Limit Switches with LED's

[JAZZCNC]

Ray think you may be mixing up soft limits with homing and physical limit switches. Soft limits have nothing to do with Actual physical limit switches they are just a software version of a limit switch and use the machine coordinate system has reference.
In fact with soft limits defined which you usually setup to be just less than the machines physical hard stop range then it's very easy to crash the machine into the hard stops because when you RefAllHome without Physical Home switches Mach just Zeros out Machine coords where ever it's parked.
So if you happen to RefAllHome with the table or Gantry say towards the middle of movement range then Mach use's this Zero coord has the start point for soft limits and if for instance you set-up soft limits with a movement range of 500 positive before soft limits kick-in but you only have 400 physical movement left then Mach won't know and crash into stops.!!

Soft limits have absolutely nothing to do with home switches at all other than they share the same setup menu in Mach.

Personally I use separate Limit switches wired in series using one input on the Bob. Then have separate Home switch's wired in series using another input of the BOB.
You only need 1 home switch per Axis.

To set-up Home switches in Mach first set the input your using in Ports&pins/input-signals. You really have 3 options now.
If sharing LIMIT switches has home switches then set each Axis Home signal to the same input your using for limits from the BOB.
Same has above for separate Home switches if your using them wired in series just using the different input from BOB.
If using individual home switches then you'll need to set each Axis signal with the individual Input used on BOB.

Next in the Home/soft-limits menu set which way you want the machine to set off looking for the home position using the HomeNeg selection.
In this same Menu you can define other things like auto zeroing the DRO's after hitting switch and percentage of Rapid speed to home at.

Thats all there is too it.