I wish to control a router spindle from VFD via Mach. Unfortunately, I do not have a schematic/manual for the BOB. Nor can I get the seller to provide information beyond that the feature is on the BOB.
I found a dull and corroded terminal pair that were away from the rest. I guessed at the pin. I am able to switch the spindle on and measure 2 volts at the terminal. That's the end of progress.
The terminal seems to have a sub-board section related to just that pair. There is a pot on that section. Dialing the pot does not change the voltage.
If I have found the correct terminal then the issue is within Mach. How do I best configure Mach in order positively identify the terminal and set the voltage range?