Patent ID: 8054029
Filing Date: 2011-11-08
Classification: G05B

Abstract:
1. A calibration method for a servo, wherein the servo comprises a motor and a moved member, the moved member being driven by the motor to move between a first limit position and a second limit position, a moving path of the moved member forming an actual coordinate, a displacement and a rotating direction of the motor forming a motor coordinate, the method comprising the steps of: activating the motor at a low-speed mode to drive the moved member moving toward the first limit position; monitoring a motor control power of the motor continuously, and determining whether the motor control power exceeds a threshold value; determining a motor coordinate value corresponding to the first limit position when the motor control power exceeds the threshold value; activating the motor at the low-speed mode to drive the moved member moving toward the second limit position; monitoring the motor control power of the motor continuously, and determining whether the motor control power of the motor exceeds the threshold value; determining another motor coordinate value corresponding to the second limit position when the motor control power exceeds the threshold value; and deriving a conversion relation between the motor coordinate and the actual coordinate by using the actual coordinate value of the first limit position, the actual coordinate value of the second limit position, the motor coordinate value corresponding to the first limit position, and the motor coordinate value corresponding to the second limit position.