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Limit Switches

Discussion in 'CNC Mills/Routers' started by leversole, Dec 14, 2015.

  1. leversole

    leversole Journeyman
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    When I post my build, I will concentrate on the things I changed...no need to bore people wiht the same things! Anyway, lost my controller (another on the way) and during the down time I took my linmit swtiches off and soldered the leads...the slip on clips sometimes slip off, when they do, you can save a crash only if you can get to the power cord first! HaHa! Anyway, I found a cool out of the way place for the Z limit switch, only bad thing is you have to tear down the machine to get to it (which is why it is now soldered)!

    IMG_2779.JPG IMG_2778.JPG
     
  2. David the swarfer

    David the swarfer OpenBuilds Team
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    you should wire your limit switches to the 'normally closed' terminal. that way if a wire comes off the machine stops.
     
  3. JustinTime

    JustinTime Master
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    It doesn't look like he has that option, swarfer. All he has are two terminals. Looks like the third one, the nc one, missing.

    Also, in the picture it looks like the lower solder joint is a cold joint and not a hot one like the top joint.
     
  4. leversole

    leversole Journeyman
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    Switches are NC only...joint is good, dropped a cold blob on at the last minute!
     
  5. snokid

    snokid Veteran
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    if they are NC then if a wire falls off the machine should stop when that happens.....
    Wire off = open contact.
     
  6. leversole

    leversole Journeyman
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    The machine will only stop if the switches are set for Homing + Limits...If set for homing only, loose wire does nothing, until you try to home the machine and it it crashes
     

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