Drag chain and switch type.

[Ollie78]

Cheers for the replies.

I have further questions....


It looks like proximity sensors are a good way to go, no moving parts to go wrong. from what I gather though I will need an extra 24v power supply for these. Why so high a voltage ? I think the switches on my machine were just powered off the 5v BOB

.
Can you get 5v ones? Seems a bit of a pain to have to step down the signal to 5v with resistors etc.

I am also a bit puzzled by the purpose of wiring them in parallel. I guess for just stopping the machine in an emergency it doesn`t matter but if I want to use them for homing won`t I need to tell which one is which. I have 5 inputs on the spare
BOB so one each should be ok.

Is normally closed better so if something breaks they trigger ?

Are this type Ok https://www.ebay.co.uk/itm/TL-Q5MC2-...frcectupt=true
They look easier to mount than the round threaded ones.

As for the energy chains those ARKO ones do look posh, and a good price too. I will investigate the postage / customs implications and see how they compare to the others. I like the little separator bits to guide the cables within the chain, very neat.

Thanks

Ollie