CNC 3018XL: Pen Variations

Cheap 1 mm pens produce scratchy lines:

CNC 3018 - Cheap pen - plain paper
CNC 3018 – Cheap pen – plain paper

More expensive 0.5 mm Pilot Precise V5RT pens produce well-filled lines:

CNC 3018 - Pilot V5RT - plain paper
CNC 3018 – Pilot V5RT – plain paper

Both of those are on plain paper. Better paper would surely improve the results, while moving the cheap pen further into sow’s ear territory.

For reference, the cheap pens use a collet holder:

CNC3018 - Collet pen holder - assembled
CNC3018 – Collet pen holder – assembled

The Pilot V5RT pens use a custom holder:

Pilot V5RT holder - installed
Pilot V5RT holder – installed

A 3D printer really simplifies making things!

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