grbl-servo can be used on Arduino to control an X-Y pen plotter, where the pen is operated by a small servo motor such as an SG90 micro servo. Grbl is a no-compromise, high performance, low cost ...

WARNING: CNC systems are inherently dangerous. Use of this hardware and software is at your own risk. I am not an expert at CNC systems, THC's or electrical design. I'm just an embedded software guy ...