We have a board, the PMDX-407-S, that can be added externally
to provide variable speed spindle control with the PMDX-340.
This board requires a reference voltage from the spindle driver
or its interface. The LMS upgrade kit board can supply 5 volts
for this purpose.
This board provides an output that can control the Start/Stop
input to the LMS upgrade board, but does not provide any
on-board support for reversing the spindle. The PMDX-407-S
uses the pin 16 signal from the PMDX-340, so the pin 14
signal could be used for direction if desired. This could be
a direct connection if my assumption that the upgrade kit
provides electrical isolation is correct.
The suitability of using 5 volts as the reference to generate
the 0 - 10 volt AVI signal is unknown. The adjustment pot
on the upgrade kit may have enough range that this is not
a problem. If it is, then we should be able to use the +12
volts from the PMDX-340.
