Trammel (beam compass) plan

Anyone who is at least a little into crafts must have encountered the problem of drawing a larger diameter circle on a workpiece surface. To draw such circles, you can use a piece of rope, with one end fixed to the center of the circle in some way, and a pen attached to the other end. The circle drawn in this way is not very precise and the process itself is quite arduous. If you don't need a precise circle and don't have to draw it too often, this way may be quite useful, though. If, on the other hand, you are in frequent need for a precise large diameter circle, then a quality trammel, whose design plan is offered here, will definitely come in handy! As you can see in the picture, the construction of the trammel is very simple. It is suitable for drawing circles on wood, metal plastic, stone, etc., and its use is also very simple and efficient. To draw circles on metal, a pointed bar with handle is used (as shown in the picture), and to draw on wood or plastic, a pen is fixed to the trammel. Adjust the bar length (Bar – Part 1) to the diameter of the circle(s) you want to draw.