#linuxcnc | Logs for 2019-01-09
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[01:07:54] <CaptHindsight> jym: what is it with you folks in CA? https://www.huffingtonpost.com
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[01:12:46] <jym> CaptHindsight: Uh, not enough drugs? Cheap drugs?
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[01:13:13] <fragalot> why do drugs when you could be driving a prius. https://imgur.com
[01:14:13] <CaptHindsight> the option you wish you could order
[01:15:56] <CaptHindsight> https://what-if.xkcd.com
[01:16:59] <fragalot> so that's why the saturn V isn't being used anymore
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[02:33:05] <jym> Hot Water Rocket Stove - https://www.youtube.com
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[03:32:54] <selroc> log
[03:32:54] <russian_troll> selroc: Today's Log http://www.isaeff.net
[03:32:54] <c-log> selroc: Today's Log http://tom-itx.no-ip.biz:81
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[03:41:38] <Deejay> moin
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[03:59:47] <veek> gloops, hey check this out - how would you machine that tube and what about the focus/could I use a micrometer instead - Insize 3202 - it has graduations of 0.01mm but the scope needs 0.1mm/rotation : http://www.funsci.com https://www.opto.de
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[05:49:24] <jthornton> morning
[05:51:07] <XXCoder> hey
[05:51:39] <XXCoder> you remember guy i talked that was drinking?
[05:51:53] <XXCoder> his stuff is gone, so either he now puts em away, or he was fired
[05:52:04] <XXCoder> we are looking for weekend mill so im guessing bye bye
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[06:17:30] <Tom_L> 28°F
[06:18:08] <XXCoder> yo
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[06:21:42] <XXCoder> heys'
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[06:33:36] <jthornton> hmm I forgot lol
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[06:39:17] <jthornton> 39°F
[06:40:17] <XXCoder> jthornton: did you see what i said above?
[06:41:29] <gloops> hmm 10 degree v bits arrived next day - but i think the chances of carving wood with these is virtually 0 lol
[06:42:02] <gloops> 30 degree look doable though
[06:42:53] <jthornton> yea but I forgot about that guy
[06:43:45] <XXCoder> ahh ok lol
[06:44:01] <XXCoder> anyway if he is indeed gone its likely due to him drinking on job
[06:44:28] <XXCoder> you were surpised he was kept on so long but its only so much company will accept before "fine that guy is gone"
[06:45:28] <jthornton> yea, that's sad that someone can't go without drinking while working
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[07:29:20] <elmo40> roycroft, mothballing nuclear does not make sense to me. it is, arguably, a clean energy. (if you ignore the startup costs... LoL )
[07:29:57] <elmo40> China is going more nuclear. also a lot of solar and wind, but that is still only single digit power producers.
[07:30:59] <elmo40> to get the same output as nuclear you need something like 1,500 hectares of windmills, at full wind speed, 24/7 !
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[07:33:25] <XXCoder> elmo40: and LONG storage for spent stuff
[07:33:49] <XXCoder> i dont know why many pro-nuclears ignore that part
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[07:51:04] <XXCoder> wow interesting https://grid.space
[07:51:16] <XXCoder> fsm, laser and milling
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[12:30:23] <fragalot> hi
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[12:41:26] <renesis> ping
[12:41:56] <renesis> cant change nick when in ident only chan, thats not very convenient, yo
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[12:43:43] <fragalot> llol
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[12:54:32] <jym> renesis: use an irc client where you can login into a network twice
[12:57:06] <renesis> ?
[12:57:24] <renesis> pretty sure i can log in as many times as i want
[12:57:37] <renesis> im on like three networks right now
[12:57:58] <renesis> im just not sure how that helps
[12:58:56] <renesis> if youre client logs in, and youre client is ghosted because of a disconnect, you end up with an alt nick, if your client is setup to autojoin, you in a channel with an unidentified nick
[12:59:33] <renesis> if you go to change your nick and identify, you cant because silenced in a channel, so you have to part, change nick and ident, then rejoin. not convenient
[12:59:47] <renesis> im not going to run an ident script that handles all of autojoin
[13:00:05] <renesis> the problem is freenode, i decided.
