I have a DRV8805 chip driving an NPM PF35T-48B1 motor. It seems that when the motor goes thru a rotation, the steps look jerky and seems like the resolution should be improved so the rotations become smooth. Also, I'm supplying 5V on the DIR pin which should make the motor rotate clockwise but when I apply power, a lot of the time the motor turns counter clockwise. My questions are:
1. How can I smooth out the rotations?
2. How to I make the motor turn clockwise consistently?
I attached a video I hope you can view. The left unit is the one being driven by the TI DRV8805 chip.