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[06:54:20] <KGB-linuxcnc> 03Sebastian Kuzminsky 05hy-vfd 9bbeebb 06linuxcnc 10src/hal/user_comps/huanyang-vfd/hy_vfd.c hy-vfd: disable debug by default (enable with --debug) * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=9bbeebb
[06:54:20] <KGB-linuxcnc> 03Sebastian Kuzminsky 05hy-vfd 5158142 06linuxcnc 10src/hal/user_comps/huanyang-vfd/hy_vfd.c hy-vfd: remove some dead code * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=5158142
[06:54:20] <KGB-linuxcnc> 03Sebastian Kuzminsky 05hy-vfd 3e467a9 06linuxcnc 10docs/man/man1/hy_vfd.1 10src/hal/user_comps/huanyang-vfd/hy_vfd.c hy-vfd: remove --verbose (it was unused) * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=3e467a9
[06:54:23] <KGB-linuxcnc> 03Sebastian Kuzminsky 05hy-vfd 2007d2c 06linuxcnc 10src/hal/user_comps/huanyang-vfd/hy_vfd.c hy-vfd: it's enough to include signal.h once * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=2007d2c
[06:54:27] <KGB-linuxcnc> 03Sebastian Kuzminsky 05hy-vfd 42e7d9a 06linuxcnc 10src/hal/user_comps/huanyang-vfd/hy_vfd.c hy-vfd: shut down cleanly on ^C or 'halcmd unload' * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=42e7d9a
[06:54:31] <KGB-linuxcnc> 03Sebastian Kuzminsky 05hy-vfd 82b170c 06linuxcnc 10src/hal/user_comps/huanyang-vfd/hy_vfd.c hy-vfd: don't busy-wait so hard at startup * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=82b170c
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[16:10:55] <jepler> hmm we have a license problem linking with readline6, which is gpl3
[16:10:56] <jepler> $ ldd bin/halcmd | grep readline
[16:10:56] <jepler> libreadline.so.6 => /lib/x86_64-linux-gnu/libreadline.so.6 (0x00007f6c1a94d000)
[16:36:03] <KGB-linuxcnc> 03Jeff Epler 05jepler/libreadline-gplv2-v2.6 79c1921 06linuxcnc 10debian/configure 10debian/control.in debian: depend on a GPLv2 version of readline * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=79c1921
[16:36:43] <jepler> seb_kuzminsky: please consider for 2.6 and up ^^ assming buildbot doesn't spit it out
[16:36:58] <jepler> some conflicts merging to 2.7 but easy to resolve
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[17:57:51] <Tom_itx> who was working on that pause resume code with some examples?
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[18:26:42] <pcw_home> dgarrett?
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[18:36:15] <skunksleep> There are some configs in 2.7 and later
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[22:16:01] <seb_kuzminsky> jepler: looks good, & thanks for keeping a watchful eye on that lawyerly stuff
[22:16:58] <seb_kuzminsky> hey folks, question about vfds... i'm trying to make this wonky huanyang work at the hackspace
[22:18:19] <seb_kuzminsky> if i'm a vfd, the core of my job is to accept a frequency as input, and produce AC power at that frequency (with voltage and current caps), is that right?
[22:19:25] <seb_kuzminsky> then the AC motor that's getting that power has some rated voltage, current, frequency, and rotational speed, and it will turn at a speed that's roughly linearly related to the input frequency
[22:19:37] <seb_kuzminsky> with 0 rpm at 0 Hz and $MAX rpm at $MAX Hz
[22:19:43] <seb_kuzminsky> am i understanding that right?
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[22:40:08] <cradek> seb_kuzminsky: they get input power somehow, and it doesn't matter how really, since they just make DC out of it anyway. you can often even run them on DC.
[22:41:40] <cradek> for the output, say your motor expects 60Hz 240v. That's no problem, and you can vary its run speed a bit by changing the output frequency. but beware, you can't do this forever: consider the case where you want to stop - surely 0Hz at 240V wouldn't be what the motor likes
[22:42:44] <cradek> so they deal with that in various ways, for instance having intermediate settings for nice combinations of V vs Hz (and an implicit 0V/0Hz for 0 rpm) and then doing some kind of interpolation
[22:43:28] <cradek> sometimes you can get these setpoints right from the motor plate
[22:45:21] <cradek> fwiw, here's the spindle motor plate on jr:
http://timeguy.com/cradek-files/emc/spindle-motor.jpg
[22:45:59] <cradek> you can see some recommended V vs Hz points
[22:47:08] <cradek> if your motor manufacturer didn't have VFDs in mind, and meant it to plug into the line and run at a fixed speed, you will have to do more guessing
[22:53:43] <cradek> notice on this motor that the V/Hz curve is absolutely not linear
[22:55:49] <seb_kuzminsky> hmm
[22:56:40] <seb_kuzminsky> the motor i'm driving is a 24krpm air-cooled spindle, but the motor plate only has one data point on it
[22:56:49] <seb_kuzminsky> 300 Hz, 220V, 24000 rpm
[22:56:59] <seb_kuzminsky> err, and 13A
[22:57:22] <cradek> perhaps it's only meant to run at that one speed
[22:57:27] <cradek> do you need other speeds?
