#linuxcnc Logs

Sep 22 2018

#linuxcnc Calendar

01:55 AM Deejay: moin
03:34 AM miss0r2: mornin'
03:34 AM miss0r2 is now known as miss0r
03:40 AM miss0r: "Old machinists never die, they just go out og tolerance"
04:52 AM jthornton: morning
04:53 AM XXCoder: ugh I hate being sick
04:54 AM jthornton: yea me too
04:56 AM Jin|away: morning
04:58 AM Jin|away is now known as Jin^eLD
07:40 AM Martiini: can anyone give me advice about cnc machines
07:41 AM XXCoder: sure no qauntees that it would be GOOD advice but...
07:41 AM XXCoder: ask your question :) dont ask to ask
07:43 AM Martiini: Im interested in learning cnc machines, .. well, I've had interest for years, but it's difficult to learn, using google, youtube videos etc ..
07:43 AM XXCoder: yeah nothing like direct experence to understand things better
07:43 AM Martiini: .. it is sheet metal work, basically .. fanuc controller, laser cutters, amada punch presses, amada cnc mills ...
07:44 AM Martiini: yes, best way to learn is to do everything on the job, in some company workshop
07:44 AM XXCoder: what are you looking to do? do you want to setup for larger production for small runs for example
07:44 AM XXCoder: swuch questions depends heavily on usercase
07:44 AM Martiini: no, just to work on some machines
07:45 AM Martiini: yes, all machines are different too
07:45 AM XXCoder: exactly, so you wanna just make stuff for fun?
07:45 AM Martiini: Im not even sure g-code knowledge is most important, cause many machines use dxf cad files
07:46 AM Martiini: well, like .. what operating system and software does Fanuc use, for example
07:46 AM XXCoder: gcode really isnt very complex, most common is g0 g1 g2 g3 and some others
07:46 AM XXCoder: youre in linuxcnc channel about linuxcnc, a program and os combo to run cnc machines :)
07:46 AM Martiini: I read, g-code is not universal, it could be different on many machines
07:46 AM XXCoder: indeed but then some is quite universal
07:47 AM Martiini: yes, last time I tried linuxcnc, it dint compile on Arch
07:47 AM XXCoder: I would just use entire os
07:47 AM XXCoder: install and done. (besides cnc machine configuration that is)
07:47 AM jthornton: installing LinuxCNC on anything other than Debian is a pia due to dependencies
07:48 AM Martiini: yes, I found windows embedded, but I dont have machine specific controller software
07:48 AM jthornton: it's so simpe to just get the livecd
07:48 AM Martiini: ok, I'll try with Debian
07:48 AM XXCoder: just download a whole system image, flash it to usb media or burn to cd install it
07:48 AM XXCoder: much simpler
07:48 AM Martiini: yep
07:49 AM jthornton: http://linuxcnc.org/docs/2.7/html/getting-started/getting-linuxcnc.html
07:51 AM XXCoder: I looove being sick
07:51 AM XXCoder: 6 am, too sick to sleep lol
07:52 AM Martiini: nowadays, there's 3D printers too - you can make any metal part with 3D printer
07:52 AM XXCoder: sorta kinda
07:52 AM Martiini: u should get some medicine and get well
07:54 AM Martiini: ah, I already have linuxcnc on windows, it had some other name
07:54 AM XXCoder: ehh mach3?
07:56 AM jthornton: it ain't linuxcnc on windoze
08:12 AM Martiini: nowadays, it's all automated factories full of robots, anyway .. I watched youtube video about Audio electric motor factory - all automated, few workers
08:13 AM Martiini: Audi electric car motors
08:17 AM miss0r: I just put my wrist watch backtogether. It would seem that the local watch repair place, used wrong pins when when putting the band/chain back together. No wonder it is falling apart on me
08:17 AM * miss0r bought some proper pins online and just replaced them
08:19 AM miss0r: That is bad for buisness for them! I mean, the only reason I go there is to make sure the job is done properly - now that they don't have that going for them, I don't know
08:19 AM XXCoder: lol yeah
08:20 AM XXCoder: remove the reason of business that leaves them with what?
08:20 AM miss0r: well. I guess more complex repairs on the watch mechanism itself, i'll still have to go.
