Patent ID: 8857692

Claim:
A fastener driving tool comprising: a motor; a DC power supply that supplies electrical power to the motor; a magazine that supplies fasteners to a nose; a plunger that is driven by the motor to move between an upper dead point and a lower dead point; a blade connected to the plunger for driving the fasteners supplied to the nose; a drive spring that urges the plunger downwards, and that is capable of being compressed upwards; a spring compression drive unit that moves the plunger in a compression direction of the drive spring using a drive force of the motor, and that moves the plunger downwards by releasing the compressed spring; a first operation switch that detects a first user operation; a second operation switch that detects a second user operation; an operation detection sensor that detects a drive state of the spring compression drive unit to produce a detection signal; and a controller that controls starting, stopping, and rotational speed of the motor based on detection signals from the first operation switch, the second operation switch, and the operation detection sensor, the controller including means for providing a pulse width modulation signal to the motor to reduce the rotational speed of the motor based on the detection signal which is output from the operation detection sensor when the operation detection sensor detects that the plunger is moved again to an initial position close to the upper dead point by the drive force of the motor after the plunger is moved to the lower dead point.