Spindle speed wacky

Hey all:
(LinuxCNC 2.8.4, Debian 10, Probe Basic, Mesa 7i76e card)

I just redid my LinuxCNC computer in order to switch to the Probe Basic interface.    Almost everything is working as expected, except the spindle controls.    As i move the spindle speed slider going forward, the speed is all over the place (i.e when the slider is at 10%, the speed is 400rpm, at 30% its at max speed, at 50% it's down to 1000rpm, etc)

Also I have no speed control in reverse.   Note that the spindle control was working on the old box in the QTDragon interface.

Thanks.

 

Did you change the hal file?

I copied the values over from the old hal and ini files.

Can you post you current hal/ini files?

Here you go.   

   
Ini file: 

I see at least one issue:

net spindle-vel-cmd-rpm => pid.s.command

should be

net spindle-vel-cmd-rpm-abs => pid.s.command

Tried that. If fixed the reverse speed control, so now both forward and reverse have the wackiness with the slider.

Moving the slider down from 100%, the spindle slows as it approaches arounf 65%, then goes to full speed and repeats the process at around 35%.

In addition to the -abs change, these items in the ini file should be changed


OUTPUT_SCALE = 5000
(was 100)
OUTPUT_MIN_LIMIT = 0
(was -5000)

Thanks PCW - that fixed the wackiness with the slider. However, the spindle is now truning at 300rpm at 100% (it should be running at 5000)

I would check (with halshow)

hm2_7i76e.0.7i76.0.0.spinout-scalemax

hm2_7i76e.0.7i76.0.0.spinout

And check (with a voltmeter)

The spindle 10V supply (TB4 pin 3)
and output voltage (TB4 pin 2),
both relative to TB4 pin1