and then the code takes it to 4200 for finish pass or something and
then the code takes it to 3500, the spindle slows to a stop.

anyway around this? It will speed up, but will not slow down, it
will only stop if a lower rpm is chosen.

i just now checked that if i manually set spidle to 4000 and click the spindle speed down button, it shuts it off.  this is on a tormach.

can anyone duplicate this?