Patent ID: 9673740
Date: 2017-06-06
CPC Classifications: H02P

Claim:
1. A system for determining a microstep rotor offset of a stepper motor, comprising: a microcontroller configured to control voltage applied to a first coil and a second coil provided to operate the stepper motor; a back electro-magnetic force (BEMF) detection circuit configured to detect BEMF generated from the stepper motor, wherein the stepper motor drives a pointer with a pointer stop, and the system is configured to: wherein homing the stepper motor further comprises: enabling the stepper motor's drive signal; introducing a first delay to allow a first power coil and a second power coil to power up; moving the pointer to the pointer stop via a homing instruction received via the microcontroller; introducing a second delay after the moving; and initializing a loop counter register.