dear friends,
I have TA8435H 5 axis driver board with spindle connector on it. but spindle connector has 3 outputs. M4, M- and GND. as I understood mach3 sontrols spindle somehow like stepper motors. I need information to control my spindle (standard dremel motor). I actually just meed to open and close a relay with mach3 but I could not succeeded. simple circuits or any documents would be great.This driver board has not enough documentation.

best regards.