[13:01:43] <gregcnc> i thought you could ident more than one nick
[13:02:54] <jym> gregcnc: You CAN have multiple nicks associated to one account, example...
[13:02:58] jym is now known as Jymmmmmm
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[13:04:04] <Jymmmmmm> or
[13:04:11] Jymmmmmm is now known as Red70sShow
[13:04:18] <Red70sShow> gregcnc: <--- Dumbass
[13:04:22] Red70sShow is now known as Jymmm
[13:04:24] <Jymmm> =)
[13:04:26] <gregcnc> lol
[13:05:28] <renesis> gregcnc: im annoyed enough i have to ident at all
[13:05:41] <Jymmm> renesis: gregcnc https://freenode.net
[13:05:47] <renesis> clearly the answer is #linuxcnc moves to efnet
[13:05:56] <gregcnc> sure, but the pleasure of listening to Jymmm makes it worthwile
[13:05:57] <Jymmm> renesis: Why? you can autologin
[13:06:15] <renesis> this is all too complicated for irc
[13:06:26] <renesis> my client is setup how i want
[13:06:28] <renesis> change is bad
[13:06:43] <Jymmm> renesis: Chenge is never bad, just unknown
[13:06:58] <renesis> no this does not apply to my irc client
[13:07:08] <renesis> tho i changed from tmux to screen and thats going okay
[13:07:25] <renesis> wait no, screen to tmux
[13:07:32] <Jymmm> screen isn't a irc client
[13:07:53] <Rab> It is if you can type fast enough.
[13:07:54] <renesis> right im saying maybe your statement applies to terminal windowing
[13:08:16] <renesis> but not to irc clients
[13:08:23] <Jymmm> Rab: I USED to be able to do that, but all encrypted now =)
[13:08:39] <Rab> Jymmm, very good.
[13:09:27] <Jymmm> Rab: telnet port 6667 and away we go. VERY confusing trying to irc when in multiple channels at once =)
[13:09:42] <renesis> ivan drago still uses bx
[13:12:54] <Jymmm> I like weechat
[13:13:02] <Rab> Hmm, no #linuxcnc on efnet.
[13:13:05] <Jymmm> https://weechat.org
[13:13:33] <renesis> actually ya ive considered switching to weechat for years
[13:13:43] <renesis> but looks like i dont care so much
[13:14:13] <Jymmm> renesis: You can use screen+weechat to login from anywere fwiw
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[13:15:05] <jthornton> step # 1.259 finish painting the bathroom... check
[13:15:25] <jthornton> step # 1,300 wait for the paint to dry... pending
[13:15:34] <renesis> tmux + irssi does same
[13:16:01] <Jymmm> https://gist.github.com
[13:16:02] <renesis> i did screen + irssi for iunno, decade+
[13:16:40] <Jymmm> I like the windowing of weechat
[13:17:33] <Rab> jthornton, I must wonder about the intervening 1,298.741 steps.
[13:18:17] <jthornton> been putzing with this project for far too long lol
[13:18:30] <renesis> is like gcode, you just make the line numbers up
[13:29:55] <renesis> so do N words have to be in order?
[13:30:17] <renesis> like, only increasing
[13:30:50] <renesis> like, can you do N10, N30, N20 without things flipping out
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[13:32:26] <renesis> https://www.tormach.com
[13:32:47] <renesis> tormach says gcode dgaf
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[13:35:11] <mozmck> The line numbers are ignored, and I just leave them out and turn on line numbering in my editor - much more useful IMHO
[13:36:34] <renesis> right i normally leave em out or gap them by 10, no need to repeat or out of order so never done it
[13:43:49] <JT-Shop> line numbers are just comments and not used for anything
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[13:48:28] <fragalot> always nice when you have to go around the entire neighbourhood chasing down packages that have been left at random peple's houses >.>
[13:49:08] <fragalot> "you weren't home, so we dropped it off 9 houses down the road"
[13:57:39] <Jymmm> fragalot: IS that the gingerbread house?
