Systems and methods for controlling a power tool motor after a shutdown event. An example power tool includes a motor, a trigger, and a controller connected to the trigger and the motor. The controller is configured to provide, in response to actuation of the trigger, power to the motor at a first power level and initiate, based on a characteristic of the power tool, a shutdown event. The controller is configured to provide, in response to continued actuation of the trigger after the initiation of the shutdown event, power to the motor at a second power level, and brake, in response to the trigger no longer being actuated, the motor.

A powered fastener driver includes a housing, a cylinder within the housing, the cylinder containing a pressurized gas, a piston within the cylinder and movable from a top-dead-center position to a bottom-dead-center position, a driver blade movably coupled to the piston, a lifter, a drive unit configured to provide torque to the lifter, and a sensor. The driver blade has a plurality of teeth. The sensor is configured to detect one or more of the plurality of teeth and a controller in communication with the drive unit and the sensor. The controller is configured to count a number of the plurality of teeth detected by the sensor, compare the number of detected teeth to a predetermined number of teeth, and stop the drive unit when the number of detected teeth is less than the predetermined number of teeth.

A hybrid power system including a control core, a driving mechanism, an internal combustion engine, an electric motor, and a storage battery is provided. The driving mechanism is controlled by the control core. The internal combustion engine is connected to the driving mechanism and controlled by the control core. The electric motor is connected to the driving mechanism and controlled by the control core. The storage battery is coupled to the electric motor and the control core. In response to a required torque being input to the control core, the control core executes an equivalent consumption minimization strategy and actuates the internal combustion engine and/or the electric motor to transmit power to the driving mechanism.

Systems and methods for implementing an electronic clutch in a powered fastener driver. One fastener driver includes a motor, a trigger, a position sensor, a speed sensor, and a controller. The position sensor is configured to sense a position of the lifting assembly. The speed sensor is configured to sense a speed of the motor. The controller is configured to provide power to the motor. The controller is configured to receive speed signals from the speed sensor indicative of the speed of the motor, and determine whether the speed of the motor has dropped by a speed drop threshold within a first period of time. The controller is configured to activate an electronic clutch to electronically brake the motor for a second period of time. In response to the second period of time having passed, the controller is configured to provide power to the motor.