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Limit switches will work one at a time, but not when wired in paralell

Discussion in 'CNC Mills/Routers' started by Steve French 17, Dec 2, 2021.

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  1. Steve French 17

    Steve French 17 New
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    I wired my limit switches as per the instructions here (so I can have a limit switch at the min and max point of the axis)
    docs:blackbox:connect-xtension-limit [OpenBuilds Documentation]

    And they do not work - however if I disconnect one limit switch then the other one will work. I'm sure I'm doing something incredibly simple wrong, but I can't find out what the problem is - has this happened to anyone else before?
     
    #1 Steve French 17, Dec 2, 2021
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Post detailed pics of your wiring and we'd be happy to check it for you
     
    #2 Peter Van Der Walt, Dec 3, 2021
  3. David the swarfer

    David the swarfer OpenBuilds Team
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    both switches must be wired to the 'NO' Normally Open contacts.
    use the OBControl diagnostics to check switch status, each switch by itself, and then pairs wired together.
     
    #3 David the swarfer, Dec 3, 2021
  4. Steve French 17

    Steve French 17 New
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    Here are the photos -



    upload_2021-12-3_14-25-57.png
    upload_2021-12-3_14-26-17.png
    upload_2021-12-3_14-26-34.png
    upload_2021-12-3_14-26-50.png
    upload_2021-12-3_14-27-7.png
    upload_2021-12-3_14-27-24.png
     
    #4 Steve French 17, Dec 3, 2021
  5. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    #5 Peter Van Der Walt, Dec 3, 2021

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