Optical Z-Limit Sensor

An easy to build, easily adjustable consistent optical Z-Axis end stop sensor, that has permanently solved all my bed adhesion problems !

Apart from the printed parts, you will need :-

* 2 M3x50 Screws (These will be used as rails)
* 1 M3 x 30 Screw (this will adjust the height)
* 5 M3 Nuts (2 on each M3x50 to hold the spring in place, 1 for the height adjuster)
* 2 4 X M3 Washers (to sandwich the springs)
* 2 Springs (diameter of around 3.5mm)
* 2 M2 Screws + nuts (can use the ones holding the existing Z-Axis Stop switch)
* 1 1k Resistor (Value not critical, anything from 680ohm to 10k should work)

Full instructions at https://blog.johannfenech.com/?p=917