Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: gumball on May 10, 2012, 03:34:46 PM
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I wanted to set X axis home switch's. I use two motors on the X axis "X" and "A".
My breakout board uses pin 12 for X home. When I hit Ref home the X motor homes, back off, and slowly comes back and trips the X home but the A motor keeps going.
OK, so I think, I'll just put a home switch on the "A" side of the X axis and wire it into the breakout board.
OPPS There isn't an empty pin for "A" home switch. This is how the break out board is wired.
Limits Y home X home Z home E-stop
P 10 P 11 P 12 P 13 P 15
So now what do I do???? After spending some bucks on nice roller switches and hours making ramps to trigger them and more hours drilling a tapping I'd really like to make this work...
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Your BOB provides 5 inputs. How they're labelled is irrelevant. As long as you set Mach up to match you could (if you wanted) use P10 for E-stop P11 for Zhome P12 for Limits etc. etc. whatever you want - your BOB neither knows nor cares.
Ian
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I understand the ability to assign any of the five pins to any function, but I still don't have a way to assign a pin to "A" home without loosing something . The way it runs now I can not Ref All Home, if I do the "X" axis and "A" motors head for home, the "X" trips home, stops, backs-up and slowly trips home again, the "A" motor keeps on going...and going.....till I hit the E-Stop
What do you do if you have a true 4 axis machine???? With 25 pins there must be some more usable pins, (I hope).....
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disable the a home and run the two motors off the x axis
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run all the home switches on one input by connecting them in series
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forget limits and use soft limits
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If you have a slaved axis and want to use a switch to square you should be able to get away with 2 inputs. If all switches on master axis are also used as limit/homes and connected in series, as has been mentioned, that will be 1 input, the slaved axis will have its own home switch and thus you only need 2 inputs.
Hood