This machine was a real challenge for me to fix. First let me tell you what it does. This is a box stretch wrap bundler. Do you remember years ago when cameras would capture images on light sensitive strips of plastic called film? One of the most popular brands of film was Kodak. The 35mm size came in these little yellow boxes that you bought at the store. The store would get these boxes in bundles. The bundles were stretched wrapped in plastic in a 10 x 12 grid array or something like that. The Pester machine above would receive the boxes one by one off the assembly line and then stack them into a grid array and then push the assembled grid through a wrapper assembly and then on to a heat tunnel, which would cause the plastic to shrink tightly around the boxes thus pulling them together as one BUNDLE.
A rack of circuit boards with embedded logic controlled this machine. The logic was performed by these little Siemens Hybrid Logic Blocks soldered on to each circuit board. Some of these had gone bad and the previous owners instead of fixing the system they tried to build a work around by adding in all kinds of jumpers relays and limit switches. It took me quite sometime to figure out what they had done and undo all the damage and restore the machine to like new condition. See the slide show to see for yourself.