Electric pulse tool with controlled reaction force

A method of controlling an electric power tool, configured to perform tightening operations where torque is delivered in a series of pulses to tighten screw joints, the electric power tool comprising an electrical motor adapted to drive a rotating shaft of the electric power tool, the electric motor adapted to be fed with a train of controlled current pulses, the electric power tool further comprising an angle sensor for sensing a parameter related to an angular displacement of the electric power tool, wherein a current supplied in the current pulses is controlled based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool.

A controller controlling an electric power tool, configured to perform tightening operations where torque is delivered in a series of pulses to tighten screw joints, the electric power tool comprising an electrical motor adapted to drive a rotating shaft of the electric power tool, the electric motor adapted to be fed with a train of controlled current pulses, the electric power tool further comprising an angle sensor for sensing a parameter related to an angular displacement of the electric power tool, wherein the controller is adapted to control a current supplied in the current pulses based at least in part on an output signal from the angle sensor to not exceed a limit threshold value for the parameter related to an angular displacement of the electric power tool.