Help with RAMPS and dual endstops

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This topic contains 7 replies, has 3 voices, and was last updated by  Hiro 4 weeks, 1 day ago.

Viewing 8 posts - 1 through 8 (of 8 total)
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  • #89796

    Hiro
    Participant

    I was cabling dual endstops to a ramps board using and while wiring what I thought it was the S with the – of the D15 and I had some smoke coming from my card. I have a spare one, and no complains since it is my responsibility know what I do.

    What I think that happen is that I accidentally connected the – and + to the switch terminals closing them (not good) now the board seems to work getting the power from the USB, but not from the 12v input. I guess I have fried the shield 🙁

    The point is what can I do not to break again other card?  the correct way is to connect the NC Normally Closed wired between s and – in the ends D3, D2, D14, D15, D18, D19?

    #89799

    Barry
    Participant

    Yea, you want them hooked to signal and -.  I’m not exactly sure which pins you need, but I think you have the right idea.  Also, if you’re handy with a soldering iron, pretty sure all you killed was the regulator on the arduino board. It’s pretty easy to tell, the hole that the magic smoke comes out of is usually on the top and fairly visible.  Here’s a few I’ve killed as an example.

     

    #89857

    Bill
    Participant

    And Ryan sells the regulators if you have even minimal SMD soldering tools.

    • This reply was modified 1 month ago by  Bill.
    #89867

    Barry
    Participant

    And Ryan sells the regulators if you have even minimal SMD soldering tools.

    Hey Bill, I linked to the store!   😉

    #89868

    Bill
    Participant

    Yeah, but you did it subtly, instead of IN YOUR FACE like I did. 🙂

    1 user thanked author for this post.
    #89874

    Hiro
    Participant

    Yes… it makes perfect sense to be just the regulator, since the card works fine while powered jus from USB (5V), the problem comes when I hook up to 12v

    I’ve been playing along with the spare board, and found that using the end switches I used, it only seems to work when the three wires are connected, not just S and – as is stated in https://www.v1engineering.com/auto-square-dual-endstops/ (tested with M119 command) I also tried with S and + and just the 3 wires seem to work. May be because of the board circuitry?

    #89886

    Bill
    Participant

    Those board have an LED on them that requires power to work. I would have expected them to use just mechanical switching for the NO and NC parts, but perhaps they do some sort of pull up / pull down with those little resistors and the capacitor, which would force you to provide power. Most people don’t get the fancy ones like yours, they just buy the switch itself.

    #89961

    Hiro
    Participant

    Yes, I just used them since I had those laying around my basement from another project.

    Anyway I’m very sure that the shorcut was I wrongly connected the cable since I have very few light. And I was close to did it again, but fortunately I decided to check this with my cellphone torch before powering the board.

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