[22:57:38] <cradek> is this for wood?
[22:57:38] <seb_kuzminsky> i think so
[22:57:59] <seb_kuzminsky> it's 95% for wood, but with different tools, including drills and endmills
[22:58:39] <cradek> I suppose you can always guess and see if it gets hot
[22:59:22] <cradek> some fancier VFDs use methods other than V/Hz setpoints, up to stuff like resolver feedback
[22:59:33] <seb_kuzminsky> but it's safe to assume if i feed it 300 Hz 220V, it'll turn (unloaded) at 24krpm?
[22:59:50] <seb_kuzminsky> and less Hz = less rpm?
[22:59:50] <cradek> yep bet so
[23:00:13] <seb_kuzminsky> ok cool, thanks
[23:00:34] <cradek> yes but with just reducing Hz the current will go up, and power dissipation will go up and make it melty, so you have to also reduce V when you slow down
[23:01:11] <cradek> and be aware I'm about at the "if you need to know more, call jmk" point here
[23:01:26] <seb_kuzminsky> doesn't the vfd do that by itself usually? i think you just tell the huanyang the freq, and it picks a voltage... somehow
[23:01:32] <seb_kuzminsky> heh yeah
[23:01:49] <cradek> it might have sensible defaults for V/Hz but I wouldn't bet on it
[23:02:08] <cradek> and for a motor like that I don't know what sensible defaults would be
[23:02:24] <cradek> can you ask the motor manufacturer?
[23:02:30] <seb_kuzminsky> the huanyang manual is terrible, and its serial protocol is not documented at all (it's not modbus)
[23:02:44] <cradek> yick
[23:03:09] <seb_kuzminsky> ah well
[23:03:10] <cradek> IME you always do this setup at the front panel of the vfd somehow
[23:03:28] <seb_kuzminsky> you mean input the V/F points?
[23:03:31] <cradek> yes
[23:03:51] <cradek> you program it for the motor once and forget about all this
[23:04:01] <seb_kuzminsky> but! the front panel has icky little membrane keys, and my computer has a nice keyboard & screen
[23:04:03] <cradek> then just give a speed command over analog or whatever
[23:04:41] <cradek> and then you write down the settings in the vfd manual and stick it in the machine somewhere :-)
[23:05:10] <seb_kuzminsky> and type it into the README and commit it next to the .ini & .hal files ;-)
[23:05:40] <cradek> yeah, be sure you record it in several places so some can become out of date over time
[23:06:19] <seb_kuzminsky> http://www.c-n-c.cz/download/file.php?id=42252
[23:06:21] <seb_kuzminsky> page 20
[23:07:12] <seb_kuzminsky> looks like you can set three V/F points, and it does linear interpolation between them
[23:07:20] <cradek> aha
[23:07:47] <cradek> notice none go to 0/0, there is a minimum speed
[23:08:23] <seb_kuzminsky> right
[23:08:35] <cradek> Do not be quick to increase it by large amplitude. Otherwise it might cause the tripping of the
[23:08:38] <cradek> inverter or the damage of the machines.
[23:09:02] <seb_kuzminsky> time to grill hamburgers for like 10 kids
[23:09:04] <seb_kuzminsky> http://rs2img.memecdn.com/i-must-go-my-people-need-me_c_166543.jpg
[23:09:17] <cradek> haha
[23:09:21] <cradek> have fun
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[23:41:08] <KGB-linuxcnc> 03Jeff Epler 052.7 bc4a0df 06linuxcnc 10debian/configure 10debian/control.in Merge branch '2.6' into 2.7 * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=bc4a0df
[23:41:08] <KGB-linuxcnc> 03Jeff Epler 05master f699c1c 06linuxcnc 10debian/changelog 03docs/src/man/man9/streamer.9.txt 10scripts/linuxcnc.in Merge branch '2.7' * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=f699c1c
[23:41:08] <KGB-linuxcnc> 03Jeff Epler 052.6 79c1921 06linuxcnc fast forward * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=79c1921
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