By the fact that frictional braking

摘要

PROBLEM TO BE SOLVED: To provide a torque control method for a power rotating tool capable of properly and effectively carrying out a constant torque tightening work of a screw or the like, and of easily minimizing the whole unit and improving as accuracy of torque control. ;SOLUTION: A target angle change rate limit value which limits a change rate of the target angle (the target value of the rotational phase) is set and controlled on the basis of the advance and delay angle control directions, and engine speed.;COPYRIGHT: (C)2003,JPO