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Author Topic: Loss Of Limit Functionality  (Read 2863 times)

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Loss Of Limit Functionality
« on: January 06, 2012, 01:55:46 PM »
I have a DIY CNC Plasma machine that I am setting up, I am using a Gecko G540 controller with X,Y and Z axis. I have limit switches on the X,Y and Z for a while it was working fine. I had set them up as a home reference and I could hit the reference button and the machine would work fine, going to each limit switch and back-off. Well the probem started when I tried referencing again and the Z axis would not move. I assumed I had crashed my switch so I started checking it out but it works fine, even tried a different switch.

I open the controller to check my connections and all was fine. Has anyone had this problem before? Any suggestions?

Offline Hood

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Re: Loss Of Limit Functionality
« Reply #1 on: January 06, 2012, 03:21:43 PM »
Are your limits showing on the diagnostics page? If you press them manually do the LEDs light up?
Hood
Re: Loss Of Limit Functionality
« Reply #2 on: January 06, 2012, 03:51:51 PM »
They are and they used to light up, the z doesn't any more.

Offline Hood

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Re: Loss Of Limit Functionality
« Reply #3 on: January 06, 2012, 04:00:39 PM »
If you attach your xml I can look at the config but it does sound like there is a hardware issue.
Do you know if the switches are normally closed or normally open type?
Hood
Re: Loss Of Limit Functionality
« Reply #4 on: January 06, 2012, 08:25:53 PM »
Hood I will attach the file when I get home. They are normally open switches. I appreciate your time and help, I have seen you are quite prolific on here with the help.
Re: Loss Of Limit Functionality
« Reply #5 on: January 06, 2012, 10:28:10 PM »
Here is my xml file.

Offline Hood

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Re: Loss Of Limit Functionality
« Reply #6 on: January 07, 2012, 04:36:28 AM »
Xml looks ok, except maybe the A axis Home switch is set the same as the Z, I am not sure if that is correct or not as I dont really know what your hardware setup is like.
Hood
Re: Loss Of Limit Functionality
« Reply #7 on: January 11, 2012, 08:01:53 PM »
Hood, I found the problem. I was using a DB25 printer cable not a straight through cable. All is well now. On to the next challenge! Thanks for the help.