I designed this thing for people with sensitivity issues after a stroke. You just have to recycle a BIC pen refill.
Compared to a normal pen, it allows a better grip thanks to its increased diameter and the knurled part gives a more sensitive sensation when writing.
UPDATED 11/15/2018 :
- added version with small hole.
- added model with smoother pattern (d13), thanks Hexamus
UPDATED 09/08/2018 :
- added fusion360 and STEP files for remix as asked by macandnews .
UPDATED 10/06/2018 :
- added scad file to engrave name or other words like a proverb on the pen
Speed : 60 mm/s
Vertical orientation with 5 mm brim.