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help: openbuilds Xtension limit switches

Discussion in 'CNC Mills/Routers' started by jawbrkr, May 16, 2025 at 12:18 PM.

  1. jawbrkr

    jawbrkr New
    Builder

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    I've been facing this problem for a long time. I used to run my "Frankenmitsu" (a Sainsmart Genmitsu frame with an open-build controller). I finally upgraded the frame and got an open-builds lead 1515 kit, and I've finally set it up.

    It was working with a single switch, and the soft and hard limits were enabled in the firmware. Then, I added two additional limit switches for X and Y. I soldered the connections together. They're in parallel per the documentation. The firmware tells me they've been triggered, and I can't reset them. The machine does work when I disable hard limit switches in the firmware. It's inoperable with hard limits enabled. Here's a short video showing what I'm seeing.

    https://photos.app.goo.gl/EJgdGTYs8oV2CxNo8

    I've tried many of the suggestions on the EMI page, but because it was working with a single limit switch, I suspect something else is the problem. I know that I can use the machine, but I'd like to use it with hard limits enabled. I appreciate any help you guys can provide.

    Cheers,
    Dan

    x32 config: x32 - Pastebin.com
     
    #1 jawbrkr, May 16, 2025 at 12:18 PM
    Last edited: May 16, 2025 at 12:23 PM
  2. Peter Van Der Walt

    Peter Van Der Walt OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Pictures of the switch wiring, perhaps wired NC vs NO? (Take clear closeups so we can see C, NC, NO labelling on switches or help ID them)
    We use parallel for Normally Open (NO) switches, and Series for Normally Closed (NC) wiring
    Also, make sure $5 is set correctly (What is it set to, and then we'll see if that corresponds to how the switches are wired)
     
  3. jawbrkr

    jawbrkr New
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