@RueNahcMohr@infosec.exchange in this case the problem is not "mechanical" (even if I'm literally taping the pen to a 3D printer 😅), but the software stack... I can't obtain a valid gcode consistently... I'm using a patchwork of programs from Kicad to Inkscape and modifying the gcode manually... 🫣 I remember your setup, if I'm not wrong you use a proprietary dos program to route the circuit and drive the plotter, right? Does your plotter run gcode or does it have its own protocol?