Patent ID: 11858105
Assignee: ATLAS COPCO INDUSTRIAL TECHNIQUE AB
Field: Machine tools (Mechanical engineering)
Classification: CPC B  F | IPC B

Claim 12:
13. A method for controlling a power tool,
wherein the power tool comprises:
a housing;
an input shaft;
an output shaft;
a motor;
a two-speed power transmission according to claim 1;
means for monitoring a quantity indicative of a torque delivered by the tool, wherein said means for monitoring a quantity indicative of a torque delivered by the tool comprises at least one of a torque transducer and a circuit arrangement adapted to monitor the motor current; and
a control unit operative to control the rotational speed of the motor based on said sensed quantity indicative of said torque,

wherein the method comprises:
monitoring a quantity indicative of a first torque value;
comparing said first torque value to a predetermined threshold torque value; and
controlling the rotational speed of the motor when said measured value approaches said threshold value by reducing the rotational speed of the motor when said measured value approaches said threshold value.