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Re: Welder Selection for Current Limiting
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: Welder Selection for Current Limiting
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From: gcerny-at-ix-dot-netcom-dot-com (Glenn Cerny )
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Date: Thu, 28 Mar 1996 19:44:25 -0800
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>Received: from dfw-ix3.ix-dot-netcom-dot-com (dfw-ix3.ix-dot-netcom-dot-com [206.214.98.3]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with ESMTP id UAA28769 for <tesla-at-grendel.objinc-dot-com>; Thu, 28 Mar 1996 20:47:50 -0700
Gents,
These are also known as "variable reactance" welders.
They are distinguished by having moveable shunt plates
in the core, or by having a moveable core. Most of the
units I have seen have a knob or wheel to convey this
movement to the inner works. RQ's video shows his welder
which appears to be variable shunt type controlled with
lever and lock. The advantage (as I see it) to a knob
controlled system is that you can adjust current levels
while under power. I have not put any serious power into
my coil yet, but the concept has worked well while test
firing a jacobs ladder with my pole transformer using the
welder as ballast. Between the big variac and the welder,
it is smooth and controllable (after the first jolt :-)
Gotta put some resistance in there I guess......
Glenn
>> >>
>> >> I recently purchased a Century "Powerdisk" 230 amp AC welder. I
>> >> found it at Quality Farm & Fleet for $189.95. It is an
infinitely
>> >> adjustable movable core unit with a high and a low range.
>
>> Scott,
>>
>> What are the +- of the above compared to a movable shunt type? I
found a
>> Century 230A model #84230 (movable shunt type) for $175 at Northern
Hydraulic
>> 800-533-5545, is this the same as your unit?
>
>The one I purchased is a movable shunt type. I should not have chosen
the words
>"movable core", for the core itself doesn't move. The model you found