[13:59:00] <fragalot> :P
[13:59:41] <renesis> jt-shop: theyre used for jumps, no?
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[14:01:47] <renesis> oh, linuxcnc uses o words
[14:14:19] <Jymmm> Damn, I'd LOVE to be able to engrave like this... https://www.youtube.com
[14:14:31] <Tom_L> funny cause o words are comments in other controls, not subs
[14:15:42] <renesis> i dont think theyre comments, they just dont seem to matter with file based gcode scripts
[14:16:49] <renesis> i think on the haas machines i used, it basically referenced all code by owords, so you wouldnt be able to pull up code without it
[14:17:59] <Tom_L> some fanuc controls use o words for comments
[14:20:16] <phaxx> that hammer is classy af
[14:20:17] <roycroft> you can't do that kind of work on your own, jymmm - you need a helper cat
[14:28:08] <renesis> helper cat is exhausted at end
[14:28:46] <mozmck> I've done engraving like that on mother of pearl - would love to do it on metal like that!
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[15:04:28] <JT-Shop> renesis: we don't have jump or goto
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[15:43:08] <gloops> i got some 10 degree v bits arrive today, i dont have much faith in them being able to v carve wood
[15:43:17] <gloops> .1mm tip
[15:44:32] * Deejay uses them for milling pcbs
[15:44:45] <renesis> spin fast, cut shallow, start some coffee
[15:44:48] <renesis> yeah
[15:44:58] <gloops> Deejay what depth of cut? feed etc?
[15:45:16] <Jymmm> roycroft: The only kitty kat in this area is 600 pounds
[15:45:17] <gloops> the tips are like fish bones, i think these will quickly snap
[15:45:21] <Deejay> pcb has 0,035mm copper :D
[15:45:42] <gloops> i need 2mm deep at least
[15:45:55] <renesis> its deeper than that, no?
[15:45:57] <Deejay> i think thats not comparable to wood ;)
[15:46:00] <renesis> yeah
[15:46:32] <renesis> i would go like .005" deep, 10 krpm, and maybe 10 ipm
[15:46:35] <gloops> ill try 24k spindle, 12ipm maybe .5mm cut
[15:47:01] <renesis> how many cutters do you have?
[15:47:22] <gloops> 10 - theyre only like 50 pence each
[15:47:26] <renesis> would maybe start bit shallower
[15:47:33] <renesis> oh, shrug
[15:47:53] <Deejay> quality, eh? ;)
[15:48:00] <gloops> hmm maybe yeah, i could sacrifice 1 st tool, try .2mm then .3, .4 - until it snaps
[15:48:11] <renesis> your numbers dont seem crazy unless its super hard wood
[15:48:48] <gloops> i wont get chance till the weekend anyway now
[15:49:45] <gloops> Deejay sure..these are the best - cuts any material, doesnt wear, unbreakable etc
[15:49:58] <Deejay> hehe
[15:50:00] <renesis> ive done raster cuts in wood around those numbers, but i think they were 30 deg
[15:50:00] <Deejay> made from chinesium
[15:51:05] <gloops> https://www.ebay.co.uk
[15:51:22] <gloops> i got some 30s as well, 30 degree does look doable
[15:51:23] <renesis> alloy?
[15:52:17] <Deejay> hmm, i think i have some of them, too
[15:52:59] <gloops> hmm what does it mean - alloy? its says carbide on the description, they are very shiny
[15:53:10] <renesis> oh, who knows then
[15:54:03] <gloops> anyway, i guess theyll snap to a point they can hold - still be 10 degree lol
[15:57:00] <renesis> yeah for PCB, w/ 30deg, i would use them for .008" space/trace stuff, after breaking for .012" space/trace
[15:58:47] <fragalot> gloops: you may want to have an air blast to clear the chips going that deep in a single pass on wood
[15:59:11] <gloops> .5mm?
