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  1. #11
    Join Date
    Dec 2013
    Location
    At the epicenter of the Green Mountain Range in VT
    Posts
    475

    Default

    I haven't heard it much being explained. I don't know your machine. It took me a while to find the answers. HF is an overrunning high frequency high voltage with low amperage. It does little to transfer heat. Its purpose is to ionize shielding gas creating an interstate highway for the low voltage, in some machines fixed at 60 cycles, high current arc that heats the metal workpiece so it in turn can melt filler. Cleaning points and altering gap will change the frequency of the HF, it won't change the frequency of the welding arc.

  2. #12
    Join Date
    Aug 2014
    Location
    Pahrump NV
    Posts
    9

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    Quote Originally Posted by H80N View Post
    Glad you are starting to get a few things sorted.. but you need to read your manuals and the TIG booklet

    http://www.millerwelds.com/pdf/gtawbook.pdf


    IS DIG FORCE AC Balance control on the Shopmaster 300????

    No it has nothing to do with AC Balance in TIG... it is for Stick welding

    It really messes up beads above 50 and my current is set right around 180 with 3/16 pure tungston. seams to work good. but burning tungston into cup.
    I have been told to keep this adjustment set to Zero while welding steel.
    Turning current down to much from 180 messes up bead. turning down Dig force much messes up bead and turning it up doesn't help much either.

    ON my HF251-1
    I can only play with frequency adjustment from what I read here on web sight,


    Sorry .. you cannot adjust the Frequency.. Just the HF intensity

    I guess I wanna be around 180? currently using it in-between 50 to 100 playing with it trying to learn exactly how it works and what it does.(Pin pointing arc?) adjustment on machine is 0-100 only, And I'm using it at about 70-80 seams to work best.
    Manuals
    I read all factory manuals that were supplied with my machines 50 times now!
    4-5 times before turning it on! and every other book and resource I could find.

    Dig Force
    Miller has a bunch of diffrent manuals for the Shopmaster 300 on line they go by serial number one of the ones I was reading online mentioned that the Dig force control was in fact AC balance control when using machine in AC Tig welding. the manual that was supplied with my machine doesn't say that though.

  3. #13
    Join Date
    Aug 2014
    Location
    Pahrump NV
    Posts
    9

    Default

    Quote Originally Posted by duaneb55 View Post
    Try 1/8" filler max and maybe even 3/32".

    1/16" tungsten is too small for the amperage required to do 3/16" aluminum which is going to be between 180-200A. I would use 1/8" and nothing smaller than 3/32".

    From your description of what your filler rod is doing my guess is your torch angle is too much toward the filler and not toward the base material. This results in overheating the filler causing it to fall off the end instead of melting into the puddle as it should when you attempt to dip. Because it's too big for the task at hand, as soon as it falls off it cools in a blob on the base material.


    Smaller filler, larger tungsten, perhaps more amperage and change your torch angle to almost straight up.
    I had a very short 3/32 tungsten tried it seamed to improve things I have to pick up more and more Argon.

    I am buying gas from an private Airgas dealer supplier and when I get a fresh bottle its only coming with about 1500psi in them is this normal ?
    Our bottles of Nitrogen and Oxygen at at work come with over 3000 psi

    Welded Before
    Yes Gas welding and my Mig Miller Matic 251 welding with it is cheating!
    Any one can Mig weld with that machine very user friendly very friendly.

    I had to take a quarter, half a semester of gas welding for my A&P ticket.
    talked about Tig welding but we didn't do any.

    I have been doing more gas welding lately just to get in habit of using two hands at same time I recenty picket up a Meco mini Torch as well. Nice Torch! super super light

  4. #14
    Join Date
    Nov 2003
    Posts
    3,824

    Default

    Quote Originally Posted by Doright View Post
    Manuals
    I read all factory manuals that were supplied with my machines 50 times now!
    4-5 times before turning it on! and every other book and resource I could find.

    Dig Force
    Miller has a bunch of diffrent manuals for the Shopmaster 300 on line they go by serial number one of the ones I was reading online mentioned that the Dig force control was in fact AC balance control when using machine in AC Tig welding. the manual that was supplied with my machine doesn't say that though.
    Where did you see this??????????????????

    The Shopmaster HAS NO ABILITY TO ADJUST AC BALANCE...

    NONE... ZERO...ZIP...NADA..!!!!

    Do not read more into the manual than is actually printed...

    PLS post your Shopmaster serial number so that we can refer you to the correct version of the manual...pertinent page...

    Otherwise we are just standing in the middle of Groom Lake in Tonopah Howling at the Moon....

    See section 3-1

    http://www.millerwelds.com/om/o322a_mil.pdf


    1 Arc Force (Dig) Control

    For SMAW, control increases short-circuit
    amperage which allows the operator to use
    a very short arc length without sticking the
    electrode.
    Set control at 0 for GTAW. When set at 0
    (zero), short circuit amperage at low arc
    voltage is the same as normal welding
    amperage.





    .

    *******************************************
    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

  5. #15
    Join Date
    Aug 2014
    Location
    Pahrump NV
    Posts
    9

    Default

    I got some more argon and with a new hose to my torch and with Dig set at ZERO and using the Bigger tungsten was able to lay out some beads and even repaired my Broken lawn mower deck drive thing with it YAY!!!!!! my first repair done with my machine!

    I was even able to cobble some beer cans together! with smaller tungsten and lower power settings NO their not pretty welds yet and yes I did blow through a few times but I am welding aluminum for first time!!!!

    Teaching ones self with the help of all you guys and reading my books over and over and even calling a few people and all had the same thing to say:
    "It should be welding fine"
    "Sounds like your doing every thing right it should be welding"
    "sounds like your not getting enough Argon"
    Yes something was wrong with machine It had a hole in my Argon hose Not a Big one but enough to cause a lot of head ache for a beginner trying to teach himself.

    I will get My units serial number and post it tonight.


    THIS WHOLE STORY IS A CREDIT TO MILLER!
    I bought a used machine and in the process of teaching myself how to use it I was able to find people experienced with the machine to help me with it enough to tell me It should be working FINE and when it wasn't, I was able to trouble shoot the thing enough to figure out my problem in my case I had an argon flow issue at the Torch but being a novice beginner welder I didn't know how much flow I should have! so when asked if there was flow I said yes I had flow little did I know or understand that I wasn't getting enough flow!!!!

    Burning the Tungsten into the cup & Black burning was the biggest hint every one should have caught and a even a few said and asked if I had argon flow!!! and I did have some flow but it wasn't enough flow!
    I went through my trouble shooting guide again and in my Miller book and it repeatedly said Argon flow too low, I went hunting and sure enough I had a leak. Put new hose on and Now I can weld!

    LETS SEE ANY CHINA MADE MACHINE USER HAVE THE SAME STORY.
    Yes an experienced welder would have caught it quick IN PERSON but I am in middle of no wear desert teaching myself trouble shooting a machine I know little about about a subject I know even less about all I could do is call others and post on this forum and read the book, Not a story a user of a China machine will be able tell.

    Thanks Miller!
    Thanks for making the best welders in the world, I bought a Miller when a friend of mine had a 30 year old welder that broke and Miller had a replacement part to him within 24 hours! get service and parts like that from any other manufacture I think not! Its because of that I didnt mind buying a Used miller machine I knew I would be able to get parts for any Miller I bought for years to come without issue.

    This is why Miller the IS the best in the world!!!!

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