“I designed this machine to draw custom, round drink coasters. I already have a laser cutter for square coasters and I wanted to try something unique for round coaster.
The machine first touches off on a switch to home the linear axis. It then completes the drawing. All structural parts are 3D printed. The motors are NEMA 14 stepper motors. The pen is lifted by a small hobby servo. The firmware is Grbl with a small modification to use the servo.”