Update

Added v3 with a small square to match the notch of the Nema 17 motor shaft. If your motor doesn't have one, simply use v2. These parts encounter high mechanical stress, make sure you add enough walls (I used 5) and infill.

Why?

I noticed my fishing line moving up and down the pulley and sometimes even trying to go up the slopes which leads to different amounts of line movement per revolution. This might be the cause for drifting in prints, still investigating.

Instructions

To be used with Nema17 motor. Loop the fishing line 2-3 times around the pulleys and make sure to tighten it up! I'm using 0.28mm line which holds a force up to 36kg at the moment with very good results. (BERKLEY "Black Velvet")

Da Vinci Jr. Pro

Doesn't Matter

No

0.1mm

85%