A1 Pen Plotter

I designed this pen plotter for my Bambu Lab A1 to help my daughter with homework, party decorations, and creative projects. The design uses a simple rubber band mechanism to keep the pen in constant contact with the paper. It also relies on modified G-code to function correctly, so please use it at your own risk. The model comes pre-supported, and I’ve also included a version without supports for those who prefer to tweak their own settings. Printer setup Replace the cover and set the plotter to the raised (up) position. Place the paper on the build plate (use multiple sheets to avoid scratching the surface) and secure it with magnets. Make sure it is firmly fixed, as the bed will heat up to around 20°C (minimum required for the printer to operate), which may cause the paper to warp slightly. Home the printer. Lower the plotter and insert the pen or pencil into the holder, making sure the tip is touching the paper. Tighten it in place. Raise the plotter back to the upper position. How