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  1. #1
    Engineer
    Join Date
    Dec 2014
    Location
    Canada
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    498

    Noise / EMF Shielding Coil for Steppers

    I see in this photos they are wrapping the stepper wires around a coil
    I assume to prevent any jitter or interference

    Do you guys know what this is called?12-open-electronics-enclosure.jpg

  2. #2
    Staff Engineer printbus's Avatar
    Join Date
    May 2014
    Location
    Highlands Ranch, Colorado USA
    Posts
    1,437
    Add printbus on Thingiverse
    I'm not sure what you're asking. What are the coil things called? Those are toroid cores. They're likely added as part of getting emissions for a commercial product reduced to the level needed for something like FCC Part 15 compliance or UL listing.

  3. #3
    Senior Engineer
    Join Date
    Jun 2014
    Location
    Burnley, UK
    Posts
    1,662
    It is an EMI ferrite core.

  4. #4
    Engineer
    Join Date
    Jul 2014
    Location
    Eastern Colorado
    Posts
    536
    You can get large ones like that to wrap the wires around, or you can get smaller ones that clamp around the wires.

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