If you are building a Mini Kossel with an open belt (vs. the vanilla version that uses a closed belt) you will need a way to close it to form a continuous loop.
Some design considerations:
- holding force
- high stiffness to minimize hysteresis
- ease of installation
- allowing for excess belt length to spill out
After several iterations I settled on this type of a design. The SCAD is included and is fully parametric. The STL corresponds to a 6mm wide GT2 timing belt.
It should be impossible for the belts to clip unless the belt clip itself deforms, which is why you want a relatively high infill. If your belt teeth are getting squished rather than fitting into the clip then consider increasing tooth_radius in the SCAD.
1) Print with at least 50% infill.
2) Insert your belt. The fit should be quite tight.