A method serves for detecting the touch contact of an operator-controlled element of a machine by a user. The inverter is operated based on the rotational speed and the requested torque determined by the control device, and the control unit changes a limit of the torque in accordance with an inverter voltage which is a voltage applied to a frequency conversion portion provided in the inverter. Then, a shrink seal is applied which completes the sealing process at the first side of the lamp body by sealing an inner junction area on the same side of the lamp body. The lip is configured to contact the upper edge of the basin such that the bucket is suspended in the basin. A link limits the upward advancement of a top portion of the door. A method and system are provided for detecting and controlling power levels independent of such load conditions.