Ap863 Users’ Guide Page 11 of 18A mechanical/optical paper sensor acts on the left-hand face of the paper roll, and switches when afew metres of paper remain. To avoid spurious 'paper low' reports, ensure that the roll is correctlylocated on the bosses, and that the right-hand paper support has returned to the vertical position. Afoam pad is fitted behind the right-hand support on some models to maintain the correct pressure.Either or both of these paper sensors may be set up under software control to report these conditionsby serial data to the host or changes in the LED colour patterns. Please refer to the Programmers’Guide for details of how to set up the Ap863 for these functions.The Ap863 can be programmed to enter spooling mode if the paper runs low (see Section 7.2 of thisGuide). To exit the spooling mode and print out any stored data, double-click the paper feed button(see above). Please refer to the Programmers’ Guide for details of how to set up the Ap863 for thesefunctions.5.3 REMOVING PAPER OR CLEARING A JAMIf some paper remains in the printer when a new roll is required or a paper jam has occurred, youneed to take special care not to pull the paper out of the printer in a reverse direction.CAUTION: Always raise the paper release lever (a bright green lever at the right hand side ofthe mechanism) before removing paper. Do not pull the paper in either directionwithout first raising the lever, or you may cause permanent damage.When it is necessary to remove the paper from the mechanism, for example when replacing the paperbefore the end of a roll, or to clear a paper jam, proceed as follows:ü Tear off any paper coming out of the paper exit slotü Open the printer cover, and lift the bright green paper release leverü Carefully pull the paper back out of the mechanismü Load a new roll of paper as described aboveü Double-clicking the paper feed button will print out any stored data, if the printer was inspooling mode. Refer to Section 7.2.