RE: (ET) Elec-Trak.Com updates - Arc Welder - band resistors - ar c stability . . .

[Klein Robert W NPRI <KleinRW Npt NUWC Navy Mil>]

OK John,  


As soon as I get a welder in front of me I'll photograph as much as 
possible and see about generating a schematic.  I do have access to a 
6-digit DVM which I'm sure will help.  

I don't think it's as simple as some ribbon resistors.... But I'll find 
out and report back.

The pressure you put me under.......

Bob K 

-----Original Message-----
From: John B Reinhard [mailto:reinharj frontiernet net] 
Sent: Friday, January 14, 2005 2:10 PM
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) Elec-Trak.Com updates - Arc Welder - band resistors - 
arc stability . . .


I just searched the mail list archives (what a great resource !) and 
confirmed my previous comment (which was probably based on the original 
reading of the thread a few years ago !) , and Chris Zach's.

I have a spare set of coils from the front of a dismantled E-12 - so I 
would REALLY like to know exactly how similar these are to what is in the 
welder. It will still be great to get Bob Klein's analysis - maybe exact 
resistance measurement of the resistors (would probably require 6 digit 
DVM, though) - and physical - length, width, thickness. Also, maybe 
pictures ?

A thread in 2002 or so talked about using the welder - and its internal 
components - almost none - as Chris said.

An interesting part of the whole thread was mention of arc stability - 
maybe it changed as batteries lost power some ?

The manual suggests NOT running the welding while charger is plugged in. 
But, since most welding is in short bursts, maybe a trigger control 
(already on my spool gun) or switch (built into a rest for a stick welder 
electrode
holder) could engage/disengage the charger between bursts - and keep the 
batteries at peak power for every single weld.

Of course, hydrogen gas from charging might produce an explosion hazard, 
so maybe I should improve the ventilation in the shop . . .

Some people in that thread mentioned arc stabilizers - reactance coils - 
but I don't see those in the MIG type ReadyWelder or GoWelder products I 
found on the net.



----- Original Message ----- 
From: "Christopher Zach" <czach computer org>
To: "John B Reinhard" <reinharj frontiernet net>
Cc: <elec-trak cosmos phy tufts edu>
Sent: Friday, January 14, 2005 1:19 PM
Subject: Re: (ET) Elec-Trak.Com updates - Arc Welder Manual - Great 
starter info on Arc Welding - Still need results of Bob Klein's work


> From what I have heard it is basically a box with three band 
> resistors, and an overheat clixon to shut down if the resistors get 
> too hot. Think the resistors on the front of an E-12 to E-20 for 
> examples.
>
> Not really complicated to be honest. It's basically a short that is 
> modulated by the resistors.
>
> Chris
>
> > So, I can't wait to see what Bob Klein finds inside the box. ( maybe 
> > just a few 200 amp rated nichrome ribbons ? )
>
>
>
>



_______________________________________________
Elec-trak mailing list
Elec-trak cosmos phy tufts edu 
https://cosmos.phy.tufts.edu/mailman/listinfo/elec-trak