The machine features full-wave phase control electronics with the following features:
Smooth start-up The electronically controlled smooth start-up ensures that the machine starts up jolt-free. The pre-selected motor speed is maintained on a constant level. Electronic controls ensure a steady cutting speed even when operating under different loads. The available speed when the ON/OFF switch [1-4] is pressed down fully can be set  between 600 and 1400 rpm (RAP 150-14) or 900 and 2100 rpm (RAP 150-21) using the adjusting wheel. This enables you to optimise the cutting speed to suit the surface (see table).