Patent ID: 9553542
Date: 2017-01-24
CPC Classifications: B23D,B25D,H02P

Claim:
1. A power tool which drives a tool bit and performs a predetermined operation on a workpiece, comprising: a motor, a driving member which is driven by the motor and reciprocated, wherein the driving member drives the tool bit by means of its reciprocating movement, and a controller which controls the motor, wherein, in a driving cycle which is defined by a forward movement stroke and a backward movement stroke of the driving member, the power tool is configured to perform the predetermined operation on the workpiece by the tool bit in response to one stroke among the forward and backward movement strokes, a control factor for controlling a driving of the motor is defined by at least one of a voltage value of a voltage applied on the motor and a duty ratio of a driving pulse signal utilized to drive the motor, and the controller is configured to set the control factor in said one stroke to be larger than that in another stroke and drive the motor.