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Question Emergency stop E-stop button inverted

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by Tino.Sturlic, Apr 18, 2022.

  1. Tino.Sturlic

    Tino.Sturlic Member Gold Contributor

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    Hello all.

    I finally got to installing emergency button to my AMC-MDBOX controller but it works inverted. Probably should have bought normally open switch. Is there any way to invert this?
    Last edited: Apr 19, 2022
    Tino.Sturlic, Apr 18, 2022
    #1
  2. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    What kind of switch you used? Most mushroom type estop switches have both NC and NO contacts...

    mxuteuk 22mm 110/120V LED Light Red Mushroom Emergency Stop Push Button Switch Illuminated Shut Off Estop Button 1 NC 1 NO 440V 10A, LAY37-11ZSD www.amazon.com/dp/B07RYQM6RS/ref=cm_sw_r_apan_i_4D48M0BD70D1604TC0ZQ?_encoding=UTF8&psc=1
    Thanos, Apr 19, 2022
    #2
  3. Tino.Sturlic

    Tino.Sturlic Member Gold Contributor

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    https://www.ebay.com/itm/165412341074?hash=item2683580552:g:1F0AAOSw-wFZbK5o
    This is the one i bought. It came with only one switch.

    I got around the problem and modified the switch to work normally but now when the circuit is open (E-stop not engaged) the interface is not sure of its state, and is constantly detecting as a switch being pressed. It is constantly going from stand by to park mode. When I press the switch its OK and detects E-stop engaged. Do I need to install pull down or pull up resistor?

    Best regards.
    Last edited: Apr 19, 2022
    Tino.Sturlic, Apr 19, 2022
    #3
  4. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

    Joined:
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    1,347
    Occupation:
    Electronics Engineer
    Location:
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    Balance:
    2,699Coins
    Ratings:
    +1,043 / 9 / -0
    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    The signal is already internally pull-up to 100k. But I believe you may have EMI interference because of the servos. I'd suggest using shielded audio cable for the switch, with shield connected to ground on the AMC controller, to avoid the cable act like an antenna...
    • Informative Informative x 1
    Thanos, Apr 19, 2022
    #4