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Author Topic: limit switch problem  (Read 8262 times)

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Offline Hood

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Re: limit switch problem
« Reply #20 on: March 26, 2010, 05:05:50 PM »
Then I would say hardware is more likely to be at fault. Change the active state of your E-Stop and remove your port cable and test with a voltmeter directly on the parallel port pins.
Hood
Re: limit switch problem
« Reply #21 on: March 27, 2010, 09:12:12 AM »
Thanks Hood. I have located a faulty 25 cond. ribbon cable inside my control enclosure as the cause of the latest problem. Now that I have fixed that, I can get back to solving the previous problem.
Regards,
Charlie

Offline Hood

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Re: limit switch problem
« Reply #22 on: March 27, 2010, 12:25:37 PM »
Thats good to hear Charlie. I still think your limit problem is hardware related as well as I think you said you get the Home LED occasionally flashing. If you can try like I suggested and connect a wire directly to your bob in place of the limit switches and see if the problem is still there even when you enable limits.

Hood
Re: limit switch problem
« Reply #23 on: April 01, 2010, 08:31:20 AM »
Hood:
I have finally located the source of the "noise" that was triggering my "reset" button, however the answer needs an explanation! I have all my limit switch (shielded) cables grounded on the limit switch end only. When I remove the ground wire, everything works normally with no triggering of the "reset" button. This is just the opposite of what you would expect. I have tested this both ways over an 8 hour period and feel confident that this was the problem. Any thoughts?
Charlie

Offline Hood

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Re: limit switch problem
« Reply #24 on: April 01, 2010, 12:05:28 PM »
Sounds like your ground point may not be a ground?
Re: limit switch problem
« Reply #25 on: April 01, 2010, 12:37:46 PM »
Logical conclusion! I will look into that. Thanks.