis it might be noise, poor power etc
04:12 PM JT-Shop: it's only the replacement servo the other two work fine
04:12 PM CaptHindsight: is on one more than one axis
04:12 PM JT-Shop: I damaged the tacho on the x and got another servo but it acts like the tacho is not working no matter what axis I plug it into
04:13 PM CaptHindsight: "replacement" but how close to the original servo?
04:13 PM CaptHindsight: bad replacement?
04:13 PM JT-Shop: same part number...
04:13 PM JT-Shop: looks to be a newer version...
04:13 PM CaptHindsight: "got another servo but it acts like the tacho is not working no matter what axis I plug it into"
04:13 PM JT-Shop: hmm
04:14 PM CaptHindsight: ^^ on the new servo?
04:14 PM JT-Shop: yeah
04:15 PM CaptHindsight: can you verify that the new "tach" works?
04:15 PM CaptHindsight: or is that it, you have and there is no tach signal?
04:17 PM CaptHindsight[m]: I don't know all the details here, maybe you have posted them, but are you certain that the old tach was bad? Can it be the circuit that reads the tach is bad? Wiring, connectors, mesa board etc?
04:18 PM JT-Shop: I damaged the tacho coils when I removed it
04:24 PM JT-Shop: hmm the encoder is only 4000 and the old one is 8000
04:24 PM CaptHindsight: that should throw an following error without retuning
04:25 PM CaptHindsight: JT-shop what does the parallel port tester do if you don't have the proper base address configured?
04:25 PM CaptHindsight: will it error and not even load?
04:26 PM CaptHindsight: retuning and reconfiguring :)
04:30 PM * Tom_L has a feeling JT-Shop is onto something
04:33 PM CaptHindsight: encoder count off by 2:1 should throw a following error very quickly if referenced against the hall sensors
04:40 PM JT-Shop: CaptHindsight, I'm not sure it's just some HAL and pyvcp
05:07 PM JT-Shop: hmm the y axis is 9.5 v/1000 and the replacement is 9.56v/1000 rpm... might have to twiddle with the tacho screw a bit
05:09 PM Tom_L: starting to work better?
05:11 PM JT-Shop: not working at all, but I seem to remember there is a way to use a multimeter to set something on the drives
05:48 PM * JT-Shop doesn't think the servo has any hall sensors in it just a tachogenerator and encoder and encoder counts would not have anything to do with the drive saying stay still
05:48 PM JT-Shop: which has me a bit puzzled
05:53 PM * JT-Shop gives up for the day and goes to the chicken yard
06:02 PM CaptHindsight[m]: tach vs encoder out for 4000 vs 2000 will be different, what servo drive/amp is attached?
06:03 PM JT-Cave: encoder goes straight to the 7i77, drive only has tacho
06:05 PM CaptHindsight[m]: sprayed vinyl upholstery paint yesterday (rattle can) lifts off with masking tape today.... will likely take a week to cure
06:07 PM JT-Cave: ouch
06:07 PM CaptHindsight[m]: why you only try a little test first
06:07 PM CaptHindsight[m]: vs 8 panels :)
06:07 PM JT-Cave: I covered my metal panels in the back seat of my 66 mustang with Naugahyde
06:08 PM JT-Cave: looked like it was upholstered
06:08 PM CaptHindsight[m]: these are door panels in 2 colors
06:08 PM CaptHindsight[m]: once cured it really grips
06:09 PM CaptHindsight[m]: i sprayed over some black i shot months ago with some grey..
06:09 PM CaptHindsight[m]: didn't like the grey so the grey wiped off with only lacquer thinner and left the black
06:09 PM * JT-Cave thinks he will take a quick look at the CHNC to see why the PC won't turn on
06:11 PM _unreal_: so I just cleaned out my cnc vacuum getting ready to bring in the new BABY
06:12 PM _unreal_: the 3d printed two stage cyclone seperator.
06:12 PM _unreal_: so i was cleaning the VAC, dumped it all out. cleaned out the filter ETC.... ETC... ETC.....
06:12 PM _unreal_: went back to the room
06:12 PM _unreal_: got it setup
06:12 PM _unreal_: ran it
06:12 PM _unreal_: WTF!!!!
06:13 PM _unreal_: motor reving, great hose must be clogged
06:13 PM JT-Shop: hmm it's the other green button...
06:13 PM _unreal_: start messing with the tube
06:13 PM _unreal_: thud thud thud ?? wtf was that
06:14 PM _unreal_: covered the bottom of the vacuum, AND TOTALLY saturated the filter I just cleaned
06:14 PM _unreal_: SIGH
06:15 PM Tom_L: JT-Shop, label one "This One" and label the 2nd one "The other one"
06:17 PM JT-Cave: when I converted the CHNC I put a phase converter in the back with start/stop buttons on the front panel
06:18 PM JT-Cave: they are labeled...
06:18 PM -!- #linuxcnc mode set to +v by ChanServ
06:19 PM Tom_L: i forgot you were running a phase converter on some things
06:19 PM Tom_L: as i recall now you had to get a bigger one or bigger motor or something
06:20 PM JT-Cave: bigger, bigger and then bigger
06:20 PM _unreal_: bigger is always better :)
06:21 PM JT-Cave: the discovery 308 has a "high performance" spindle drive and it dies if the voltage drops a smidge
06:21 PM Tom_L: yeah, my bud had one in his garage and the Fadal didn't like running off a phase inverter
06:22 PM JT-Cave: I had to get a special wound 20hp phase converter motor to finally stop it from dropping out
06:22 PM Tom_L: wow
06:22 PM Tom_L: don't drop that on your toe
06:23 PM JT-Cave: it's lighter than the 15hp it replaced... the old 15hp was a super heavy old school motor
06:23 PM Tom_L: ahh
06:28 PM JT-Cave: time for rabbit food
07:26 PM XXCoder: 2 hours, wasted
09:21 PM Rab: _unreal_, I don't get it...what was in the hose?
09:21 PM _unreal_: ahh dust
09:21 PM _unreal_: debris
09:21 PM _unreal_: etc..
09:22 PM _unreal_: bottom right photo https://photos.app.goo.gl/ZadWm49MuJPG7R7AA
09:22 PM _unreal_: my new cyclone
09:22 PM Tom_L: hah making parts for casting
09:22 PM _unreal_: casting?
09:22 PM _unreal_: just 3d printing
09:23 PM Tom_L: alum casting
09:23 PM _unreal_: LOL no need
09:23 PM _unreal_: its a working device
09:23 PM Tom_L: me
09:23 PM Rab: _unreal_, interesting, I've never seen such a design. Does it work well?
09:24 PM Tom_L: it's a mini dyson
09:24 PM _unreal_: https://www.thingiverse.com/thing:4546965
09:25 PM _unreal_: I just edited the design for theintake
09:25 PM _unreal_: and editing the design for the pickup
09:25 PM _unreal_: rab few new photos since last you saw me thinks https://photos.app.goo.gl/1ejmwQjHGskbBvob9
09:31 PM Rab: _unreal_, looks good.
09:34 PM _unreal_: Rab, I have not tested it yet but should work just fine
09:34 PM _unreal_: I printed it at 51 % of its origianl designed size
09:34 PM _unreal_: so that gives me 1" holes. which is what my vac uses
09:34 PM _unreal_: for my cnc