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« on: January 17, 2011, 03:12:25 AM »
Your X Y and Z limit switches are likely Normally Closed switches and are often linked in series on machine tools, some I have seen are just in series for each axis, some are all axis.
In Mach you can have them any way you wish but the normal way, which is to conserve inputs, is to have all home and limit switches Normally closed and in series.
Now your machine, if the limits are normally closed then I think I would just wire all axis limits in series and just use a single input for all axis limit switches.
Home switches could either be removed and the limits set up to home switches or you could leave them in place and use 3 inputs, one for each axis home.
For the Z and the toolchanger you are going to need to keep the home switch I think as you will need that for your tool change macro, you could of course do without it and use machine coords but personally I would keep it.
On my machines I have servo drives that are capable of homing to switch then index and for that reason I have separate home switches but all of my limits between axis are wired in series and just use one input to Mach.
Hood