I received a request to explain how I set up my Job Press to run pre-cut round coaster stock. I thought that probably the best way to explain it is by video, with soundtrack courtesy Iron & Wine.
The video is about seven and a half minutes long. What you will see is the preparation which consists of one sheet of hardboard, one sheet of bond paper for padding, another sheet serving as the Tympan sheet, and a wax paper overlay. The wax paper came from the kitchen. Any transparent sheet - or one that comes close to transparent - will do. We use this to help center the coaster stock to where the printed image falls on the Tympan, after an imprint is made on the wax paper. Once centered, the coaster is held in place, the wax paper removed, a circle is drawn around the coaster, gauge pins are set, and in our case the impression was spot on!