Prusa i3 plotter pen holder
thingiverse
This pen holder can help attach pen to extruder carriage, if u want use prusa i3 like plotter. Holes for M3 thread UPD: I make new more functional version https://www.thingiverse.com/thing:2417066 Highly reccomended download new version Print Settings Printer Brand: RepRap Printer: Prusa i3 Rafts: No Supports: No Resolution: 0.1-0.2 Infill: 20%
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