The SIDOOR ATD420W machine tool door drive is an intelligent door control system that enables protective doors on machine tools to be opened and closed at adjustable speeds and accelerations.

The maintenance-free, variable speed drive unit comprises a DC motor with non-self-locking gearing.

The door width and the "OPEN"/"CLOSE" positions are determined automatically.

The current operating states are shown on a 7?segment display directly in the SIDOOR ATD420W machine tool door drive. They can also be displayed externally using the Software Kit or Service Tool, see "Additional units".