@vxo @tubetime a servo driven XY frame is old hat now, so many homebrew 3D printer, plotter, Dremel CNC router, card cutter, or laser engraver systems based on that! I reckon the roll fed compact plotter design would be a novel and interesting variation... Elastomeric tube over shaft so7nfs good to me. I remember an aluminium bar running along the front that drove the Z axis to push the pen onto the paper. I can't remember how the pen was transferred between head and changer though?
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