I am running Mach3 R3.042.040. I have switches on X, Y and Z for homing. I am using parallel port pin 11 for X home, pin 12 for Y home and pin 13 for Z home.
When I hit the "Home" key Z goes up until the Z home switch goes from high to low and stops. Then Y goes to the Y home switch. When the Y switch goes low Y reverses until the Y switch goes high and stops. Then X goes to the X home switch. When the X switch goes low X reverses until the X switch goes high and stops.
What is causing the Z to just stop on the Z home switch and not back off?

Do the machine zero coords for the Z zero?
Hood

do you have anything else set on pin 13

Once you have checked out the two suggestions above then try a hefty debounce interval.

Greg

Z coords do set to zero. I want to use the same switch for Z++ limit and that is set to 13 but it is not active as yet.
I will try the de-bounce.

A de-bounce of 200 fixed the problem. Now I have both homing and limits on the same switch. I think I will also set soft limits.
Thank you