Kossel Linear Plus Plugin for Drawing
I designed this pluging to connect a permanent pen next to the hotend for drawing, for example a copper PCB.
I only have to remove my 3mm cristal bed, send G1 Z0 to the printer to reach the bottom and adjunt the pen for touching the paper or PCB that you want to draw.
Them home again and start drawing.
To export any drawing or pdf to gcode i use Inkscape 0.92.4 software