Used to increase the input roll capacity, it unwinds automatically the rolls having face-out labels only. The position of the tension arm is calibrated as follows. When the printer forwards the media for printing, the tension arm goes up, the device unwinds the media. When the tension arm is in the middle position, the device is idle. When the printer pulls back the media, the tension arm goes down, the device rewinds it.
The Unwinder can be purchased with the Rewinder and a Plate that will lock all three parts together to the printer. This way the correct unwinding/rewinding operations are guaranteed and units are safely aligned with the printer. An external power supply 100/240VAC - 2.5A at 24V allows an electronic circuit to provide, through the tension arm, the automatic adjustment of the rotation direction and speed.