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Limit Switch Woes

Discussion in 'OpenBuilds Forum Help' started by sandhills, Oct 10, 2022.

  1. sandhills

    sandhills New
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    I am changing over my old OX CNC to the Black Box Motion Controller. The install was a breeze but when I opened CONTROL to set my parameters it shows my Y axis limit switch as triggered... which it was not. The other two axis are operating normally. After some troubleshooting it seems that the signal pin on the BlackBox for the Y axis limit is passing through the 5VDC as well? This isn't some hidden setting I am unaware of is it?
     
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    No, but it has a Pull-up to prevent noise. That's maybe what you are noticing there.

    Be sure to wire your switches as shown in docs:blackbox:start [OpenBuilds Documentation] > Section 3.4.x
     
  3. sandhills

    sandhills New
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    I see... Well I pulled all the V+ out of the switch plugs but I guess the damage is done! My Y Axis limit still reads Triggered. My meter still reads 5v but drops quickly to below a volt. Can anything be done or did I just receive a costly lesson in RTFM?!
     
  4. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Can you explains what exactly was miswired?
    Which version of BlackBox you have? (can peek into the vents on the back side (opposide side of where the power switch is) - V2.xx - if its recent purchase probably a V2.9 or V2.10)
    Also:
    - What is your $5 Limits Invert setting in Grbl settings currently? (or a Grbl settings backup please)
    - With all the limits unplugged - what does the Troubleshooting tab display (screenshot please)
     
  5. sandhills

    sandhills New
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    Well, I am unsure if anything was "miswired" When I installed everything the only thing I had to re wire was Y2 Motor to change direction. My version is V2.6. Capture001.PNG
     

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  6. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    I was referring to this:
    What kind of switches do you have? Assuming its not the Xtension Limits then? Micro Limits? Was NC wired to V+ at any point? (With C to GND and NO to SIG?) or how was it wired, prior to you 'pulling all the V+' out?
     
  7. sandhills

    sandhills New
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    Oh, I see. The switches are some Makerbot microlimits. I can't say with 100% certainty that it never was wired as you said as my 2 son's were helping me at the time but I don't believe so. The switches were wired with the grd to grd, V+ to V+ and sig to sig. Like I said the other two are working perfectly. Oh and thank you so much for taking to time to help me with this!
     
    #7 sandhills, Oct 10, 2022
    Last edited: Oct 10, 2022
  8. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
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    Thanks for confirming. Please contact the store via Support > New Ticket for further assistance - please include a link to this thread so they can see the Troubleshooting already performed
     

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