Improved Pulley with lower slippage and better guidance

thingiverse

Here are the tolerances: two levels for clamping calculated, and one for printing included. There's a chance we can balance this out. The belt guide needs improvement too. You'll need these additional parts: six Nuts M3 and six screws M3 x 10. Follow these instructions carefully: 1) Print the part. 2) Rework those holes! 3) Make nut bins free by using a soldering iron. This will save you some hassle. 4) Press those nuts in place firmly. Now hit them gently with a drift punch to center them perfectly. 5) Slightly turn those screws clockwise. 6) Put this thing over the axis, at exactly the same height as your spanners. Easy does it! 7) Grab hold of these screws while carefully sliding that pulley onto its new axis. Don't apply too much force here; you don't want any damage done! 8) Loosen those screws just a bit so the original arm can hold this together properly. 9) Get your hands on top holder from left side back guide – we'll need some gliding motion happening next! So give it a few twists. 10) Without putting too much force on it, just run that belt around and let things get cozy in its new spot on the axis. That's all there is to it.