Steve. I assume that it was fitted with homing switches (as was my own vmc190)
If so I just set up soft limits which effectively provides ‘virtual’ limit switches
This is a perfectly good solution and is safe unless the machine looses steps, but if that is happening then you have bigger problems that must be solved first

My Cyclone lathe has both home and limit switches fitted so I wires the limit switches into the EStop circuit and again set up soft limits. To date it as never triggered a limit exceeded switch (and hopefully never will)
I manually (with the stepper disabled) wound the x and z just past the soft limits onto the real limit switches to test out the circuit and indeed the EStop circuit is enacted and stops the machine. I then realised that I needed an emergency override switch mounted in the control cabinet to allow the axis to be jogged clear of the limit switches.
Having a rather limit number of input pins this was the best I could do with limit switches but does work well

Paul


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