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  1. #1
    Join Date
    Dec 2011
    Posts
    5

    Default Millermatic 130 wire feed problem

    Happy Holidays everyone,

    My Millermatic 130 is not feeding wire.

    S/N: Kd452184

    I've troubleshooted the gun cable, and switched out the circuit board with a working 130. This has not fixed the problem. Was thinking the drive motor might be the issue. Any pointers would be great, Thanks.

  2. #2
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,470

    Default

    Could be the motor, more likely a failed control relay CR1, stuck in between ranges. or you have no weld output . motor needs weld output to run

  3. #3
    Join Date
    Aug 2008
    Location
    Orange, TX
    Posts
    1,164

    Default

    Is the fan motor running? Combination motor/transformer provides 24VAC power to control board PC1.

    Do you have DC open circuit voltage (OCV) between the weld output terminals with the trigger pulled?

    Answers to the above will determine where to look next.
    MM200 w/spot controller and Spoolmatic 1
    Syncrowave 180 SD
    Bobcat 225G Plus LPG/NG w/14-pin*
    *Homemade Suitcase Wire Feeder
    *HF-251D-1
    *WC-1S & Spoolmatic 1
    PakMaster 100XL
    Marquette "Star Jet" 21-110

  4. #4
    Join Date
    Dec 2011
    Posts
    5

    Default

    Duane,

    Yes the fan is running. Whats the best way to check for your second question regarding the voltage between the weld output terminals?

    Thanks

  5. #5
    Join Date
    Aug 2008
    Location
    Orange, TX
    Posts
    1,164

    Default

    Just clamp the black VOM test probe in the work clamp and touch the red test probe to the gun tip and pull the trigger is the easiest way.

    You also need to confirm there is 24VAC output from the fan motor/transformer on wires #5 and #15 going to the control board. At the control board it would be wires #5 and #6 (PC1 terminals E and G).

    The wiring diagram should be on the inside of the unit wrapper but you can download the manual here http://www.millerwelds.com/om/o1309b_mil.pdf if you don't have it for reference.
    MM200 w/spot controller and Spoolmatic 1
    Syncrowave 180 SD
    Bobcat 225G Plus LPG/NG w/14-pin*
    *Homemade Suitcase Wire Feeder
    *HF-251D-1
    *WC-1S & Spoolmatic 1
    PakMaster 100XL
    Marquette "Star Jet" 21-110

  6. #6
    Join Date
    Dec 2011
    Posts
    5

    Default

    Duane,

    I tested the weld output by pulling the trigger and came up with 20.9. I found the terminals E and G on the circuit card, but wasnt sure how you tested them, could you explain a little further. I also switched out the relay CR1 with a good one, still nothing.

  7. #7
    Join Date
    Aug 2008
    Location
    Orange, TX
    Posts
    1,164

    Default

    I didn't mention it before but that OCV should be ~30VDC at the maximum setting so I presume your test was at a lower position. Range #1 should yield approximately your 20.9VDC result but regardless, you have sufficient OCV for motor operation.

    To test for the required 24VAC control power, you would simply insert your VOM test probes into the backside of PC1 plug PLG2 to contact the wire terminals at cavities E & G. Because you have weld output OCV, control relay CR2 is working which means you have 24VAC control voltage.

    While at PLG2, check for DC voltage at cavities A (-) and D(+) - which should closely match your OCV - to confirm motor drive supply voltage to PC1.

    If OCV readings are OK at PLG2, you can check motor operation by applying DC voltage to the motor leads with CR1 removed (disables motor brake circuit). You can use a 6-12V battery or even the OCV from the unit itself using some jumper leads.

    The next thing to check would be the wire feed speed (WFS) control rheostat R1. With it disconnected from its circuits, you should get a resistance of ~16ohms to 0 between the wiper terminal (wire# 10) and outer terminal (wire#29) as you rotate the control.


    If the motor operates using the external voltage source and the rheostat checks out OK, I'm afraid everything would point to a defective PC1.
    MM200 w/spot controller and Spoolmatic 1
    Syncrowave 180 SD
    Bobcat 225G Plus LPG/NG w/14-pin*
    *Homemade Suitcase Wire Feeder
    *HF-251D-1
    *WC-1S & Spoolmatic 1
    PakMaster 100XL
    Marquette "Star Jet" 21-110

  8. #8
    Join Date
    Dec 2011
    Posts
    5

    Default

    Thanks Duane,

    I will look at these areas next week and get back with you.
    Thanks a million, Merry Christmas

  9. #9
    Join Date
    Dec 2011
    Posts
    5

    Default

    Figured out the problem, drive motor for the wire feed is froze up. Thanks for the help Duane.... just gotta find a part if its cheap, if anyone has one its part number 173 446

    Thanks

  10. #10
    Join Date
    Oct 2004
    Location
    Edmonton, Alberta
    Posts
    7,470

    Default

    This drive motor appears to be rather expensive, and its usually a gear box problem anyways, best to strip it down clean and regrease it.

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