A print engine assembly includes a sensor to monitor for a user pulling at
a free end of print media. A processor is coupled to the sensor and
configured to operate a guillotine to sever the print media before
potentially damaging forces can be transmitted to the print engine
assembly. The processor is preferably also configured to restart a
printing procedure upon the guillotine being operated. In one embodiment
the sensor comprises an optical sensor. The optical sensor monitors a
small plastic flag to detect deflections that occur on paper drive
rollers of the print engine assembly when the print media is pulled.