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Thread: static causing communication problems...again

  1. #31
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    Jun 2017
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    Quote Originally Posted by Ken Sully View Post
    Just a final thought. How old is your DC? Could you have a motor failing causing electrical noise in the ground leg? Seems odd the only time you have trouble is when its turned on.
    The DC is an Oneida Gorilla Pro that’s less than one year old. Seems to work perfectly.

  2. #32
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    Jun 2013
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    Get somebody with a battery operated (to avoid just another ground issue) oscilloscope to probe the various sections of your wiring in a systematic fashion. Once you "see" the noise (including frequencies and amplitudes) you have a handle to test changes immediately. Otherwise you may just continue the hit-and-miss experimentation. There must be something unique about your setup so that the standard recipes don't work. Right now you don't even know if this is high frequency noise (like from VFDs), if it is radiated or conducted, or if this is just AC leakage.

  3. #33
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    I rigged up a long wire lead to one of the probes of the multimeter and checked continuity, which exists from the bare copper wire at the dust show all the way to the ground bus on the electrical panel. I don’t know enough to determine whether the continuity is “good” or however you’d measure it, but the multimeter beeps. Sometimes it’s a bit of a staccato beep. But it beeps.

    Also grounded the frame.

    Any ideas?

  4. #34
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    May 2014
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    MA
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    Try it with the grounded frame and report back!

  5. #35
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    Quote Originally Posted by EricSchimel View Post
    Try it with the grounded frame and report back!
    Grounding the frame didn’t stop the problem.

  6. #36
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    Jan 2004
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    iBILD Solutions - Southern NJ
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    Quote Originally Posted by bking1836 View Post
    Grounding the frame didn’t stop the problem.
    How exactly did you ground the frame? Did you put the wire on an exposed bolt or did you drill into the steel & attach a lug/ring terminal etc?
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

  7. #37
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    Quote Originally Posted by Brady Watson View Post
    How exactly did you ground the frame? Did you put the wire on an exposed bolt or did you drill into the steel & attach a lug/ring terminal etc?
    I sanded off paint to bare metal and attached a heavy duty alligator clip to the frame with a bare copper wire running to another heavy duty alligator clip, which is attached to the conduit (also sanded away paint) that runs to the electrical panel.

  8. #38
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    It seems the DC is the culprit. As some have mentioned, it is completely possible for the motor to have a goofy winding in it that causes electrical noise. Static is generally a problem in the dead of winter when the air is really dry. It's probably plenty humid where you are being so close to the lake and with the number of storms that have passed your way recently. Did you have this same issue during mid summer?

    As a means to an end, I think only a professional motor repair guy would have the know how and equipment to find out if the DC motor is wonky or not. The manufacturer probably doesn't have a clue about static other than making sure their electrical and chassis grounds are terminated at a common point.

    The other thing that *may* cure the problem is some kind of line conditioner that will clean up the electrical signal. Electrical noise & conditioners are very common in manufacturing...there can be noise issues with spindles, DCs, pumps, hi-freq welders and plasma cutters...and not to mention your electric service itself can be noisy as well. Without an O'scope you have to play the guessing game.
    High Definition 3D Laser Scanning Services - Advanced ShopBot CNC Training and Consultation - Vectric Custom Video Training IBILD.com

  9. #39
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    Quote Originally Posted by Brady Watson View Post
    It seems the DC is the culprit. As some have mentioned, it is completely possible for the motor to have a goofy winding in it that causes electrical noise. Static is generally a problem in the dead of winter when the air is really dry. It's probably plenty humid where you are being so close to the lake and with the number of storms that have passed your way recently. Did you have this same issue during mid summer?

    As a means to an end, I think only a professional motor repair guy would have the know how and equipment to find out if the DC motor is wonky or not. The manufacturer probably doesn't have a clue about static other than making sure their electrical and chassis grounds are terminated at a common point.

    The other thing that *may* cure the problem is some kind of line conditioner that will clean up the electrical signal. Electrical noise & conditioners are very common in manufacturing...there can be noise issues with spindles, DCs, pumps, hi-freq welders and plasma cutters...and not to mention your electric service itself can be noisy as well. Without an O'scope you have to play the guessing game.
    It's much dryer in Milwaukee than people think. My shop is in the low 30% humidity these days. This only started happening once the humidity dropped.

    An electrician with experience with dust collection in industrial conditions is coming tomorrow.

  10. #40
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    "It's much dryer" how about a hot plate and a pot of water to raise the moisture/humidity inside the shop? Where my shop is located is high mountain desert and when its dry its dry! I wish you well on your quest! Russ
    AKA: Da Train Guy

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