many people have been questioning the effects of the EMI given off by the Makerbot: well, here’s your answer, keey touchscreen computers AWAY from the Makerb…
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7 replies
  1. Z LeHericy
    Z LeHericy says:

    @phookyagain I tried doing the experiment again, with the heaters off, and
    the problem still happened, However, I found that the problem would
    completely dissapear if my other hand was in contact with a ground on the
    MakerBot (such as the SD card cover)

    Reply
  2. Adam Mayer
    Adam Mayer says:

    @ZInventions Well, so much for that hypothesis. Are you sure the ground
    you’re plugging into is good? (Are your touchscreen and bot on the same
    ground?)

    Reply
  3. mike mackenzie-grieve
    mike mackenzie-grieve says:

    i was wondering about this issue my self, i do hope to build a nice metal
    case for all my electronics when i am all done, but i do wonder where it is
    mostly emitted from, i would think the stepper controlers my self that is
    where most of your high power fast switching is going on.

    Reply
  4. Z LeHericy
    Z LeHericy says:

    @canuckscottsmen Oddly, the steppers were off when I shot the video, and I
    thought they would be the biggest contributors, However, the EMI
    interference isn’t quite as bad if the heaters are off, so that’s
    definitely part of it, as well as the PSU itself, which I think is the main
    contributor to the EMI. This raises a question, Why doesn’t that affect
    tower computers? is it just the Capacitative screen that is sensitive
    enough?

    Reply
  5. mike mackenzie-grieve
    mike mackenzie-grieve says:

    @ZInventions my next guess would be the atmel processor itself, your idea
    with the metal cage is a good one from what i know its not a bunch you may
    need a finer mesh than what i saw in your video that would be a good way to
    make a faraday cage, but you need to have it grounded. i would also check
    your grounding too on your power outlet

    Reply
  6. mike mackenzie-grieve
    mike mackenzie-grieve says:

    @ZInventions most desktops are in a metal cage, so it would work something
    like a faraday cage not a perfect one but it would cut down on almost all
    noise. i know of a few computers that will make radios get allot of static
    in them when they are close to a computer.

    Reply
  7. Adam Mayer
    Adam Mayer says:

    Thanks for documenting this. The heaters can pump a few amps @ 12V through
    completely unshielded wire. I’d love if you could turn off the heated build
    platform and see if you still get the interference. I’m more suspicious of
    the current HBP design than any other part of the system.

    Reply

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