08:22 AM XXCoder: ah good thing for them lol
08:22 AM XXCoder: but then wrong pins, wrong gears etc?
08:22 AM miss0r: hehe. Yeah. I might be better off taking my buisness elsewhere entirely
08:23 AM Martiini: they make wrist watches that cost half million dollars
08:24 AM miss0r: even more, actualy :) This is not that.. I bought this watch 10 years ago at the modest sum of $800
08:24 AM miss0r: Back to gardening. See you later
08:24 AM XXCoder: later
08:28 AM Martiini: I wish I could invent a small energy source / system .. solar and wind doesn't give too much power .. Some small home Thorium reactor would be cool
08:29 AM Martiini: Google use some "Bloom Energy Server"
08:31 AM Martiini: ah, they're fuel cells with gas
08:47 AM Jin^eLD: that was weird :)
09:31 AM ktchk: anyone using thread milling? G71
09:39 AM Tom_L: it may have been depreciated, it's not in the 2.7 docs taht i see
09:40 AM Tom_L: G33.1
09:40 AM Tom_L: instead
09:40 AM Tom_L: or G76?
09:41 AM jthornton: there is no G71 in LinuxCNC
09:42 AM jthornton: for thread milling you use G2/3
09:42 AM ktchk: https://forum.linuxcnc.org/20-g-code/33267-g71
09:42 AM Roguish: G2 with Z for helix works great for thread milling......
09:43 AM jthornton: Currently the remap version is a proof of concept
09:43 AM jthornton: G71 is a remap not part of LinuxCNC
09:44 AM jthornton: anyway that is for profiles on a lathe not thread milling
09:45 AM ktchk: I am going to get a cutter for milling threads
09:45 AM Tom_L: G2-3 would be your best bet probably
09:46 AM Tom_L: i've been wanting to try that but can't justify the cutter cost just yet
09:50 AM Tom_L: typically you buy one for a pitch range but this one says it will mill any pitch: http://www.harveytool.com/prod/Thread-Milling-Cutters/Holemaking---Threading/Browse-Our-Products_271/Thread-Milling-Cutters---Single-Form_157.aspx
09:51 AM ktchk: My one is m1.2x0.25 us$10
10:00 AM jthornton: a single point will do many pitches
10:02 AM Tom_L: i wanted to try it since my little spindle doesn't have much HP
10:03 AM Tom_L: how many passes do you typically take?
10:03 AM Tom_L: 2-3?
10:03 AM Tom_L: or just one since it's not really a synchronized move
10:24 AM Tom_L: looking at my cam and helix in the docs, how do Z F & P interact?
10:25 AM Tom_L: Z is the thread depth, P would be the pitch but is F the feed of Z or the feed of the tool around the arc?
01:28 PM jthornton: I assume F is the speed that the tool moves and Z just follows
01:33 PM pfred1: F = Feed?
01:37 PM jthornton: aye
02:57 PM Tom_L: JT-Shop, looking over my cam to see if the 'helix' part can support lcnc's format.
02:58 PM Tom_L: i'll write a dummy thread and try it later
03:00 PM Tom_L: if so i may pick up a thread mill somewhere
03:02 PM Tom_L: take a bit of calculating since the cam programs the cutter center on that
03:09 PM JT-Shop: Tom_L: http://www.lakeshorecarbide.com/threadmillprogram2.aspx
03:27 PM Loetmichel: *gnhihi* that was probably the most expensive "assembly service" ever (if it would have been paid)... $me and my wife just went on two 4 hours drives across germany so i could assmble an "ikea" cubboard" at my mother in laws place ;) ... re at home btw.
03:29 PM jthornton: cheaper to have ikea assemble it
03:29 PM Loetmichel: it wasnt from ikea
03:29 PM Loetmichel: but arrived by mail order as a similar flat pack
04:15 PM Deejay: gn8
04:20 PM gregcnc: Tom_L I don' tlike harvey single point thread mills because they have sharp points and chip easily.
04:20 PM Jin^eLD is now known as Jin|away
04:21 PM gregcnc: a small radius does limit the range of threads available, but the tool is much more durable.
