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When LinuxCNC is running and you have the spindle on and set to say 1/2 speed.
what does:

halcmd show all spin*

report?

Also, you can get an idea of PWM operation independent of any add-on cards
with just a voltmeter, as the voltmeter will read the average voltage which will
be proportional to the PWM duty cycle.

 

I contributed the support for the 7i95t in pncconf. I don't have any 7i97s to try but if there is a similar card already supported in pncconf I could add support for it...I'm just not sure if it supports analog servos though.

I also did some initial work to add qtplasmac support to mesact but there are some fairly major internal assumptions about encoder 0 going to drive 0, etc. and I didn't want to make backwards compatible breaking changes without hearing from JT.

sorry guys, problem solved with debouncing..

The 7C81 only has the option of all pullups and all pulldowns
on its I/O ports.

Simplest solution would probably be to add a stiff pulldown (say 620 ohms)
on the relay I/O pin. There is a firmware option for fixed parallel port type I/O
but currently its global (not per port), This firmware makes the parallel port
output pins default to outputs instead of inputs at startup or watchdog bite
What firmware are you using?