Welcome to Our Community

Some features disabled for guests. Register Today.

Confused about Hard limit and pull-off

Discussion in 'CNC Mills/Routers' started by DaveStewart, Aug 26, 2017.

  1. DaveStewart

    DaveStewart Well-Known
    Builder

    Joined:
    Jul 20, 2017
    Messages:
    3
    Likes Received:
    7
    Hey folks.
    First off, sorry for posting this in the wrong area, should have been in Electronics, but I can't change this.

    I have Homing and limit switches installed and Home sequence works, including 5mm pull-off.
    Now, when I test the Limits (jog until I hit one), it does as expected:
    ALARM:1 (Hard limit)
    [MSG:Reset to continue]

    The issue I have is no pull-off happening on Limit and thus cannot reset because switch is still tripped.
    Even when I back off manually to reset switch, I cannot unlock.
    Is this normal, why does pull-off not initiate for Limit?

    Thanks in advance.
    grbl-Mega 1.1 running on Arduino Mega and cnc.js running on raspberry pi.

    Here are my relevant grbl settings:
    $20=0 (Soft limits enable, boolean)
    $21=1 (Hard limits enable, boolean)
    $22=1 (Homing cycle enable, boolean)
    $26=250 (Homing switch debounce delay, milliseconds)
    $27=5.000 (Homing switch pull-off distance, millimeters)
     

Share This Page

  • About Us

    The OpenBuilds Team is dedicated helping you to Dream it - Build it - Share it! Collaborate on our forums and be sure to visit the Part Store for all your Maker needs.


    [email protected]

  • Like us on Facebook

  • Support Open Source FairShare Program!

    OpenBuilds FairShare Give Back Program provides resources to Open Source projects, developers and schools around the world. Invest in your future by helping others develop their future.

    Donate to Open Source