Chris, I use an auto darkening helmet buit the response time is 1 / 25000 of
a second. Never a flash burn to my eyes.
mayf
----- Original Message -----
From: "Chris Hill" <Pirouette@uisreno.com>
To: <BlueGolfer@aol.com>; <Timothy.P.Ronak@akzo-nobel.com>;
<wittsend@jps.net>
Cc: <tigers@autox.team.net>
Sent: Wednesday, January 02, 2002 1:18 AM
Subject: Re: Welding ... kinda long but I got carried away
> Punsfluckett, Throttlebottom, Snead and Purvey have advised me to disavow
any
> recommendation of welding techniques not approved by OSHA, whoever they
are.
> I did want to note that I am very leary of eye exposure in welding.
> Someone here spoke of using a '9' lens for .023 wire, which does make it
> easier, but I'd still never go less than '10'. My helmet is modified with
> leather duct taped to the bottom and side edges so that I CAN safely look
away
> (I still close my eyes) without closing the visor, but still only for
little
> tap bursts.
> I was tempted by the automatic lenses, but, the 'window' of
vulnerability
> before they shade is (if I remember correctly) 1/100th of a sec. That
means
> in essence that for every 100 welds (not a lot with a rusty or wrecked
car)
> you've looked directly into the arc unshielded for a full second. Not
good.
> And that's if you believe it's really 1/100th of a second.
> I don't understand, with all the wireless technology around, why
someone
> hasn't produced something that would key off the trigger and shade 1/100th
> BEFORE the arc started. Now that I'd buy.
>
> Chris Hill
> ----- Original Message -----
> From: BlueGolfer@aol.com
> To: Pirouette@uisreno.com ; Timothy.P.Ronak@akzo-nobel.com ;
> wittsend@jps.net
> Cc: tigers@autox.team.net
> Sent: Thursday, January 03, 2002 4:35 AM
> Subject: Re: Welding ... kinda long but I got carried away
>
>
> In a message dated 1/3/02 5:18:12 AM, Pirouette@uisreno.com writes:
>
> << This is functionally the same as Tim's method, heat is absorbed by
the
> melting blobs, which then provide support on cooling as you move
further,
> but
> it's very fast. I don't even bother putting the visor down for the
blobs
> part, just look away each time since the gun is braced on the metal,
and I
> usually stop briefly after completing the blob ring to let things cool,
> just
> to be antiwarp safe. But after a little practice (very little, this
really
> is
> a fast learning curve), if you don't bother to wait, you can do a hole
> start
> to finish in 20-30 sec. !! And it will look good and be clean solid and
> almost flat metal. >>
>
> Wow, I really appreciate both Chris and Tim sharing their experience.
In
> welding stuff on my Tiger and various ther projects, fixing holes was
> defintiely a needed skill. In addition I would add I sometimes cut
little
> circular disks of scrap metal and welded them in to serve as backing for
the
> holes. Chris' tip about not using the mask was interesting.
>
> Rob
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