[15:59:24] <fragalot> it's a 10° tool, those are like needles
[15:59:55] <gloops> i can put some vaccum to it, not got any blowing set up
[16:00:05] <fragalot> doubt that'd do anything
[16:00:23] * Deejay vacuums all his wood milling
[16:00:30] <Deejay> works fine. do not want all the dust in here
[16:00:40] <gloops> its only an experiment really, it has to be doable at a certain speed or its pointless
[16:04:12] <Deejay> gn8
[16:04:20] <gloops> night
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[16:10:15] <fragalot> this is actually quite neat. https://openjscad.org
[16:12:29] <gloops> looks like the inner shape would come out of the holes though?
[16:13:00] <fragalot> it's just their logo
[16:13:22] <fragalot> but it's openscad,.. without having to install openscad.
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[16:27:46] <Jymmm> Ok, I'm impressed in multiple ways here... https://www.youtube.com
[16:28:07] <Jymmm> even his drill guide
[16:30:32] <Wolf_> grr wtf cant get rt kernel to work on my itx box
[16:30:42] <gregcnc> first time i'v ever reverse the drill to remove the bit?
[16:33:15] <Wolf_> loaded the rt kernel and reboot, get a kernel panic...
[16:36:06] <Wolf_> JT-Shop, any ideas?
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[16:41:13] <Jymmm> gregcnc: Yeah, I noticed that too,
[16:42:35] <Jymmm> gregcnc: GREAT project if you just have old slabs of wood laying around
[16:43:25] <gregcnc> yeah most designs like that are layers of MDF
[16:44:43] <XXCoder> it could be made by laser and cross sections im sure
[16:44:48] <XXCoder> or router
[16:46:24] <JT-Shop> which guide did you use to build the rt preempt kernel and how old is the motherboard?
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[16:55:06] <Jymmm> XXCoder: not as pretty though
[16:55:17] <XXCoder> probabloy not no
[16:55:38] <XXCoder> but same time if paint is planned it matters less. i guess it depends on what person want
[16:59:02] <Wolf_> JT-Shop your guide for mint 19, mobo is a j1900 cpu https://www.newegg.com
[17:00:30] <jthornton> Wolf_: I'd try debian 9 http://gnipsel.com
[17:00:53] <jthornton> I have a j1900 but IIRC it's running Ubuntu 10.04
[17:02:17] <Wolf_> seems to be a issue with the inird.img-4.19.1-rt3 being too large
[17:06:22] <Wolf_> found this https://unix.stackexchange.com but I dont really know what i'm doing, so not sure how to implement it
[17:15:05] <ziper> andypugh, I did it
[17:15:53] <ziper> not just the nichols but the hardinge too
[17:18:01] <andypugh> did what?
[17:18:26] <ziper> bought them
[17:18:57] <andypugh> Ah, right.
[17:19:11] <andypugh> Vague memories return
[17:19:35] <ziper> only problem is it was a production shop
[17:19:42] <ziper> so some of them are set up a little weird
[17:20:52] <ziper> andypugh, by the way, I liked the trick with the conical block
[17:21:48] <andypugh> So, how much did you pay, if that’s not an impertinent question?
[17:22:46] <andypugh> http://www.lathes.co.uk
[17:26:52] <ziper> 100 per machine
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[17:27:25] <andypugh> so, they were free then? (less than scrap value)
[17:28:48] <gregcnc> 100USD for a hardinge lathe?
[17:31:20] <ziper> gregcnc, horizontal mill
[17:32:07] <skunkworks> Rab: yes - some experimentin I am doing
[17:32:08] <skunkworks> http://electronicsam.com
[17:32:37] <skunkworks> btw - you cannot rigid tap at 2000rpm on our mill... It tried though...
