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Miller Shopmaster 300 Problem - j96simmons

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  • Miller Shopmaster 300 Problem - j96simmons

    j96simmons has a problem with his Shopmaster...

    but has been unable to post... guess the software got upgraded again and is acting up,,, (BTW... the EMail notification has been inop for a while too)

    So he PM'd me and I posted it..

    "I have been trying to make a post about a welder problem but for three days it does not work I just get a pop up that a mod need to approve my post but it never gets posted ..... I see you help a lot of people so I sent you this pm.. with the post I have tried to make.

    miller shopmaster 300 only maximum weld output in cv

    Hi I have a miller shopmaster 300 and in CC the voltage/current settings work just fine from the front panel or from a foot pedal when tig welding but when I switch to CV for my wire feeder it is stuck at max voltage/current no matter what the knob is set at.

    I have took the side panels off and looked for anything obvious but all looks good any help you could give me would be great .............. Thanks "
    Last edited by H80N; 02-23-2014, 06:03 PM.
    .

    *******************************************
    The more you know, The better you know, How little you know

    “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

    Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

    My Blue Stuff:
    Dynasty 350DX Tigrunner
    Dynasty 200DX
    Millermatic 350P w/25ft Alumapro & 30A
    Millermatic 200

    TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

  • #2
    Thank you H80N

    Comment


    • #3
      Originally posted by j96simmons View Post
      Thank you H80N
      You are welcome...

      Could you please post the serial number so that the trained welder techs like Cruizer or Miller Kevin have a baseline to look up the correct schematics and docs..

      also if you could go into more detail of your problem...

      .. have you downloaded the manual and doublechecked to make sure that all of your settings are correct..??

      http://www.millerwelds.com/service/ownersmanuals.php
      Last edited by H80N; 02-24-2014, 09:02 AM.
      .

      *******************************************
      The more you know, The better you know, How little you know

      “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

      Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

      My Blue Stuff:
      Dynasty 350DX Tigrunner
      Dynasty 200DX
      Millermatic 350P w/25ft Alumapro & 30A
      Millermatic 200

      TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

      Comment


      • #4
        Bump...
        .

        *******************************************
        The more you know, The better you know, How little you know

        “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

        Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

        My Blue Stuff:
        Dynasty 350DX Tigrunner
        Dynasty 200DX
        Millermatic 350P w/25ft Alumapro & 30A
        Millermatic 200

        TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

        Comment


        • #5
          The serial number is KC286638

          I know the settings are correct... If I hook this feeder up to my CC/CV trailblazer it works fine so I know it does not have anything to do with the feeder.

          I do have a owners manual and under trouble shooting for "Unit provides only maximum or minimum weld output the remedy is check control board or check Hall Device HD1

          But since my welder amp/voltage control works fine in stick or tig "CC" I am hoping it may be something I can fix.

          Comment


          • #6
            Originally posted by j96simmons View Post
            The serial number is KC286638

            I know the settings are correct... If I hook this feeder up to my CC/CV trailblazer it works fine so I know it does not have anything to do with the feeder.

            I do have a owners manual and under trouble shooting for "Unit provides only maximum or minimum weld output the remedy is check control board or check Hall Device HD1

            But since my welder amp/voltage control works fine in stick or tig "CC" I am hoping it may be something I can fix.
            Hopefully Cruizer will check in .... with a fix..

            looks like it was built in the second half of 1992..
            .

            *******************************************
            The more you know, The better you know, How little you know

            “The bitterness of poor quality remains long after the sweetness of low price is forgotten”

            Buy the best tools you can afford.. Learn to use them to the best of your ability.. and take care of them...

            My Blue Stuff:
            Dynasty 350DX Tigrunner
            Dynasty 200DX
            Millermatic 350P w/25ft Alumapro & 30A
            Millermatic 200

            TONS of Non-Blue Equip, plus CNC Mill, Lathes & a Plasmacam w/ PowerMax-1000

            Comment


            • #7
              [QUOTE=H80N;317892]Hopefully Cruizer will check in .... with a fix..
              QUOTE]

              That would be great.

              Comment


              • #8
                Well its not your hall cause the unit works in CC, It would be my guess that the unit really isn't switching all the way to CV, ie, the little microswitch is bent

                Comment


                • #9
                  Thanks for the reply cruizer I went out and checked the the little micro switches found two one that switches on in all modes AC CC and CV and one that only switches on when in CV mode.

                  I checked that they were working with a ohm meter and both work fine.
                  What would be the next thing to check?

                  Thanks Jason

                  Comment


                  • #10
                    What would be the next thing to check?

                    Comment


                    • #11
                      someone anyone ?

                      Comment


                      • #12
                        In addition to checking the limit switch LS1 you've already looked at, for max only output in CV mode, the book says to also check:

                        1) Control Relay CR2
                        2) Rectifier SR2
                        3) Control board PC1 and its connections.
                        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

                        Comment


                        • #13
                          Originally posted by duaneb55 View Post
                          In addition to checking the limit switch LS1 you've already looked at, for max only output in CV mode, the book says to also check:

                          1) Control Relay CR2
                          2) Rectifier SR2
                          3) Control board PC1 and its connections.
                          Thank you sir I have ordered CR2 relay and SR2 rectifier...
                          I hope one of them fix it. I could not find PC1 control board but it looks like it will be very expensive will let everyone know how it turns out.

                          Thank you

                          Comment


                          • #14
                            SR2 rectifier

                            I am having the same problem as j96simmons had with his shopmaster 300. After reading these post I checked the control relay CR2 and it is burnt, after testing, I would like to replace the SR2 rectifier but there is no name or numbers on it, can anyone tell me the correct rectifier to buy for this machine (amp and volt rating). Thanks

                            Comment

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