i just got a denford for myself
its fitted with control techniques lynx08 drive- not sprint.
havnt checked fully but according to the manual its isolated on all inputs . (havnt confirmed with meter yet)
problem is its unidirectional.
was thinking it should be ok to tap down, un enable , reverse polarity with contactor and re enable to reverse,
it looks like the tacho feed is fed into a bridge- so was hoping it would be ok running reverse. - anyone know?

anyway- thats preliminary thought. any wise men on here tried it?
or would it be better to swap out the dc motor for ac and run it with vfd?

annoyingly i dont have 3 phase- so il be swapping out the old fanuc drives/motors anyway