[17:33:52] <jthornton> Wolf_: my initrd.img-4.19.1-rt3 seems to be no bigger than the stock img https://paste.ubuntu.com
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[17:35:04] <jthornton> skunkworks: has all the fun
[17:35:21] <Wolf_> mine is 10x the generic, in /boot 595.3mb vs 59.5mb on the generic
[17:35:50] <jthornton> yea mine is 10x the generic
[17:36:23] <ziper> well, about twice scrap price by my estimate
[17:36:50] <jthornton> you should use debian 9 instructions it's only 18.9 Mb
[17:37:05] <Wolf_> but I want mint lol
[17:37:17] <jthornton> change motherboards lol
[17:37:47] <jthornton> my mods to debian make it almost as nice as mint
[17:37:59] <gregcnc> Ziper one of the small ones I guess BB4 or something?
[17:38:37] <Wolf_> worst part is the kernel build took over 5hrs on that box =/
[17:39:42] <jthornton> follow this guide and you'll be up and running in no time http://gnipsel.com
[17:39:59] <ziper> gregcnc, its a bit bigger than that
[17:40:11] <ziper> the nichols is pretty big
[17:40:29] <Wolf_> going to give "make INSTALL_MOD_STRIP=1 modules_install" a shot and see what happens
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[17:40:50] <jthornton> let me know what you get, if it works I'll update my pages
[17:40:59] <Rab> skunkworks, very nice. No breakouts on the two hidden corners? ;)
[17:43:28] <ziper> sounds like the vertical heads are pretty rare?
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[17:49:52] <gregcnc> ziper probably, the mills aren't very common. i'd like to have a decent TM/UM
[17:50:40] <ziper> that looks like the one I have
[17:51:16] <ziper> without the head
[17:52:50] <ziper> how feasible is it to make up a head to fit?
[17:53:08] <gregcnc> here's one local with a bridgeport head on it, https://chicago.craigslist.org
[17:54:00] <Wolf_> well, thats impressive, i killed it to the point that it locks up the bios now lmao
[17:57:53] <ziper> yes that looks very nice
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[18:14:34] <jthornton> Wolf_: you mean you can't even get to the bios on bootup?
[18:15:07] <Wolf_> it booting but slow as dirt
[18:15:44] <jthornton> that don't sound good
[18:28:29] <Wolf_> going to give deb 9 a shot
[18:54:08] <skunkworks> Rab: no.
[18:55:08] <skunkworks> that is even taking a few thousands off to make it round after the fact...
[18:55:45] <skunkworks> turning on centers without a dog... Few light cuts
[18:55:46] <skunkworks> https://www.youtube.com
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[19:13:51] <andypugh> skunkworks: There are actual drive centres for that
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[19:14:18] <andypugh> I found one by accident on eBay, advertised as a reamer, of all things
[19:15:41] <andypugh> Only picture I have is of me re-sharpening the HSS drive pins: https://photos.app.goo.gl
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[19:20:27] <andypugh> …When you see a job you like the look of, somewhere you would like to live, requiring a but more than your current qualifications, for half your current salary…
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[19:40:02] <ziper> how much is a 36 inch calliper worth
[19:41:02] <andypugh> Well, certainly no more than ÂŁ250: https://www.machine-dro.co.uk
[19:41:57] <andypugh> Anyone needing to measure that in production would buy the digtital one.
[19:42:24] <andypugh> Maybe paying ÂŁ130 for the calibration
[19:42:43] <andypugh> So, a manual / visual one is effectively worthless.
[19:43:03] <andypugh> say ÂŁ50 as a curiosity?
[19:43:30] <andypugh> Now, when it was made… £thousands
[19:45:32] <ziper> oof so you mean nobody actually buys these? https://www.grainger.com
[19:45:43] <asdfasd1> does anyone know how to fix this issue? - https://github.com
[19:45:45] <ziper> how do vernier callipers go out of calibration?
