Mike's book (was Re: [TheForge] FW: Didymium? I say "no way.")

[Mike Porter]

Hi Justin,
To begin with, H.F.sells two different darkening hoods. All that I've heard 
spoken against them is that their electronics can "stick" when the 
temperature gets cold enough. ANSI Z87.1-2003 Table 3 goes into testing for 
this problem pretty thoroughly, so I'd say it isn't rare. If you're having 
the problem, you know it, if not you're probably just fine.

You wrote "White's glasses and the Auralens units are pretty much the 
answer.
> Expensive, yes, but a hundred bucks for long term vision is cheap. Did
> I get that bottom line right?" You sure did! But only as the bottom line, 
> not as the end of the line. The AGW-300 lens didn't even exist when I 
> started writing the vision enhancement chapter. There are new dichroic 
> lenses being tested which will put even the TM 2000 into retirement. 
> Should you wait for them? I didn't; what tomorrow will bring is fine and 
> dandy, but my eyes need protecting today.
Mike P.



----- Original Message ----- 
From: "Justin Fellenz" <sunironworks at yahoo.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, February 10, 2006 7:06 AM
Subject: Re: Mike's book (was Re: [TheForge] FW: Didymium? I say "no way.")


> Mike,
>
> Thanks for all the great information about safety. Suonds like Kent
> White's glasses and the Auralens units are pretty much the answer.
> Expensive, yes, but a hundred bucks for long term vision is cheap. Did
> I get that bottom line right?
>
> The note below brings up another question worthy of your knowledge. I
> have a cheap harbor freight auto darkening welding helmet. I wonder if
> there is a difference in protection between that and the much more
> expensive good-brand units. Mine has an adjustable response time and I
> don't notice a lot of welder's flash after a day of welding (I just
> became aware of the dangers of reflected light inside the helmet--that
> I've gotten flash from). I accept that the cheap ones are nowhere near
> as durable as the good ones, but I can buy and break 4 HF ones for the
> cost of a good one. If the protection's no good, though, they're
> worthless if they pay me to haul em away.
>
> JRF
>
> --- Gabriel Cain <gabriel at dreamingcrow.com> wrote:
>
>>
>> Mike,
>>
>> I for one found your designs very useful; I'm using your 1"
>> forge/furnace burner design in my forge, and it is quite effective.
>>
>> My forge is a cast satanite in 11" of O2 cylinder.  The volume of it
>> is
>> about 190 cubic inches.  It reaches a useable saturated heat in about
>> 20
>> minutes at about 10 psi.   I peak out around a bright yellow.  No
>> welding heat, tho.
>>
>> I use a auto-darkening hood for my mig welding; a lincoln SP-135T.
>>
>>
>> -- 
>> Gabriel Cain        President
>> Dreaming Crow Services gabriel at dreamingcrow.com
>> Mobile 425-418-8166            P.O.Box 15605
>> Fax  206-774-6416        Seattle, WA 98115
>>
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>
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