Patent ID: 7208904

Claim:
A position controller for a motor, the motor having an advance control input for moving the motor in an advance direction and a retard input for moving the motor in a retard direction, the controller additionally comprising: an advance operator input push button for providing a control input; a first advance digital counter, arranged to count in response to the control input, a number of cycles of a reference clock that equal a predetermined advance period of time (TG 3 ), generating a first motor advance signal to be applied to the motor advance control input for a time period at least equal to TG 3 ; a retard digital counter, arranged to count after expiration of time TG 3 , a number of cycles of a reference clock that equal a predetermined retard period of time (TG 2 ); generating a motor retard signal to be applied to the motor retard control input for a time period at least equal to TG 2 ; a second advance digital counter, arranged to count after expiration of time TG 2 , a number of cycles of a reference clock that equal a predetermined advance-retard period of time (TG 1 ); generating a second motor advance signal to be applied to the motor advance control input for a time period at least equal to TG 1 .