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Grbl 1.1f limit switch question

Discussion in 'General Electronics' started by Rob Atha, Nov 6, 2018.

  1. Rob Atha

    Rob Atha Well-Known
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    Hi all

    I’m after a bit of advice regarding limit switches, I’ve previously experimented with this on the Arduino Uno but gave up but now want to get back to it.


    I still have the pull up resistors in place so all is good there, but I’m trying to find out the easiest way to implement the limit switches and should I use N/O or N/C loops

    Any advice here would be very greatful

    Thanks
     
  2. DarkPenguin

    DarkPenguin Journeyman
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    NC, I believe. That way if a wire gets pulled or breaks it will trip.
     
  3. CNCMD

    CNCMD Veteran
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    It's really your decision on the matter.

    NO = In the event that you have a wire/connection go bad the system will not trip, however, the next time you home, the broken axis will run wild and crash the cnc.

    NC = In the event that you have a wire/connection go bad the system will trip and the job will stop whether you wanted that or not.
     
    David the swarfer and MaryD like this.
  4. Rob Atha

    Rob Atha Well-Known
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    Thanks very much for you advice all
     
  5. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder

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    The GRBL wiki has a lot of info...
    gnea/grbl
     

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