Hello Guest it is September 15, 2019, 02:53:18 PM

Author Topic: Troubleshooting Limits  (Read 16917 times)

0 Members and 1 Guest are viewing this topic.

Offline kolias

*
  •  1,011 1,011
    • View Profile
Troubleshooting Limits
« on: March 07, 2011, 10:39:10 AM »
I’m going step by step to resolve the problem I have with my limit switches

On the diagnostic screen there are four columns of LED’s representing the X, Y, Z, and A axes. I have connected all my limits as before when all was working normal and all limits / home working well and when I trigger manually any limit, the corresponding LED lights up and I get the “limit switch triggered” message.

However no LED lights up under the X column when I trigger the X axis limits although I get the “limit switch triggered” message. When I do that the LED’s light up under the other columns

Even when the CNC is turned OFF I can see on the computer screen all LED’s ON but non under the X axis. Is this normal ????

Also when I trigger the A axis single limit switch, the LED lights up but I get no message “limit switch triggered” neither I have to press the reset button. Is this normal ?????

BTW, A & Y are slaved together
Nicolas

Offline Hood

*
  •  25,849 25,849
  • Carnoustie, Scotland
    • View Profile
Re: Troubleshooting Limits
« Reply #1 on: March 07, 2011, 02:07:41 PM »
Attach your xml please.
Hood

Offline kolias

*
  •  1,011 1,011
    • View Profile
Re: Troubleshooting Limits
« Reply #2 on: March 07, 2011, 02:17:51 PM »
I have verified all limits and home switches and they all working fine

I just like to know if it is normal to have on the diagnostic screen no LED's ON under the X axis

Here is my XML
Nicolas

Offline Hood

*
  •  25,849 25,849
  • Carnoustie, Scotland
    • View Profile
Re: Troubleshooting Limits
« Reply #3 on: March 07, 2011, 02:25:16 PM »
Ok first you dont have A axis limits enabled so you will not get any limits working for the A, you have it set as a Home only, so you will only get the home LED working and because it is a Home Switch only you will not get a limit trip..
And yes as you have the X enabled and set to pin 13 you should see the limits for X (m1+, m1-) lighting when you press them. If they are not then it would seem you dont actually have them connected to pin 13 but another pin.
Hood

Offline kolias

*
  •  1,011 1,011
    • View Profile
Re: Troubleshooting Limits
« Reply #4 on: March 07, 2011, 02:40:38 PM »
Thank you Hood, that provides some light to my puzzle and I will work on that

Would you know why when I press to home the Z axis it did home nicely despite that I dont see any LED's for X on the diagnostic screen?
Nicolas

Offline Hood

*
  •  25,849 25,849
  • Carnoustie, Scotland
    • View Profile
Re: Troubleshooting Limits
« Reply #5 on: March 07, 2011, 02:44:52 PM »
Yes, because you would see a LED for the Z and not the X, you have the Z set as pin 11 and X pin 13 so if you home the Z the switch on pin 11 will be hit and the LED for Z will light.
Hood

Offline kolias

*
  •  1,011 1,011
    • View Profile
Re: Troubleshooting Limits
« Reply #6 on: March 07, 2011, 02:49:57 PM »
Very sorry Hood, I meant the X axis. I can home the X axis nicely and when she goes to the other end (+) she hits the limit and stops

To me it seems that pin 13 is correct but why I dont see the LED on the diagnostic screen I dont understand.
Nicolas

Offline Hood

*
  •  25,849 25,849
  • Carnoustie, Scotland
    • View Profile
Re: Troubleshooting Limits
« Reply #7 on: March 07, 2011, 02:54:41 PM »
Might not be, if you press the X switch do you see any of the other LEDs on the diagnostic screen light up?
Hood

Offline kolias

*
  •  1,011 1,011
    • View Profile
Re: Troubleshooting Limits
« Reply #8 on: March 07, 2011, 02:56:26 PM »
Yes the LED's on the Y, Z and A light up and that is confusing to me
Nicolas

Offline Hood

*
  •  25,849 25,849
  • Carnoustie, Scotland
    • View Profile
Re: Troubleshooting Limits
« Reply #9 on: March 07, 2011, 02:59:27 PM »
That to me would suggest that you have all of your limit switches wired into either pin 10, pin 11 or pin 12 and none on pin 13 :)

Press the A and see what lights
Press the Z and see what lights
Press a the Y and see what lights
Hood