Pen holder for plotting - flat backing plate designed to attach with velcro/command strips to any flat part of the print head. Heavily inspired by another model I saw on here but modified to fit my printer. Made this to be able to accommodate variable pen sizes, up to 11.5mm in diameter. It's designed in 2 parts, the pen holder, and a sliding pin that will clamp a pen in place with a little M5 bolt. Slider has little grooves cut into it so that once you've set the pen height with the bolt, you can remove the pen and put another identical pen in and it should drop to the same height. I've been using it with brush tip pens so keeping the same height means I can get consistent line widths and it's doing the job well.

Anycubic

Kobra

No

Yes

0.3

25

I print with supports but haven't tried it without because my printer is old and bad - your printer might be able to do it without

Tolerance on the sliding part is very low, can be a bit fiddly to seat it properly in the recess - I didn't do any sanding or anything but depending on your print settings/nozzle you might need to do some trimming/sanding to seat it properly

Bolt hole is a tiny bit smaller than than the actual diameter of the bolt, then once printed I thread the hole using the bolt and an allen key, after a couple passes back and forth it should be easy to tighten/loosen by hand