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Author Topic: I Need one more pin in Mach3 for zero touch plate - how?  (Read 2924 times)

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I Need one more pin in Mach3 for zero touch plate - how?
« on: November 25, 2013, 04:53:47 PM »
 Hi; I am attempting to get my zero touch plate going. I do have a 5V on my BOB available, but no input pins available in my ports/pins mach3. I have X Y Z and A (which is a separate stepper on 'Y' axis) Then with the last Input pin used by the E-stop; five allowable, right? Is there any way to open a pin with no added BOB? I've searched and searched for this answer. Seems someone would ask the same question. Maybe I'm not using the right key words..! Thanks
Re: I Need one more pin in Mach3 for zero touch plate - how?
« Reply #1 on: November 25, 2013, 05:13:17 PM »
Input pins on Port 1 are: 10, 11, 12, 13, and 15.  Any of these that are unused will work for a touch plate input.   The pins used for X,Y,Z, and A are all outputs.

John Champlain 
Re: I Need one more pin in Mach3 for zero touch plate - how?
« Reply #2 on: November 25, 2013, 05:19:45 PM »
Sorry, I wasn't clear, "home switches" on X, Y, Z, A, are occupying those pins. Can those pins be shared? Thanks
Re: I Need one more pin in Mach3 for zero touch plate - how?
« Reply #3 on: November 25, 2013, 05:23:22 PM »
Many of Mach3 users use only 1 pin for home and limits, leaving the other pins free for other inputs.  You also have the option of adding a 2nd parallel port.
John Champlain

Offline ger21

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Re: I Need one more pin in Mach3 for zero touch plate - how?
« Reply #4 on: November 25, 2013, 05:32:32 PM »
I'd share the Z home switch with another home switch, then you 'd just home Z first followed by the rest. That frees up the one pin you need,
Gerry

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Re: I Need one more pin in Mach3 for zero touch plate - how?
« Reply #5 on: November 25, 2013, 05:34:54 PM »
I failed to mention I use a ESS smoothstepper. But if it works to share pins in Mach, I guess that will make no difference. Thanks, I'll give that a try. Thanks to all.

Offline ger21

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Gerry

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http://www.thecncwoodworker.com/2010.html

JointCAM Dovetail and Box Joint software
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Re: I Need one more pin in Mach3 for zero touch plate - how?
« Reply #7 on: November 25, 2013, 06:53:11 PM »
Ger21, you do know, there are those that get confused with more than three wires coming out of a machine? I really admire these guys, even when their machines look like Frankenstein's monster, they still make sense of it. But I will take your advice if Ports/Pins drive me to drink. Thanks