Possible Endstop short/issue

  • Hello all,

    During commissioning of my machine, some wires got snagged on something and yanked out my X-axis endstop while the board was powered on.

    Everything is still working normally except that the X-endstop input no longer registers when the endstop switch is triggered. Is there any way to get that working again or use an input on a Duex5?

  • Given that endstops are actually simple switches, and they just connect the pins together (or not), there is almost nothing that can be done by "plugging" or "unplugging" while powered up that could potentially hurt anything.

    About the only thing would be if those wires were torn open and touched a 5V or 12V wire. That could kill and endstop input, maybe.


    Is it possible that physical damage occurred? Take a magnifier and look really carefully at the pins and at the opposite side of the board and similar. Perhaps even touch a soldering iron to the opposite side (and get a good melt). Of course, consider warranty either way before doing things like that.

  • If you don't use an endstop on e0/e1 (for filament sensing or similar), you could remap that endstop to X. Also make sure the yanking action didn't break the crimp connection or the switch connection.

  • @oliof @Danal
    After doing some more thorough troubleshooting I discovered that the most likely cause is the crimps; I plugged my Y endstop connector in to my X endstop and it triggered perfectly fine.

    Its odd though, the damage must be in how the crimps contact the pins while the connector is plugged in. I verified the electrical continuity of the endstop with a multimeter by making contact with the exposed crimps (still in the connector).

    Oh well, way better outcome than finding out there was actual damage to the board.

  • @Red-Sand-Robot said in Possible Endstop short/issue:

    Oh well, way better outcome than finding out there was actual damage to the board.

    Yay! And good job on finding that. Things like that can be very frustrating/confusing.

  • @Red-Sand-Robot I only had the idea because it happened to me in the past (-:. Basically it's either a weak crimp got loose or the connector lost its grip on the crimp shoe and plugging the plug into the socket moves out the crimp shoe rather than sliding it on the pin. It can be hard to see

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