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Author Topic: When Homing, Z does not back off switch  (Read 2470 times)

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When Homing, Z does not back off switch
« on: October 23, 2010, 06:43:38 PM »
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?

Offline Hood

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Re: When Homing, Z does not back off switch
« Reply #1 on: October 23, 2010, 06:59:42 PM »
Do the machine zero coords for the Z zero?
Hood
Re: When Homing, Z does not back off switch
« Reply #2 on: October 23, 2010, 08:11:56 PM »
do you have anything else set on pin 13

Offline Greolt

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Re: When Homing, Z does not back off switch
« Reply #3 on: October 23, 2010, 08:22:27 PM »
Once you have checked out the two suggestions above then try a hefty debounce interval.

Greg
Re: When Homing, Z does not back off switch
« Reply #4 on: October 23, 2010, 09:49:44 PM »
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.
Re: When Homing, Z does not back off switch
« Reply #5 on: October 23, 2010, 10:28:48 PM »
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