I made this with cheap 3 pin rotary encoders in mind. I had a couple lying around and the thing I remixed from was the first one that worked off the bat.

It's a great design and very robust and, so far i haven't had any false notifications from it.

I remixed this from https://www.thingiverse.com/thing:6114701.

There are two variants one for mounting on a wall or an extrusion and another for mounting on my direct drive hot end.

The different versions are different mounting options and currently V3 of both is what i am using.

There are two different wheels for the different size springs that you have available.

Custom CoreXY

No

0.2

30%

PLA will work but PETG is better closer to the hot end.
The Wheel must be out of TPU

10K Resistor on pin one and the sensor wire
+5v on the other side of the 10k
Ground on the middle pin. The third pin is not necessary as direction is not relevant in this case.

1 x 608 Bearing
1 x M6x25 Screw for mounting bearing. Use washer between plastic and bearing.
4 x M4x20 Cap screws
2 Pieces of PTFE tube, size to own liking.
1 x 6mm Rotary encoder see pics