What's that Lassie? You say that Winston fell down the old
sci.engr.joining.welding mine and will die if we don't mount a rescue
by Sun, 18 Apr 2010 21:06:55 -0700:
Mine started doing that at low amps(tig) but was fine at 100A(stick).
I got a new one from northern tools. Looks like the same model.
Exact same head gear.
I took the old HF one apart to see if I could get at the batteries.
Thing was welded together real good, but I got it opened.
Batteries are two lithium coin cells, that have solder tabs on them,
soldered into the circuit board. Gave up at that point, since I beat
the crap out of the case to get it opened.
I got my use out of it. In future I will look for one that has
I've got one of Harbor Freight's helmets.
I only weld periodically, so before using the helmet I let it charge in the
sunlight for about 15 minutes as Gunner suggested.
I then test it by looking at a bare lightbulb, or a strong sun reflection on
a metal surface.
Shade should dim...
If it dims, you're good to go...
Ain't it ridiculous? You can get a decent watch at a yard sale for a buck,
and then, it's $5 to $8 for a battery.
It's as big a scam as printer ink. They should GIVE you printers for what
you have to pay for a lifetime of ink for them.
I always pick up four batteries when they are on sale. I would buy more,
but I don't like them sitting around that long before use. Then I use a
little digital meter to test the old one and the new one. And older weak
one will still function down to a certain level, but I like to keep one in
there that's "hot".
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Note that you can significantly extend the shelf life of a cell
or battery by refrigerating it. You probably don't want to truly freeze
it, as that could burst the cell, but put them in a ziploc baggie and
keep them in the unfrozen food section of the 'fridge.
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Better living through chemistry!!!
[ but I don't like them sitting around that long before use.
just a note: one place I've found very inexpensive (maybe $3 for a
pack of 4 or 6) button cells of all sizes is at Princess Auto which I
suppose is the Canadian equivalent to HF....certainly carries much of
the same re-branded stuff, so you might look there if you are in need.
Yes, it is 100% safe to weld with a non-darkening helmet, it is just
inconvenient. Even when it does not darken, it blocks IR and UV, and
actually provides some darkening as well. Dark or not, it provides
about same level of protection.
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