Earthing?

[Edward]

Changing the subject a little, I read somewhere else in this forum that Dean's sensors are floating - that way it minimises cable runs.I didn't quite know what he means by floating and I'd like to know, maybe from the man himself, if he's reading, please.

I just saw a video by him talking about the repeatability of the cheapo proximity sensors and I think the trigger was the metal of the ballnut flange, or in any case, something that moved past the sensor to trigger it- sideways, rather than front on. So there was no possibility of trigger and sensor crashing into each other. I quite like this and maybe it's common practice to do it this way, although I have seen videos where the machine would crash into the sensor if it overrran a little.
Mind you, if the machine overruns, a crashed sensor is probably the least of the problems:)

Edward