[19:46:31] <ziper> why do I keep saying "calliper"
[19:46:46] <andypugh> ziper: Unless you put them in a tensile testing machine, they don’t and can’t
[19:47:50] <andypugh> But it’s not about that it can, you need to prove it hasn’t by tying it to an international standard.
[19:48:47] <ziper> why do you need a testing machine instead of just a standard?
[19:49:50] <andypugh> ziper: I was just thinking of machines that I have used that could stretch a caliper. You would, of course, test to a standard
[19:50:16] <andypugh> asdfasd1: Rob and Zultron probbaly know how….
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[19:50:56] <ziper> I also accidentally got one of these, lol https://cdn1.bigcommerce.com
[19:51:03] <asdfasd1> andypugh: thanks
[19:51:04] <andypugh> asdfasd1: Maybe add your interest to #134?
[19:51:12] <ziper> talk about curmudgeonly
[19:52:03] <andypugh> It probably made sense when calipers were expensive
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[19:54:08] <andypugh> This 3000mm / 10’ caliper is quite expensive : https://www.machine-dro.co.uk
[19:54:15] <Wolf_> this is why going to auctions is dangerous, buy stuff because the price is good but have no real use for it lol
[19:56:31] <pcw_home> Whats needed to merge #546?
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[19:58:13] <andypugh> I _think_ Rob can just push it?
[19:58:40] <pcw_home> Yeah was hoping he would but not sure
[19:58:57] <andypugh> It’s not like anypne is going to argue with him :-)
[19:59:42] <pcw_home> fixes an old TP bug and a newly discovered TP bug
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[20:00:19] <pcw_home> no he fixed both almost instantly given a test case
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[20:17:12] <norias> vernier calipers are still relatively expensive
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[20:18:28] <andypugh> Yes, I think that at the moment an actual vernier is harder to make than a digital caliper. And there is no reason to prefer the mechanical version.
[20:18:35] <norias> I still use mine often. I have a 12" set.
[20:19:04] <norias> I have 6" digital and 12" vernier.
[20:19:13] <norias> eh
[20:19:34] <andypugh> I find my 4” digital really handy
[20:19:40] <norias> I kinda do prefer the vernier, often. I'd buy a 6" if I was going to be machining daily.
[20:19:57] <andypugh> And also, the 300mm one. That’s really useful
[20:20:30] <andypugh> For machining the 4” is good
[20:20:45] <norias> depends on the machining
[20:20:45] <andypugh> And on a lathe, think about the left-handed ones…
[20:21:15] <norias> last place i was at, 50" was a normal diameter
[20:21:27] <norias> of course, we used micrometers to measure that
[20:21:28] <andypugh> that’s a job for a Pi tape
[20:21:29] <gregcnc> oh, how many actually make left hand calipers?
[20:21:46] <norias> we pi taped for rough and mic'd for final inspection
[20:22:08] <andypugh> norias: they make vernier pi tapes, 3.14x more accurate than a caliper
[20:22:22] <norias> yeah, that's what we had
[20:22:45] <norias> did .001" supposedly
[20:22:58] <norias> but, again, we mic'd for final dimensions
[20:23:28] <andypugh> A vernier pi tape should be nearly as good as the caliper. Possibly better.
[20:23:46] <norias> uh, sure, but we're talking about micrometers
[20:24:13] <andypugh> (My dad used to work for a company that made 23m gears. That was pi-tape all the way.
[20:24:42] <andypugh> Sorry, I meant to say caliper v Pi tape
[20:26:22] <andypugh> vernier is good to 0.001”, so vernier pi tape is good to 0.000318. Who wins>
[20:27:48] <gregcnc> how difficult is it to get wrapped around the part properly?
[20:29:07] <andypugh> Well, you need a bunch of apprentices with a 23m gear….