04:48 PM MacGalempsy: hello
04:48 PM jthornton: hey
04:53 PM CaptHindsight: who makes oil submersable rotary encoders?? 100=200 count/rev
04:54 PM CaptHindsight: https://www.hohner-elektrotechnik.de/upload/10761479-Data-Sheet-Series-SUBCWD-eng.pdf
04:56 PM CaptHindsight: https://ecatalog.dynapar.com/ecatalog/absolute-encoders/en/AR62_AR63
04:57 PM CaptHindsight: heh haliburton
04:57 PM CaptHindsight: not a co I'd trust avoiding leaks to
04:58 PM SpeedEvil: by oil submersible, do you mean clean oil?
04:59 PM CaptHindsight: clean spindle oil
05:02 PM SpeedEvil: I suppose trying to use non-specced ones isn't really good practice.
05:02 PM MacGalempsy: those sound interesting. some kind of oil bath system?
05:03 PM pcw_home: does it need a bearing? if not, a magnetic encoder chip encapsulated in some decent oil resistant resin should be OK
05:03 PM SpeedEvil: You could 'easily' DIY with a 100 tooth gear and a couple inductive sensors
05:03 PM CaptHindsight: build vs buy
05:03 PM CaptHindsight: don't have time to build everything
05:04 PM SpeedEvil: yeah
05:04 PM CaptHindsight: I also enjoy sleep :)
05:05 PM SpeedEvil: That part looks neat, and reassuringly expensive.
05:05 PM CaptHindsight: List Price:$241.00
05:07 PM CaptHindsight: an but with a housing $954.00
05:09 PM CaptHindsight: MacGalempsy: oil filled gearbox
05:12 PM gloops: giving it away https://www.ebay.co.uk/itm/Kondia-K76-cnc-milling-machine/273465277233?
05:13 PM CaptHindsight: auction
05:14 PM gloops: only 20 hours left, been stripped of cnc motors
05:16 PM pfred1: gloops CNC motors?
05:17 PM gloops: yeah said something about cnc control has been removed but still has ballscrews - ready to go cnc again
05:18 PM CaptHindsight: 63F sun sun sun
05:18 PM pfred1: not all ball screws are ready to go
05:18 PM CaptHindsight: a rare not a cloud in the sky day
05:19 PM jthornton: 63 and rain until Thursday
05:19 PM pfred1: in fact ball screws can get pretty chowdery
05:20 PM gloops: everything will be fine for £150
05:21 PM pfred1: some machinists should stay well away from electronics
05:24 PM tiwake: some yeah... maybe most
05:24 PM tiwake: most don't know computers at all... its kind of pathetic really
05:25 PM CaptHindsight: anyone seen t12 around?
05:26 PM pfred1: tiwake yeah it is like they have a mental block or something
05:27 PM tiwake: pfred1: its bigger than just machinists though... same thing for mechanical engineers (and civil and nuclear and...)
05:28 PM pfred1: I've just seen mechanically inclined people that seem like they're on the ball but they're hopeless when it comes to electricity
05:28 PM pfred1: all their better sense just goes right out the window
05:30 PM tiwake: I don't really understand it really... its the same as fluid dynamics really
05:30 PM pfred1: you'd think good practices would transfer
05:30 PM tiwake: its almost like the same set of physics defines electrons as it does mechanics
05:31 PM pfred1: but it's like they get fed stupid pills
05:31 PM CaptHindsight: automotive hall sensors only go to 20Khz (sealed, high temp, with leads and connectors)
05:35 PM pfred1: I forget what kind of sensor is in my distributor
05:35 PM pfred1: I have a Mallory
05:35 PM pfred1: it might be optical?
05:36 PM pfred1: I know it works at 8,000 RPM
05:37 PM pfred1: sounds like a Dremel under the hood at that speed zing!
05:38 PM CaptHindsight: funny how relatively simple things can be difficult to find pre-assembled for <$1K
05:39 PM pfred1: funny how much many people are comfortable asking for things too
05:42 PM CaptHindsight: is it wrong to ask?
05:56 PM pfred1: in this case ask does not mean the standard definition
06:02 PM Tom_L: gregcnc thanks for the advice
06:02 PM Tom_L: got one you do like?
08:08 PM Tom_L: anyone familiar with coding helix?
08:08 PM Tom_L: one example shows you don't need P and the other uses it
08:09 PM Tom_L: i'm guessing it's just a different way of calculating the same thing?
