BRAILLO
l
B 650 SW2.1
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8. ROLL UNWINDER
8.1
Description of functions
The Roll Unwinder’s main function is to automatically supply the printer with the correct amount of
paper. This is done using a laser sensor that sences the distance down to the paper. If the distance is
getting shorter, the RU will feed paper faster, and if the distance is getting longer it will feed slower. If
the printer stops, the paper will also stop completely.
The feeding is done by leading the paper in between two rolls, where one has a built-in motor. The
other roll is pressing against the motor roll by a pneumatic cylinder. When the paper feeding stops,
the pressure on the pneumatic cylinder is released.
Laser
distance sensor
On/Off switch
