Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
07 Jun 2020 13:10 #170474
by PCW
Replied by PCW on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
The general pin names and functions are described in the hosmot2 manual page
man hostmot2
You can also list all the available* 7I96 hardware pins and parameters with:
halcmd show all hm2_7i96
available* = present in firmware and enabled by driver command line
Setting the PWM frequency would be something like:
setp hm2_7i96.0.pwmgen.pwm_frequency 5000
man hostmot2
You can also list all the available* 7I96 hardware pins and parameters with:
halcmd show all hm2_7i96
available* = present in firmware and enabled by driver command line
Setting the PWM frequency would be something like:
setp hm2_7i96.0.pwmgen.pwm_frequency 5000
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07 Jun 2020 13:59 - 07 Jun 2020 13:59 #170481
by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Thanks.
I already have the following set in the hal file (created by 7i96 config tool).
What I'm missing is a signal to control hm2_7i96.0.pwmgen.00.value and hm2_7i96.0.pwmgen.00.enabled.
I already have the following set in the hal file (created by 7i96 config tool).
# Spindle
setp hm2_7i96.0.pwmgen.00.output-type 0
setp hm2_7i96.0.pwmgen.00.scale [SPINDLE]MAX_RPM
setp hm2_7i96.0.pwmgen.pwm_frequency [SPINDLE]PWM_FREQUENCYWhat I'm missing is a signal to control hm2_7i96.0.pwmgen.00.value and hm2_7i96.0.pwmgen.00.enabled.
Last edit: 07 Jun 2020 13:59 by msageryd.
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07 Jun 2020 14:42 - 07 Jun 2020 15:03 #170488
by PCW
Replied by PCW on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
man motion
( I dont mean to be flip but the actual pin names for spindle control
depend on your specific version of LinuxCNC, and the man page will reflect this. )
( I dont mean to be flip but the actual pin names for spindle control
depend on your specific version of LinuxCNC, and the man page will reflect this. )
Last edit: 07 Jun 2020 15:03 by PCW.
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07 Jun 2020 15:14 #170493
by bbsr_5a
Replied by bbsr_5a on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
like that
#spindel vfd
setp hm2_7i96.0.pwmgen.pwm_frequency 400
setp hm2_7i96.0.pwmgen.00.scale 24000
setp hm2_7i96.0.pwmgen.00.out0.invert_output True
setp hm2_7i96.0.pwmgen.pdm_frequency 6000000
net spindle-speed-cmd spindle.0.speed-out => hm2_7i96.0.pwmgen.00.value
net spindle-on spindle.0.on => hm2_7i96.0.pwmgen.00.enable
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07 Jun 2020 15:47 #170499
by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
@PWC it didn't sound "flip" to me. I appreciate every second people spend to answer my newbie questions. I tried to find my way through the pdf documentation, but it's kind of hard to navigate.
man motion seems to be a better information source.
man motion seems to be a better information source.
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07 Jun 2020 17:42 #170507
by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
I measured my spindle speeds. It's about 10-20% more than commanded. Is there any easy way to calibrate this? It's not that bad for my hobby usage, but it would be nice if it were more correct.
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07 Jun 2020 17:55 #170508
by PCW
Replied by PCW on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Simple:
set the PWM scale 10-20% higher
Bit more complex:
use the scale component to add an offset and scale for best line fit
Fancy:
use the lincurve component to correct the speed at many points
Closed_loop:
use the spindle encoder for velocity feedback with PID to get closed loop
speed control
set the PWM scale 10-20% higher
Bit more complex:
use the scale component to add an offset and scale for best line fit
Fancy:
use the lincurve component to correct the speed at many points
Closed_loop:
use the spindle encoder for velocity feedback with PID to get closed loop
speed control
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07 Jun 2020 18:47 #170512
by msageryd
Replied by msageryd on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
Thanks, I'll go with "simple" for now.
"the spindle encoder".. sounds like everyone has one. My spindle has four connections. I'm not sure what they are, but I'm guessing Ground, A, B, Index. If I had a spindle encoder I would have more connections, wouldn't I?
"the spindle encoder".. sounds like everyone has one. My spindle has four connections. I'm not sure what they are, but I'm guessing Ground, A, B, Index. If I had a spindle encoder I would have more connections, wouldn't I?
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07 Jun 2020 19:04 #170513
by PCW
Replied by PCW on topic Converting CNC-STEP HighZ-1000T to LinuxCNC with Mesa
A spindle encoder is not terribly useful on a router, its pretty much
necessary on a Lathe (unless you have a servo/stepper driven spindle)
and allows you to do things like rigid tapping on a mill.
necessary on a Lathe (unless you have a servo/stepper driven spindle)
and allows you to do things like rigid tapping on a mill.
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