Oh. Interesting, and an unambitious design there. That means that the front panel VFD switch is essentially your Spin-Forward On/Off control. There's a couple of options to extend the use of that, however, the job at the moment is to get the spindle turning.

Mach3 was set to use OUTPUT#1, but we now know that is irrelevant for the wiring that you describe.

The above assumes that function parameter F001 is set to 1. (You've not confirmed this yet)

So, you should know how to turn the spindle on/off.... albeit at zero speed. Can you confirm any visual difference on the VFD display with the VFD switch On and Off - I would expect the "Run" LED to illuminate when switch = On, and extinguish when "Off".


Now, spindle speed control. This assumes F002 = 1, also. (You've not confirmed this yet)
If you do confirm its set to 1, then changing to 3 should, according to the manual, give you speed control through the built-in pot. Try that and report back.

If you want spindle speed control through Mach3 - I'm keen to know if you have a DMM and are comfortable using it. Simply - I'd rather see the behaviour of the board rather than the spindle (just removes a potential source of confusion). If I said that I'd like you to measure the output to the AI1 input, wrt ground, are you happy to do so?, and similarly from P12 to ground? (all references are to the VFD).

Where I'm going with this is to verify that, for different spindle demands you can get an analogue voltage out of the board to the VFD. If that doesn't work then no amount of smacking the VFD is going to work. But I'd like you to confirm the above before I start writing an essay. Also, screen shot of Mach3 Pulley set-up window.