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IndustryArena Forum > OpenSource CNC Design Center > Arduino > GRBL 1.1 ARDUINO uno pinouts
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  1. #1
    Join Date
    Mar 2011
    Posts
    333

    GRBL 1.1 ARDUINO uno pinouts

    with regards to limit switch pinouts I have seen some places noting pin 9,10 and 11 for X,Y and Z limit switches
    https://blog.protoneer.co.nz/grbl-ar...or-pin-layout/
    and some articles stating pins 9,10 and 12.
    https://github.com/gnea/grbl/wiki/Se...e-Homing-Cycle
    What is right???

  2. #2
    Join Date
    Jan 2005
    Posts
    1943

    Re: GRBL 1.1 ARDUINO uno pinouts

    Depends which version of Grbl you are using. Pin 11 is used for PWM, so the Z axis swapped from pin 11 to pin 12 when PWM support was added.

  3. #3
    Join Date
    Mar 2015
    Posts
    409

    Re: GRBL 1.1 ARDUINO uno pinouts

    On the arduino uno R3 and GRBL version 1.1f the pins are 9,10 and 12 as stated in the GRBL Wiki.

    If you use a different GRBL version, you have to follow the documentation for that version.

    If I remember correct, the 9,10,11 pinout was for an older GRBL version. The protoneer link is dated 2013/01/30!

  4. #4
    Join Date
    Mar 2011
    Posts
    333

    Re: GRBL 1.1 ARDUINO uno pinouts

    yes I am using 1.1 so I will use 9,10 and 12.
    Thanks

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