Which is "the" controller, or do you mean a generic controller?
The stepper driver itself can take VMOT from anywhere. When plugged into a controller board, VMOT is usually tied to heaters or other stuff. MOTGND is also usually connected to Logic GND on the controller.
But if your stepper is not plugged into a controller (or you have designed your own) then VMOT and MOTGND can be independent.
The stepper driver itself can take VMOT from anywhere. When plugged into a controller board, VMOT is usually tied to heaters or other stuff. MOTGND is also usually connected to Logic GND on the controller.
But if your stepper is not plugged into a controller (or you have designed your own) then VMOT and MOTGND can be independent.