Yes, I used 16 microsteps for every stepper driver.
I’m sure that you already did it but, just to be sure:
- Have you tried with other stepper driver?
- Have you tried to move a normal stepper with the same driver that is not moving the stepper with the mechanical reduction?
- Have you tried to adjust the current of the driver?
- Have you checked that the coils of the motor are ok? And the wires of the coils are well placed: A1-A2-B1-B2
Tell me if you already have checked this or you are not sure about how to check something!