Miller Electric

Welding Discussion Forums

Home » Resources » Communities » Welding Discussion Forums
 
Miller Welding Discussion Forums - Powered by vBulletin

Results 1 to 3 of 3
  1. #1
    Join Date
    Sep 2011
    Posts
    20

    Default miller thunderbolt noise?

    I have an old miller thunderbolt AC/DC machine. It is considerably more noisy when running on AC than on DC, is this normal?

    thanks

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,909

    Default

    Its just a noisy machine. you can and should grease the internal shunts and center screw though.

  3. #3
    Join Date
    Dec 2006
    Location
    Central Alabama
    Posts
    40

    Default

    I have a 5+ year old Hobart AC/DC. If I remember correctly, the manual says you may need to adjust the shunt screws for too much vibration and noise. I had the opposite problem. My crank was too hard to turn and I loosened each shunt adj. screw about a quarter turn. If your machine has the crank adjustment and it seems real easy to turn, you may need to tighten the shunt screws just a fraction.
    Miller Challenger 172
    Hobart AC/DC Stickmate
    Older Sears AC Stick machine

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Warning: Function split() is deprecated in /mnt/stor3-wc1-dfw1/357822/357839/www.millerwelds.com/web/content/lib/footer.inc.php on line 82

Welding Projects

Special Offers: See the latest Miller deals and promotions.