| Science Forum Index » Engineering - Joining (Welding) Forum » FCAW with AC?... |
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| dan... |
 Posted: Sun Oct 18, 2009 5:30 pm |
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So I'm looking at those dirt cheap harbor freight flux core welders to
use as a cold wire feeder, and I see that they don't seem to have any
rectifier in them. Are they using AC for FCAW?
--
Dan H.
northshore MA. |
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| SteveB... |
| Posted: Sun Oct 18, 2009 9:06 pm |
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"dan" <notme at (no spam) privacy.net> wrote in message
news:4adca44e.7256413 at (no spam) news20.forteinc.com...
[quote:bed74dd38e]So I'm looking at those dirt cheap harbor freight flux core welders to
use as a cold wire feeder, and I see that they don't seem to have any
rectifier in them. Are they using AC for FCAW?
--
Dan H.
northshore MA.
[/quote:bed74dd38e]
No. |
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| Keith Marshall... |
| Posted: Sun Oct 18, 2009 11:55 pm |
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Actually they ARE using AC on at least one model, if you can believe their
schematics. This was discussed here a while back.
If you compare the schematics for items 94056 and 98871 you'll notice that
they're nearly identical except that 98871 has a single winding on the
secondary of the main transformer and no diodes so it's AC at the gun while
94056 has a center tapped secondary and two diodes.
Best Regards,
Keith Marshall
tooladdict at (no spam) progressivelogic.com
"I'm not grown up enough to be so old!"
"SteveB" <oldfart at (no spam) depends.com> wrote in message
news:pl1tq6-r872.ln1 at (no spam) news.infowest.com...
[quote]
"dan" <notme at (no spam) privacy.net> wrote in message
news:4adca44e.7256413 at (no spam) news20.forteinc.com...
So I'm looking at those dirt cheap harbor freight flux core welders to
use as a cold wire feeder, and I see that they don't seem to have any
rectifier in them. Are they using AC for FCAW?
--
Dan H.
northshore MA.
No.
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| dan... |
| Posted: Mon Oct 19, 2009 6:23 pm |
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What's that Lassie? You say that Keith Marshall fell down the old
sci.engr.joining.welding mine and will die if we don't mount a rescue
by Mon, 19 Oct 2009 01:55:45 -0400:
[quote]Actually they ARE using AC on at least one model, if you can believe their
schematics. This was discussed here a while back.
If you compare the schematics for items 94056 and 98871 you'll notice that
they're nearly identical except that 98871 has a single winding on the
secondary of the main transformer and no diodes so it's AC at the gun while
94056 has a center tapped secondary and two diodes.
Best Regards,
Keith Marshall
[/quote]
Thanks. That's what I thought, but I couldn't believe it.
looks like one has a cooling fan, variable feed control, and AC
current, and the other has no fan, diodes for DC current, and fixed
wire feed.
Two varieties of crap.
--
Dan H.
northshore MA. |
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