Newbie needs help with Miller Roughneck 2E.
RSS | Subscribe | Contact Us | Advertise | About Us
Results 1 to 11 of 11
  1. #1
    Join Date
    Jul 2019
    Location
    Austin, Texas
    Posts
    7

    Newbie needs help with Miller Roughneck 2E.

    Serial # JF852939

    So, I bought this thing with the understanding that it didn't make juice, and that turned out to be true.

    I replaced the rectifier bridge, and got a 1000 microfarad 75 VDC capacitor installed.

    No juice.

    Now, if it were wooden I could make it work, and that's a fact, but it's electronical, so I'm in uncharted territory.

    I did dig up a digital multimeter, and the outlets on the face are showing 1 or 2 VAC.

    The welding lugs show the same.

    I may not be using the meter correctly, either, but I sure would like to get this machine up and going.

    Any ideas?

    THANKS!

  2. #2
    Join Date
    Jul 2012
    Posts
    685

    Re: Newbie needs help with Miller Roughneck 2E.

    https://www.millerwelds.com/files/ow...s/O420H_MIL.pd

    Print a copy of ownwers manual and follow troubleshooting guide.

    Parts section lists specs for bridge rectifer(30 amp 600v) and cap (240 microfarad 200vdc).
    Last edited by guajilloweld03; 08-08-2019 at 03:51 PM.

  3. #3
    Join Date
    Jul 2019
    Location
    Austin, Texas
    Posts
    7

    Re: Newbie needs help with Miller Roughneck 2E.

    Quote Originally Posted by guajilloweld03 View Post
    https://www.millerwelds.com/files/ow...s/O420H_MIL.pd

    Print a copy of ownwers manual and follow troubleshooting guide.

    Parts section lists specs for bridge rectifer(30 amp 600v) and cap (240 microfarad 200vdc).
    Thanks.

    That's a bad link, but I'll find it.

  4. #4
    Join Date
    Jul 2012
    Posts
    685

    Re: Newbie needs help with Miller Roughneck 2E.


  5. #5
    Join Date
    Jul 2019
    Location
    Austin, Texas
    Posts
    7

    Re: Newbie needs help with Miller Roughneck 2E.

    Yep. The troubleshooting schedule is all complete, but no juice.

    Thanks for the heads up on the capacitor. I think I got that mixed up with the part number off the Bobcat.

    I replaced the rectifier, as I said before, but I checked the used one after the fact, and it seems OK.

    It will likely be a week before I get the right capacitor in hand.

    I'll give an update after it is installed.

    Thanks!

    John

  6. #6
    Join Date
    Jul 2012
    Posts
    685

    Re: Newbie needs help with Miller Roughneck 2E.

    Test both cap and bridge rectifier before installing them. One time tested the bridge rectifier and it was bad, but did not check cap and it was bad. Then only replaced the bridge rectifier and the bad cap killed the bridge rectifier.

  7. #7
    Join Date
    Jul 2012
    Posts
    685

    Re: Newbie needs help with Miller Roughneck 2E.

    Those parts are less $$$ from Allied Electronics and Mouser or a similar type Electronics store.

  8. #8
    Join Date
    Mar 2015
    Location
    Milwaukee, WI
    Posts
    296

    Re: Newbie needs help with Miller Roughneck 2E.

    Did you check that you're getting good contact between the carbon brushes and the rings? Also you should be able to read voltage between the wires feeding the brushes so that the rotor can produce a magnetic field.
    Last edited by Denis G; 08-10-2019 at 12:19 AM.

  9. #9
    Join Date
    Feb 2017
    Posts
    10

    Re: Newbie needs help with Miller Roughneck 2E.

    Check the wire running to the condenser on the machine. That turned out to be the issue on my unit when I got it.

    Sent from my Nexus 6P using Tapatalk
    Hobart betamig 1800
    Hobart handler 135
    Marquette (Miller) Roughneck 1E
    Century 295 AC/DC Arc welder/scratch start TIG rig
    The key to welding is to go slow and wing it.

  10. #10
    Join Date
    Jul 2019
    Location
    Austin, Texas
    Posts
    7

    Re: Newbie needs help with Miller Roughneck 2E.

    Thanks, fellas!

    I'm thinking the correct capacitor should be in hand by Wednesday, and I'll put all these suggestions into practice at that time.

    Since I bought that machine, I have looked at many more. The face is in excellent shape, and even the paint is good.

    I figure it's seen little use, so I'm hoping this mystery doesn't go too many more chapters, and I end up with a durable machine.

    I'l let y'all know how it goes, and thanks again!

  11. #11
    Join Date
    Feb 2019
    Posts
    11

    Re: Newbie needs help with Miller Roughneck 2E.

    Also check the fine adjustment control.Mine had a open winding in it and one of the two micro switches was bad.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
RSS | Home | Penton Media | Contact Us | Subscribe | For Advertisers | Terms of Use | Privacy Statement