Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Dallassignco on November 25, 2013, 04:53:47 PM
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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
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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
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Sorry, I wasn't clear, "home switches" on X, Y, Z, A, are occupying those pins. Can those pins be shared? Thanks
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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
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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,
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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.
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I'd probably get one of these. http://www.cnc4pc.com/Store/osc/product_info.php?cPath=33&products_id=482
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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