- Configuring LinuxCNC
- PnCConf Wizard
- Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
20 Mar 2017 07:34 #89929
by cmorley
Replied by cmorley on topic Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
this is the part of the HAL file i'm talking of:
as you can see the scale is .000143
3500 x .000143 = .5005 which is actually half speed - so that doesn't jive with the behavior.
So either the 7i76 can not be scaled that low or I am missing something else - which is quite possible.
So if you try without two ranges and let us know if it works properly.
and with two range setting:
can you use halmeter to check what the output of signals:
spindle-vel-cmd-rpm-abs
spindle-pid-out
spindle-output
are when you request a speed of say 1750 or 3500 (no need to have the VFD actually run the motor for that test)
#*******************
# SPINDLE S
#*******************
setp pid.s.Pgain [SPINDLE_9]P
setp pid.s.Igain [SPINDLE_9]I
setp pid.s.Dgain [SPINDLE_9]D
setp pid.s.bias [SPINDLE_9]BIAS
setp pid.s.FF0 [SPINDLE_9]FF0
setp pid.s.FF1 [SPINDLE_9]FF1
setp pid.s.FF2 [SPINDLE_9]FF2
setp pid.s.deadband [SPINDLE_9]DEADBAND
net ratio_select.out pid.s.maxoutput
setp pid.s.error-previous-target true
net spindle-index-enable <=> pid.s.index-enable
net spindle-enable => pid.s.enable
net spindle-vel-cmd-rpm-abs => pid.s.command
net spindle-vel-fb-rpm-abs => pid.s.feedback
net spindle-pid-out pid.s.output => scale.gear.in
net gear-ratio ratio_select.out-f => scale.gear.gain
setp ratio_select.in00 0.000143
setp ratio_select.in01 0.000143
net gear-select-a => ratio_select.sel0
net spindle-output <= scale.gear.outas you can see the scale is .000143
3500 x .000143 = .5005 which is actually half speed - so that doesn't jive with the behavior.
So either the 7i76 can not be scaled that low or I am missing something else - which is quite possible.
So if you try without two ranges and let us know if it works properly.
and with two range setting:
can you use halmeter to check what the output of signals:
spindle-vel-cmd-rpm-abs
spindle-pid-out
spindle-output
are when you request a speed of say 1750 or 3500 (no need to have the VFD actually run the motor for that test)
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20 Mar 2017 07:50 #89930
by cmorley
Replied by cmorley on topic Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
It's a bit confusing about the scaling set in the INI for the spindle.
If you use only one range the INI scaling represents RPM
it using two ranges it's scaled so 1 represents max output.
this is because it is scaled between the PID output and the MESA card input based on what gear is selected.
HALmeter should be your friend here - use it to follow the signals from requested RPM (spindle-vel-cmd-rpm-abs) through all the scaling and selection to the MESA input ( spindle-output)
Chris M
If you use only one range the INI scaling represents RPM
it using two ranges it's scaled so 1 represents max output.
this is because it is scaled between the PID output and the MESA card input based on what gear is selected.
HALmeter should be your friend here - use it to follow the signals from requested RPM (spindle-vel-cmd-rpm-abs) through all the scaling and selection to the MESA input ( spindle-output)
Chris M
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20 Mar 2017 07:53 - 20 Mar 2017 07:53 #89931
by cmorley
Replied by cmorley on topic Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
ok I think I found the real problem this signal line in the main HAL file
net spindle-vel-cmd-rpm-abs => hm2_7i76e.0.7i76.0.0.spinout
should be:
net spindle-output => hm2_7i76e.0.7i76.0.0.spinout
Chris M
net spindle-vel-cmd-rpm-abs => hm2_7i76e.0.7i76.0.0.spinout
should be:
net spindle-output => hm2_7i76e.0.7i76.0.0.spinout
Chris M
Last edit: 20 Mar 2017 07:53 by cmorley. Reason: missspelled output
The following user(s) said Thank You: cut2cut
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21 Mar 2017 02:33 - 21 Mar 2017 02:33 #89981
by cut2cut
THANK YOU Chris ! .That did the trick... and now I should be able to make chips!
So, is that some issue with PnCconf, LinuxCNC or possibly "user error" ?
Cheers,
Jake
Replied by cut2cut on topic Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
ok I think I found the real problem this signal line in the main HAL file
net spindle-vel-cmd-rpm-abs => hm2_7i76e.0.7i76.0.0.spinout
should be:
net spindle-output => hm2_7i76e.0.7i76.0.0.spinout
Chris M
THANK YOU Chris ! .That did the trick... and now I should be able to make chips!
So, is that some issue with PnCconf, LinuxCNC or possibly "user error" ?
Cheers,
Jake
Last edit: 21 Mar 2017 02:33 by cut2cut.
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21 Mar 2017 04:37 #89982
by cmorley
Replied by cmorley on topic Mesa 7i76e-spindle speed variable via spindle override but not via G-code / M
This is a pnc bug.
Thanks for testing - I will push a fix.
Sorry for the problem.
Have fun!
Chris M
Thanks for testing - I will push a fix.
Sorry for the problem.
Have fun!
Chris M
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- Configuring LinuxCNC
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