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[20:36:18] <ziper> norias, why do you prefer the vernier?
[20:36:49] <norias> no batteries, no rack
[20:36:57] <norias> you choose your level of precision
[20:37:10] <ziper> what about dial?
[20:37:24] <norias> dial's have racks
[20:37:25] <andypugh> But: The digital ones have extra tricks.
[20:37:42] <norias> there's basically nothing that can fail on a vernier
[20:37:48] <norias> they are faily bullet proof
[20:37:55] <norias> fairly
[20:38:48] <andypugh> Making a part to metric on an imperial lathe? Measure the mating part, or dial in the dimension. Zero the caliper, change the units. Now you know how much to take off in lathe-native units
[20:38:50] <norias> i only have the 6" digitals because they were a required purchase during my apprenticeship
[20:39:07] <gregcnc> I used to like vernier, but no longer, too slow
[20:39:54] <andypugh> Mesuring hole centres? (or stud centres)? Measue one hole or stud, zero the caliper, read centres directly, with no maths.
[20:40:16] <norias> everyone has their preferences
[20:40:18] <ziper> neat
[20:40:22] <andypugh> Looks odd? Change units
[20:41:16] <gregcnc> I need a coolant proof caliper. My lathe drips coolant right onto the part I'm trying to measure
[20:41:46] <andypugh> Not sure how obvious the hole-centre one is, I thought it was, sent it to a magazine, got a free sub. 2 years ago.
[20:42:11] <gregcnc> not very, I was like Oh duh, I do it all the time in my head
[20:42:32] <gregcnc> all metric so not difficult
[20:42:50] <andypugh> I have a rack-based coolant-proof digital, but hate it as it isn’t absolute and times-out in 30 seconds.
[20:43:18] <ziper> what do you mean isn't absolute? you have to zero it every time?
[20:43:57] <andypugh> Yes, when it goes to sleep have to puch it back to closed and re-zero
[20:44:11] <andypugh> Seems to be rack-ancoder
[20:44:18] <andypugh> (encoder)
[20:45:16] <andypugh> I haven’t yet tried a proper coolant-prrof digital. All mine go screwy for days if they get a drip of coolant.
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[20:46:53] <gregcnc> not exactly cheap
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[20:49:06] <andypugh> Talking of calipers, some are now so cheap you can take a hackwaw to them with a clear conscience. : https://www.thingiverse.com
[20:49:53] <norias> 3 phase brushless dc motor?
[20:49:58] <andypugh> (held on by magnets)
[20:49:58] <norias> uh... is that a thing?
[20:50:01] <gregcnc> Don't they come that way for quills already?
[20:50:36] <andypugh> gregcnc: Yes. But mine needed no machining of the lathe and cost < $10
[20:51:24] <andypugh> norias: I have never seen a brushless motor that _wasn’t_ three phase
[20:51:35] <gregcnc> sure you have
[20:51:46] <gregcnc> muffin fan
[20:52:05] <norias> there's a phase in DC power?
[20:52:29] <gregcnc> electronically commutated DC motor
[20:52:47] <pcw_home> stepmotors are brushless 50 pole motors...
[20:52:48] <andypugh> Well, technically every stepper is a 2-phase brushless motor. But I was trying to get the right balance between helpful and pedantic :)
[20:53:20] <pcw_home> some variable reluctance motors also
[20:53:50] <gregcnc> brushless DC is common today, less so 20 years ago
[20:54:01] <andypugh> norias: Brushless DC motors are, actually, not DC.
[20:54:12] <norias> oh?
[20:54:25] <gregcnc> trapezoidal commutation VS sinusoidal
[20:54:56] <gregcnc> do you have questions about BLDC?
