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Open Builds Black Box Limit switches

Discussion in 'CNC Mills/Routers' started by contacto75, Jan 3, 2022.

  1. contacto75

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    Hello,
    I´m trying to connect my limit switches to my new black box and the pboblem I´m having is:
    The switches stop 2 times, when it touches and when it releases, can anyone help?
     

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  2. Christian James

    Christian James Journeyman
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    Do you mean that when the carriage hits the switch, it pulls back from the switch, then contacts the switch again? If so, that's what it's supposed to do to correctly home.
     
  3. contacto75

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    No, it stops as soon as it touches and it only moves if I click unlock alarm, then, when it releases the switch , it stops again
     
  4. Alex Chambers

    Alex Chambers Master
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    Increasing your pull off distance might solve this issue. What is your $27 value? If it's less than 10 try setting $27 to 10 and see if that fixes it.
    Alex.
     
  5. contacto75

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    $27 is 5mm
     
  6. contacto75

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    This is my switch, can you help by telling me where do I connect each wire in my black box?
     

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  7. Alex Chambers

    Alex Chambers Master
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    As I said above, set $27=10. If that fixes it you can try reducing it until the problem recurs, then increase it slightly again.
    Alex.
     
  8. contacto75

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    done it but same results, it touches and stops but do not retract nothing
     
  9. contacto75

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    I´m not doing the homing, I´m doing a normal stop to prevent damage
     
  10. contacto75

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    a video of it
     

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  11. Alex Chambers

    Alex Chambers Master
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    You presumably have hard limits enabled, in which case that is normal behaviour - if a limit switch is triggered the blackbox will go into alarm mode - it thinks a limit switch has been hit (crash) and forces you to re-set everything.
    Alex.
     
  12. contacto75

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    ok, understood, but why the two alarms? when touches and when releases?
     
  13. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Order yourself some better switches: Xtension Limit Switch Kit

    Low quality switches "bounce" and those are garbage that also doesn't last.
     
  14. contacto75

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    ok, how do I eneble the home all sequence? There is an error message:
     

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  15. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    According to that screenshot, Homing is already enabled. But your switches did not clear when Grbl tried moving off them.


     
  16. contacto75

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    no axis is touching the switches
     
  17. contacto75

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    These are my settings at the moment
     

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  18. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Set $5 back to 0 please
     
  19. contacto75

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    Problem solved, Thanks everyone for the tips snd tricks!
     

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