08:09 PM skunkworks: P was added sort of recently
08:09 PM * skunkworks uses it all the time
08:09 PM Tom_L: or is G17 G2 X10 Y16 I3 J4 Z-1 just a single turn?
08:10 PM skunkworks: yes
08:10 PM skunkworks: if the start and stop is the same location
08:10 PM Tom_L: i don't think i can get my cam to specify the total turns though
08:10 PM Tom_L: that's what i'm up agains
08:10 PM Tom_L: t
08:10 PM Tom_L: i can generate the helix but i can't find a template word to specify the number of turns
08:11 PM Tom_L: and P is an integer so it would have to start and stop in the same spot just a different Z
08:12 PM Tom_L: or is there a better way to single point threads?
08:12 PM Tom_L: ie thread mill
08:15 PM Tom_L: the helix command appears to have all the data necessary to do it, i'm just having trouble matching it with the template words...
08:17 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/helix.jpg
08:17 PM Tom_L: that's my options
08:18 PM Tom_L: not all are used at once
08:18 PM flyback: that's what she said Tom_itx
08:18 PM L29Ah: is it possible to change MAX_VELOCITY in the runtime
08:19 PM L29Ah: ?
08:19 PM L29Ah: or what's the best way to check whether my cnc become able to g0 w/o skipping steps faster with the modifications i made?
08:20 PM Tom_L: test different values
08:22 PM Tom_L: skunkworks so in order to have a multi turn arc i must use the P word right?
08:25 PM Tom_L: that or program a series of single arc moves incrementing Z as the pitch which seems a little crazy
08:28 PM Tom_L: so far all the templates i've looked at just use plane, X Y Z I J and F for parameters
08:31 PM skunkworks: Tom_L: yes for 1 line
08:31 PM skunkworks: you can do a helix with a z move but just for the distance of the single line
08:32 PM Tom_L: i suppose you code yours manually?
08:32 PM Tom_L: yeah, in order to do a thread that way i'd have to stack several of those
08:33 PM Tom_L: i do have a template word that gives the Z distance (pitch) per rev
08:33 PM Tom_L: i haven't found one yet that gives the total turns
08:47 PM Tom_L: yeah i think it will work ok by stacking them
08:47 PM Tom_L: might be easier to calculate the thread pitch anyway then just stack the number of full threads i need
08:50 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/helix.jpg
08:50 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/rue/encoder/helix.txt
08:50 PM Tom_L: just used a random tool for the test
08:53 PM Tom_L: it's not outputting x though but i know why
09:02 PM Tom_L: skunkworks does that look ok?
09:03 PM Tom_L: also i could take the last line and add a P word for the number of lines output and it would do the same thing i think
09:04 PM Tom_L: i'm not much into editing files though if i can get the cam to do it
09:04 PM Tom_L: but so far i can't using the P word
09:05 PM Tom_L: so the last line would read G02 X0.5 Y0.0 Z-0.8462 I-0.5 J0.0 P11
09:05 PM Tom_L: then the rest could be eliminated
09:30 PM _unreal_: got a bunch of small project done finally today
09:31 PM _unreal_: GOD I just want to be done helping my father with his house... why did I ever agree to help
09:31 PM _unreal_: months now
09:31 PM _unreal_: Picked up my power cord
09:31 PM XXCoder: lol
09:32 PM _unreal_: got my power cord pre mounted in the strain relief I got in the mail... still need to drill the BIG ass hole in the case also discovered that they didnt include the BACK retainer :( so I have to find one @#$@#$
09:32 PM _unreal_: so Ic an MOUNT that
09:33 PM _unreal_: Got my 15A reset able breaker installed, got the MAINS relay rivited into place and almost all of my wires have been mounted to it
10:28 PM HighInBC: the electronics is the easy part
10:28 PM HighInBC: the hard part is physically mounting everything
11:12 PM pink_vampire: Tom_L: what is the cam?
11:13 PM Tom_L: smartcam
11:14 PM pink_vampire: free?
11:14 PM Tom_L: no
11:15 PM Tom_L: i bought a seat years ago
11:15 PM pink_vampire: how much was that?
11:15 PM Tom_L: back then ~6-8k
11:15 PM pink_vampire: WOWWWWW