Method for operating a power tool
AssigneeRobert Bosch GmbH
InventorChi Hoe Leong
Life of this patent
Estimating the term…
Abstract
A method for operating a power tool for screwing a screw into a workpiece. After an activation of the power tool, an electric motor is driven in order to screw the screw into the workpiece. The rotation speed of the electric motor while the screw is being screwed in is ascertained during a predefined initial time of an impact operating mode of the power tool. A rotation speed of the electric motor is ascertained after the initial time. A torque of the electric motor is at least reduced if the ascertained rotation speed of the electric motor exceeds a predefined rotation speed limit.
Claims15
A method for operating a power tool for screwing a screw into a workpiece, comprising:
- after an activation of the power tool, driving an electric motor to screw the screw into the workpiece;
- ascertaining a rotation speed of the electric motor, while the screw is being screwed in, during a predefined initial time of an impact operating mode of the power tool;
- ascertaining a rotation speed of the electric motor after the initial time;
- and
- at least reducing a torque of the electric motor if the ascertained rotation speed of the electric motor exceeds a predefined rotation speed limit.
A control device for operating a power tool for screwing a screw into a workpiece, the control device designed to:
- after an activation of the power tool, drive an electric motor to screw the screw into the workpiece;
- ascertain a rotation speed of the electric motor, while the screw is being screwed in, during a predefined initial time of an impact operating mode of the power tool;
- ascertain a rotation speed of the electric motor after the initial time;
- and
- at least reduce a torque of the electric motor if the ascertained rotation speed of the electric motor exceeds a predefined rotation speed limit.
A power tool having a control device, the control device for operating the power tool for screwing a screw into a workpiece, the control device designed to:
- after an activation of the power tool, drive an electric motor to screw the screw into the workpiece;
- ascertain a rotation speed of the electric motor, while the screw is being screwed in, during a predefined initial time of an impact operating mode of the power tool;
- ascertain a rotation speed of the electric motor after the initial time;
- and
- at least reduce a torque of the electric motor if the ascertained rotation speed of the electric motor exceeds a predefined rotation speed limit.
Dependencies are inferred from the claim text.