Sa200
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Thread: Sa200

  1. #1
    Join Date
    Mar 2013
    Posts
    12

    Sa200

    Hey all, I have a question for the pros. I have a mid 70's blackface and a 60's red face that burn 7018 well on a low dial setting but won't burn 6010 properly on low on the rheostat but set above 50 welds smooth and above 70 perfect. If I set the dial to 30 or lower it will weld 6010 rod for about 5 seconds then the arc starts cutting out. But if I drive the rod in it'll weld smooth. Anything that would cause the arc to break when its long arced a bit? OCV is set 91 on one machine and 93 on another.

  2. #2
    Join Date
    Dec 2016
    Posts
    233

    Re: Sa200

    Commutators need cleaned to make a better connection?


    Sent from my iPhone using Tapatalk

  3. #3
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    I cleaned them. I have 38 ohms off the blue and brown wires out of the barrel.

  4. #4
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    I changed the remote switch changed out the rheostat and still the same thing

  5. #5
    Join Date
    Mar 2014
    Posts
    130

    Re: Sa200

    Xxxxxxxxx
    Last edited by AGW; 10-11-2017 at 08:17 PM.

  6. #6
    Join Date
    May 2010
    Location
    Port Orchard, WA.
    Posts
    9,838

    Re: Sa200

    Is it possible your 6010 has dried out? Dip your 6010 in water, and let air dry for 24-hours.
    Don’t pay any attention to me
    I’m just a hobbyist!

    Carl

    Dynasty 300
    V350-Pro w/pulse
    SG Spool gun
    1937 IdealArc-300
    PowerArc 200ST
    3 SA-200s
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  7. #7
    Join Date
    Dec 2013
    Location
    Visalia, CA
    Posts
    1,633

    Re: Sa200

    Quote Originally Posted by Allstar_pipeliner View Post
    Hey all, I have a question for the pros. I have a mid 70's blackface and a 60's red face that burn 7018 well on a low dial setting but won't burn 6010 properly on low on the rheostat but set above 50 welds smooth and above 70 perfect. If I set the dial to 30 or lower it will weld 6010 rod for about 5 seconds then the arc starts cutting out. But if I drive the rod in it'll weld smooth. Anything that would cause the arc to break when its long arced a bit? OCV is set 91 on one machine and 93 on another.
    i could be wrong, but, when you set your rheo that low, you are not only reducing current, but voltage too. from what i gather, 6010 needs some real ocv to be able to run properly, especially to long arc like you said. i have found with my machine that general pipe welding is easiestly done in the correct gear to run between 40 and 70 on the rheo.
    bosses stuff:
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    Kevin

  8. #8
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    Dipped the rods in water same thing new tins same thing tried the rods on another welder at 30 on the rheostat and welded like a dream. I put in new post new leads new stinger and ground new rheostat and burned a couple 3/16 and fell to see if anything was warm or hot and nothing. It's not even a smooth arc at 40 it's got to be 50 and higher.

  9. #9
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    It'll blow a hole through 3/8 plate with 3/16 on 4th and 80 but won't run a smooth bead with 3/32 on 4th and 25

  10. #10
    Join Date
    Nov 2012
    Location
    ROCKVILLE ,,VA
    Posts
    352

    Re: Sa200

    Did you install new brushes? Or old brushes not seated good,,, just woke my machine from long restore sleep it break arc after pulling rod off the pipe about 3/16" so pour water on brushes while running for few seconds ,then put her in hi gear and 100% fine let bark on 1/4" 7024 about (2)rods, re clean commutator with stone , went back to old setting ,can tease her now! Can pull arc off real slow about 1"1/4 she still wants weld! So make sure brushes are seated all way across

  11. #11
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    The brushes had good life yet and moved up and down smoothly but I did roll the rack recently to drop the ocv because it was a bit higher than I like. I welded for awhile after to seat them. Could it be that simple that the brushes need a bit more. I am ready to skip breakfast and run out and give it a try.

  12. #12
    Join Date
    Jun 2015
    Location
    Alaska born, Alaska bred
    Posts
    836

    Re: Sa200

    Every Lincoln welder I've ever run, the arc force was adjusted via the fine current. Low fine current has a smooth arc good for low-hy, and high fine current has an aggressive arc good for cellulose rod.

    Based on my experience, I would venture to say you aren't experiencing anything unusual.
    2000 Lincoln SA-250
    1974 Miller Dial-Arc 250

  13. #13
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    Ok I did a wet seating for the brushes and now I'm getting a spark off the commutator stone on one side of the brushes but not the other. Is it maybe still wet and arcing out? I've never seen sparks off a commutator stone.

  14. #14
    Join Date
    May 2008
    Location
    Orange, TX
    Posts
    16,609

    Re: Sa200

    The arcing could be a result of jacking with the rack. It can have that effect.

    Plus by dropping the OCV you also decreased the arc voltage which can cause the arc to snuff out. I'd be willing to bet your OCVs are dropping below 90 after burning rod for an hour or so to warm the generator a bit.

    I'd suggest putting the rack back to factory and use the Coarse Range and Fine Voltage "Shield-Arc" controls as designed.
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  15. #15
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    It was 94-94.5 cold and dropped to around 92 when I ran it for an hour. What do you usually set yours to Duane?

  16. #16
    Join Date
    May 2008
    Location
    Orange, TX
    Posts
    16,609

    Re: Sa200

    98-100V cold is not unusual.

    OCV and Other Specs.pdfOCV and Other Specs.pdf

    Note the "Long Test" procedure description.
    MM200 w/Spoolmatic 1
    Syncrowave 180SD
    Bobcat 225G Plus - LP/NG
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    '68 Red Face Code #6633 project
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    Save 2nd Base!

  17. #17
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    Thanks for the info. I was thinking of trading out the brushes with the dual wire brushes. Anything good or bad about them.

  18. #18
    Join Date
    May 2008
    Location
    Orange, TX
    Posts
    16,609

    Re: Sa200

    Smoke-n-mirrors IMO.
    MM200 w/Spoolmatic 1
    Syncrowave 180SD
    Bobcat 225G Plus - LP/NG
    MUTT Suitcase Wirefeeder
    WC-1S/Spoolmatic 1
    HF-251D-1
    PakMaster 100XL
    '68 Red Face Code #6633 project
    Star Jet 21-110

    Save 2nd Base!

  19. #19
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    Ok I was swapped an engine on another welder and it was doing the same thing. I checked the engine rpm and it was low so I brought it upto 1550 and it smartened right up and welds like a dream OCV is 94.5 and 131aux volts. I figured I'd play with the idle on my red face and turned upto 1570 and it welds smooth too but I have my OCV set to 95 but my aux is 137. If I dropped my idle down to 1520 my aux drops to 131-132 but rod starts cutting out again on low rheostat settings. Is there any way to keep rpms up but drop aux volts?

  20. #20
    Join Date
    Mar 2013
    Posts
    12

    Re: Sa200

    Nevermind I switched out a different exciter and it's at 129 now

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