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Grbl 1.1f limit switch question

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

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  1. Rob Atha

    Rob Atha New
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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
     
    #1 Rob Atha, Nov 6, 2018
  2. DarkPenguin

    DarkPenguin Well-Known
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    NC, I believe. That way if a wire gets pulled or breaks it will trip.
     
    #2 DarkPenguin, Nov 6, 2018
  3. CNCMD

    CNCMD Journeyman
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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.
     
    #3 CNCMD, Nov 8, 2018
    David the swarfer and MaryD like this.
  4. Rob Atha

    Rob Atha New
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    Thanks very much for you advice all
     
    #4 Rob Atha, Nov 8, 2018
  5. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    The GRBL wiki has a lot of info...
    gnea/grbl
     
    #5 David the swarfer, Nov 9, 2018

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