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G400 question

Discussion in 'GRIZZLY INDUSTRIAL INC.' started by Martin22250, Jan 19, 2017.

  1. Martin22250

    Martin22250 United States Iron Registered Member

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    I have a less than one year old g4003g, it sounds like the motor has a rattle noise that don't change with spindle speed, same noise wether full speed or 70 rpm. Check motor mounts and belt tension, and the thin motor cover for the power wire is tight also, works fine just has me curious. Also my machine has a light hum even when the red power button is pushed in, I just keep the breaker off when not using it to be safe.
    Don't know how to fix my title heading I left out part of my model letters
     
    Last edited: Jan 19, 2017
  2. tmarks11

    tmarks11 Active User Active Member

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    The hum is due to the control power transformer, which is always on. It takes 220V and produces 110V (for control power to the switches) and 24V (for the halogen light).

    Doesn't really hurt anything to leave it power, but it is annoying. Would be nice if the e-stop switch had a spare contact set that would switch it off.

    rattle noise independent of spindle speed sounds like sheet metal vibrating. Check your back splash screws?
     
  3. Martin22250

    Martin22250 United States Iron Registered Member

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    Thanks for your reply, I'll check it out
     
  4. Bob Korves

    Bob Korves H-M Supporter - Premium Content H-M Supporter-Premium

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    Might be a loose fan in the motor. Watch the belts run on the motor pulley and see if there is a problem with the belts jumping around or the pulley being loose.
     

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