Patent ID: 6246196
Filing Date: 2001-06-12
Classification: E05D,E05F,E05Y,Y10S

Abstract:
A movable barrier operator having automatic force settings, comprising:an electric motor;a transmission connected to the motor to be driven thereby and connectable to the movable barrier to be moved;a circuit for providing a pulse signal comprising a series of pulses;a motor control circuit, responsive to the pulse signal, for starting the motor and for determining the direction of rotation of the motor output shaft;a first force command device for setting a first force limit for use when the motor is rotating in a first direction;a second force command device for setting a second force limit for use when the motor is rotating in a second direction; anda controller responsive to the first force limit and to the second force limit for varying the length of the pulses in the pulse signal, effective for varying the motor speed during travel in the first direction and in the second direction.