Rotatable electric hand tool with starting security system

摘要

An electrical hand-tool device and start-up safety routine protecting against start-up blockages, in which an electrical motor is connected, for a short time span (T0), with the current supply at a determinable resistance. At least one of a limit value (alphaG) and a shut-off point in time (tA) is determined, for the safety routine in the event of tool blockage, using a measurement of the angle of rotation (phi) of the rotor taken over the time span (T0) dependent on the start-up behavior of a rotor in the time span (T0).