Hello woffler,
I have looked at the DMM breakout board and with the exception of the
PWM spindle control, it should work with a PMDX-422. The PMDX-422
can provide a PWM signal on pin 14 or pin 16 but the DMM board wants
PWM on pin 1. It would be possible to create a scramble wire cable to
resolve this, but I think you would be better served to use a PMDX-407
spindle control with a PMDX-422 or PMDX-410.
Neither the PMDX-407 or the PMDX-410 is for sale yet. They should both
be available by the end of December. The PMDX-407 will generate the
analog speed signal, and also the spindle run signal. It does this using
internal signals and does not consume any of the outputs on the emulated
parallel port. The PMDX-410 is a sub-set of the PMDX-422 that provides
only a ribbon header for the parallel port cable. It does not include the
screw terminals and relay. It will be less expensive than the PMDX-422.