Mesa 7i76e to Delta VFD-e

Yes just CW and CCW (and the analog out) are used

PCW,
well, i got most of it working, even with pid.
Unfortunately, the spindle encoder is actually a simple hall sensor with 4 magnets in the spindle shaft....so only a single signal.

so the encoder velocity is always positive....for the spindle turning either direction.

If I use absolute values for the pid the spindle is stable, but only turns in one direction, no matter the command as forward or reverse....
Usable for simple machining, but certainly not for tapping, which is what I definitely need.

I considered using a cludge of logics to change the DIR signal, and rerouting the modified DIR signal to a different GPIO pin, thereby getting the correct direction signal to the SPIX1 board.

of course, installing a real encoder.....pretty difficult to do at this time.

Any thoughts....?????

Rigid tapping needs a real encoder with A and B
otherwise LinuxCNC has no idea when motion reverses

(It also requires an index signal)

that's what I thought...........