Mig Settings Questions

  1. Nick DV

    Nick DV "You must unlearn what you have learned."

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    My new mig has twelve voltage settings whereas my old one only had four, so means that I should be able to dial in everything more easily, but it got me thinking.

    Firstly, is the increase in voltage across the 12 steps linear or not? (I can’t find a spec sheet on the mig to see what the voltage range is.)

    Secondly, the amp range is from 20amps to 240amps, so how does this relate to the voltage steps given that amperage relates to voltage? As this mig has a 220 amp range over 12 steps, can you say that each step increase equates to 20 amps? (I know that wire speed will have an effect the amps.) Hope this makes sense!

    Finally, am I barking up the wrong tree? :doh:
     
  2. Munkul

    Munkul Jack of some trades, Master of none

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    Not sure about linear... I know one of my old MIG sets had 8 steps and they weren't linear. I guess it's suck it and see. Do you have a multimeter? Cos at least you could measure the voltage across the arc in each step.

    Amps are almost independent of volts... the machine is "constant voltage" output. This controls the way the arc burns, but not the amps.

    on some machines, a higher voltage will pull down the arc volts more, especially cheap machines and ones at the top end of their current range. So you may have to use a higher voltage tap than strictly necessary, to get the arc that you want.

    Sometimes, if the arc isn't running right, e.g. sputtering with far too much wirespeed for the voltage, then more volts will sort out the amps, as the wire wasn't burning properly to start with.

    But in the normal running range for a wirespeed, more volts does not equal more amps.

    On most machines, voltage taps have very little effect on amperage, unless it's a "semi synergic" machine that increases the wirespeed with each voltage step.

    Wirespeed = amps.

    (when i say burning, I mean melting, but you get what I mean)
     
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  3. hotponyshoes Member

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    Put a volt meter on it and try each setting will be about the only way to tell for sure.
    They do vary . Some have finer steps for the lower settings, for example
    10a, 15a, 20a, 30, 50, 75, 125, 175, 300, 400
    Made up the numbers but you get the idea..
     
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  4. Nick DV

    Nick DV "You must unlearn what you have learned."

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    Thanks Munkul, great explanation and I get what you are saying. My welder is semi synergic, (Migmaker 240-1), and as I understand 'fine tunes' the wfs when you are close to the correct setting :dontknow: Got a multimeter so where would I connect the probes to when testing - don't want to blow myself up!

    Thanks HPS. Again, understand what you are saying.

    Thanks chaps, it helps to give me a better understanding to how everything works ;)
     
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  5. denlow60

    denlow60 Member

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    shows a well-taken picture of the front of the welding machine? everything
     
  6. Nick DV

    Nick DV "You must unlearn what you have learned."

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    3C12DB6A-8810-4D19-AB3C-64390115FA22.jpeg
     
  7. denlow60

    denlow60 Member

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    is dit jou MIG machiene? Schermafbeelding  100.png
     
  8. Country Joe

    Country Joe Argoshield Dark

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    Between the earth return clamp and the wire/contact tip - or better still, from the euro-socket (the part the wire comes through) as this might give a more reliable connection than the tip, which might not be in perfect, cose contact with the wire?

    You'd have to pull the trigger to get a reading, though.
    Then just switch it throughout all of the settings & take a reading from each one.

    All the Best,
    CJ

    @denlow60 - I can't fully understand your posts?
     
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  9. Nick DV

    Nick DV "You must unlearn what you have learned."

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    Thanks for this info CJ :thumbup:
     
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  10. Country Joe

    Country Joe Argoshield Dark

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    No worries!
    CJ
     
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  11. Nick DV

    Nick DV "You must unlearn what you have learned."

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  12. denlow60

    denlow60 Member

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    I hadn't seen his last post?
     
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  13. Nick DV

    Nick DV "You must unlearn what you have learned."

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    No probs ;)
     
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  14. Country Joe

    Country Joe Argoshield Dark

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    I'm just very easily confused!:doh:
    CJ
     
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  15. armalites Member

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    5,494
    Herefordshire
    Welding tips and tricks have a good video on measuring wire speed and then tweeking the voltage to suit. It's in USA format IE imperial but you get to see what differences settings can make.

    Having wire speed too high acts almost like you have a bad earth
     
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  16. Nick DV

    Nick DV "You must unlearn what you have learned."

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    I'll have a look at that, he makes pretty decent videos :thumbup:
     
  17. denlow60

    denlow60 Member

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    I will eat first and after dinner I will explain how these combinations work 111.jpg
     
  18. Nick DV

    Nick DV "You must unlearn what you have learned."

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    Thanks, enjoy your dinner :thumbup:
     
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  19. daedalusminos Member

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    @Nick DV I have the Oxford 200 lovely welders. I wouldn't worry too much about measuring voltages, just assume typically linear current divisions to get you in the rough area then trial and error.

    It doesn't take long to tune it in and most of the time the wire speed knob will be sitting about mid position.
     
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  20. Nick DV

    Nick DV "You must unlearn what you have learned."

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    Thanks. I’m glad I’ve finally got one :thumbup:
    I’ve had a quick play on the lower settings as I’ve not connected up my new CU yet and I found it easy to dial in get a nice weld. Hopefully this weekend I’ll get the garage power on the new breakers and then wind it right up and see how I get on.
    My questions were just to gain a better understanding of how it all works not having had any formal training ;)
     
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