pen-plotter

A parametric OpenSCAD design for a pen plotter built onto the X axis of an existing machine. A printed carriage hooks over the folded rim of its sheet-metal frame, rides its 8 mm rod and carries two 6 mm Y rods 40 mm apart; a printed head clamps a 10 mm pen and lifts it 8 mm with an SG90 servo. Every dimension, many measured off the original carriage, lives in one params.scad, and the assembly animates the pen lift. BOSL2 and NopSCADlib; seven commits over two days in January 2026.