No Analog voltage change 7i76e

Need to issue m code to start spindle in MDI mode.

Idiosyncrasies of linuxcnc

Linuxcnc is somewhat sloppy in it's modes (switches modes behind the scenes) and yet rigid at the same time.

That worked. Thanks!
If I issue M3 to start the spindle then further S commands will vary the speed as it should. Thanks again!

For anyone else who has this problem, it appears in pncconfig, I ticked a box to reverse the spindle because it turned the wrong way in the open loop test. I unticked the box and that fixed the ini file -5000. Unticking the box has no effect in the machine operation. My spindle turns the right way per M3 and M4 commands in MDI.