Motorized Plastic Bottle String Slicer

Update 2: Added multiple width files! print in  4mm, 6mm, or 8mm (or even 2mm but i havent tested this skinny yet)

Update 1: Added a slot to put in a PET plastic protector. Just cut a piece of plastic from the bottle part you chopped off and slide it in to stop the bottles from cutting into the 3D print. Print with the longest part facing down. Currently Hacking on this at www.2022.dinacon.org
 

There's lots of simple designs for using a razor and a jig to turn plastic bottles into strings, but they can be finicky with grooved bottles, or bottles that are slightly thicker. 

This motorized version lets you cut through thick bottles like HDPE easily! full design here free https://a360.co/3NPn15b

this design pops right on to a WORX WX081L 4V ZipSnip Cordless Electric Scissors 

Video of it in action

https://www.youtube.com/shorts/hDt4idhYD9c

Prints with no supports.

Currently set to make 8mm slicers to use in Joshua Taylor's http://recreator3d.com/

3D filament making machine!