Stitcher system with out of wire detector

A stitcher system includes a stitcher mechanism for stitching collations of documents and adapted to form stitches from a conductive wire moved into the stitcher mechanism. A non-conductive spool is mounted for rotation on a spindle. A conductive wire is wound on the non-conductive spool. The conductive wire has a tail end adjacent to the non-conductive spool and a lead end remote from the spool. The spool rotates when the conductive wire is moved into the stitcher mechanism to provide conductive wire to be used by the stitcher mechanism to form stitches. A sensing circuit is provided with a circuit path that includes the conductive wire wrapped on the non-conductive spool and a conductive member mounted to engage the wire. The sensing circuit path becomes open when the conductive wire is not wrapped on the non-conductive spool to thereby detect an out of wire condition.