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Posted by amdx on May 16, 2007, 2:58 pm
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Hi All,
I just bought a used Sears Craftsman 113.201371 Welder.
I'm curious about the current adjustment, it doesn't have
a tapped transformer. It has a slider that (from the outside)
seems to move into or out of a core.
Does anyone have more info regarding how the adjustment
varies the output? I understand tranformers and inductors,
just trying to end my curiousity before I open it up to see
how it works.
Thanks,
Mike
Just learning to start an arc!
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Posted by Leo Lichtman on May 16, 2007, 4:12 pm
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"amdx" wrote: (clip) It has a slider that (from the outside) seems to move
into or out of a core. Does anyone have more info regarding how the
adjustment varies the output? (clip)
^^^^^^^^^^^^^^^^
If it works like my welder, the core is laminated iron. The farther you
insert it into the coil, the more inductance you introduce, which, of
course, lowers the current.
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Posted by amdx on May 16, 2007, 9:47 pm
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>
> "amdx" wrote: (clip) It has a slider that (from the outside) seems to
> move into or out of a core. Does anyone have more info regarding how the
> adjustment varies the output? (clip)
> ^^^^^^^^^^^^^^^^
> If it works like my welder, the core is laminated iron. The farther you
> insert it into the coil, the more inductance you introduce, which, of
> course, lowers the current.
So would the core be moving into an inductor on the primary of the
transformer?
Or the secondary?
Mike
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Posted by Leo Lichtman on May 17, 2007, 12:04 am
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"amdx" wrote: So would the core be moving into an inductor on the primary
of the
> transformer?
> Or the secondary?
^^^^^^^^^^^^^^^^^^^^
It seems like it would make more sense to run the core in and out of the
primary, because it has more turns of finer wire, but I never thought of
that question, and I really don't know the answer. I would have a hard time
getting mine out where I can look inside, so I will wait for someone else to
answer, or for you to break down and open yours. I'll be interested in
hearing what you find.
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Posted by Grant Erwin on May 18, 2007, 6:58 pm
Please log in for more thread options Leo Lichtman wrote:
> "amdx" wrote: So would the core be moving into an inductor on the primary
> of the
>
>>transformer?
>>Or the secondary?
>
> ^^^^^^^^^^^^^^^^^^^^
> It seems like it would make more sense to run the core in and out of the
> primary, because it has more turns of finer wire, but I never thought of
> that question, and I really don't know the answer. I would have a hard time
> getting mine out where I can look inside, so I will wait for someone else to
> answer, or for you to break down and open yours. I'll be interested in
> hearing what you find.
Why don't you guys quit wondering and look at an exploded parts diagram in a
manual? Most Miller welders' manuals are online, and lots of Lincoln ones too.
GWE
--
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> "amdx" wrote: (clip) It has a slider that (from the outside) seems to
> move into or out of a core. Does anyone have more info regarding how the
> adjustment varies the output? (clip)
> ^^^^^^^^^^^^^^^^
> If it works like my welder, the core is laminated iron. The farther you
> insert it into the coil, the more inductance you introduce, which, of
> course, lowers the current.