The unit drive motors are designed to fulfil the requirements for the highest energy efficiency class. If no workpieces are being fed into the machine, they are run down to a low speed and a flap is closed on the suction blower in order to extremely reduce the air throughput. Depending on its actual load, this reduces the energy consumption of the machine quite considerably. When new workpieces are fed into the machine, all motors are rapidly started up again.
If the customer-supplied extraction system provides this option the machine can prevent the airflow through units that are not in operation by controlling closure flaps attached to the individual extraction hoods and thus make the extraction system save energy.