Sisyphus

[stormer]

Furthermore:
- Rubber bumpers that stick out allmost as much as the end sensors on the x and y axes may save the thing in case of an end sensor failure. To find space for the bumpers on the z axis is more tricky, but there are doughnut shaped solutions, that mount right around the spindle end bearings or around the nuts.
- Concerning the mentioned axial versus the tangential use of these type of approach-sensors: To my experience, the axial use you have chosen is far more precise (repettitive correctness). That would also improve such an end sensor as an absolute home sensor, if you intend to use them that way.
- To avoid destruction of the sensors in case of collision, I use plastic (printed) adaptors around them, which will break under stress, so that the sensors will just be pushed through their larger mounting holes.