[20:55:06] <norias> reading right now
[20:55:06] <andypugh> gregcnc: Accurate, but not helpful…
[20:55:23] <gregcnc> trivial
[20:56:24] <gregcnc> i suppose it depends if you're being very picky with the application
[20:56:53] <andypugh> norias: If you consider a classical DC motor, the commutaror and brushes arrange matters such that the power supply to the motor is DC but the current through the rotor is 2-phase AC. Got that?
[20:57:06] <norias> yeah
[20:58:21] <andypugh> So, a brushless DC motor has a 3-phase stator independently commutated, but is otherwise constructed like a clasical DC motor
[20:59:37] <andypugh> There are sensors in the motor that tell the controller where the rotor is, and the field coils are energised accordingly.
[21:00:04] <andypugh> At this point it is useful to step back to the stepper
[21:00:46] <andypugh> You energise the 2 phases of a stepper in a sequence and the rotor chases rhe stator
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[21:01:48] <andypugh> With a brushless motor it’s much the same, except that the stator knows where the rotor is, and runs away…
[21:03:03] <andypugh> So the stator magnetic field is always 90 degrees away from the rotor, for maximum torque and/or minimum current
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[21:06:31] <andypugh> Stepper; rotor magnets chases stator magnetic field , generally catch it. Brushless: Stator magnetic field senses rotor magents and runs away, never ge4ts caught.
[21:06:44] <pcw_home> right, a step motor without feedback spends most of its time pulling radially (0 degrees) on the rotor at full current
[21:08:44] <andypugh> There are 5 phase stepprs too. Once you grasp the two modes of operation, those make sense too
[21:09:04] <pcw_home> also 3 phase stepmotors
[21:09:25] <andypugh> You can run a 3-phase brushless as a stepper, you can run a stepper (+ encoder) as a brushless.
[21:09:48] <pcw_home> Rather big steps however
[21:10:21] <andypugh> And “AC servos” are physically identical to “brushless DC” motos
[21:12:15] <andypugh> It’s common to drive a brushless motor or AC servo in “stepper mode” when searching for encoder index or motor zero to start commutation in bldc or ac servo mode
[21:12:37] <andypugh> norias: Still there?
[21:12:50] <norias> yeah
[21:14:19] <andypugh> You have the fortune / misfortune to talking to a manufacturer of AC servo / BLDC drives and the chap wrote the LinuxCNC driver for it.
[21:15:19] <andypugh> if rene_dev_ is still awake then we can assemble a genuinely world class team :-)
[21:16:07] <andypugh> How far down this rabbit hole do you care to venture :-)
[21:17:11] <andypugh> (And I still have no idea when a BLDC motor becomes an AC servo)
[21:18:49] <andypugh> gregcnc: Mantioned Trapezoidal and Sinusoidal commutation. Both work with all three motors mentioned so far.
[21:19:49] <andypugh> Sinusoidal commutation is a close analogue to high-division microstepping of stepper motors.
[21:21:28] <andypugh> Here is a video of the exact same motor being commutated trapezoidally and sinusoidally. https://www.youtube.com
[21:22:32] <andypugh> So, it starts off being what most would call BLDC then transmogrifies into an AC servo.
[21:25:31] <andypugh> Anyway, I hope we now have you utterly confused, as it is time for me to sleep :-)
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[21:30:12] <`Wolf> JT-Shop, so far so good, pip wouldnt install tho
[21:30:14] <elmo40> i love the look of confusion ;-)
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[22:21:04] <flyback> https://en.wikipedia.org
[22:21:15] * flyback bites elmo40
[22:21:18] <flyback> I HATE ELMO
[22:21:25] <flyback> ESPICALLY IF ELMO IS A EH?-HOLE
[22:21:30] <flyback> CANUCK!
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[22:53:21] <`Wolf> ugh, got the box working, mostly, cant ping the mesa =/
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[23:30:07] <skunkworks> `Wolf:why not?
[23:54:45] <`Wolf> cause I missed something simple lol
[23:54:52] <`Wolf> got it connected now
[23:55:03] <`Wolf> just need to figure out how to config now