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Old 07-15-2002, 08:50 AM
Kurt Walrath's Avatar
Kurt Walrath Kurt Walrath is offline
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Join Date: Apr 2002
Location: Corning
Posts: 155
Kurt Walrath is on a distinguished road
Yes for the most part 24/7 ( with a weekend
off here and there)in a production, make
a meager living off it environment.

I don't know what you are doing but I know that
my furnace design gets long life, I suspect due
to the fact that the elements are in a separate
chamber from the batch. Long element life is not all that
it's cracked up to be however. the last
few months of those elements it was taking forever
to melt as they lost power. the power loss is gradual
as they age and you don't notice it while
it's happening. you really notice it when you put
a new set in and are able to quit charging 3 hours
earlier than the last time. I think maybe I
will start looking for a surplus hourmeter to
put on my furnace to keep better track of the element life.
I hope to have the dicipline to
put new elements in next time before the old ones wear out
and quit. I charge 3 times a week and would rather
finish sooner than later.

I think that the Denver design
is so poor that it has created a concern
about "element life" that would not exist if you
never started marketing something as ill suited
to melting studio glass as their design is. I know
that some people have made it work by jumping thru
hoops but putting the elements behind the pot and
out of harms way just makes lots more sense.
No offence intended to those of you using Denvers
but I can't imagine wanting to hold at a melt temperature for 24 hours
just so you can melt a few degrees colder and try to coax a little extra
"life " out of the elements.
I already suffer in my production by not being able
to empty my pot after a days blowing and be able
to refill it quickly enough to begin blowing the
next morning. The wound elements won't put out enough power
in my design to melt, cook, fine, and
squeeze 70 - 100#'s of batch overnight. I've seen
gas fired units that pull that off with no trouble
but my furnace was cheap to build and I got what I payed for.

My oven has very low thermal mass but I regularly
finish blowing with 10-20 #'s of glass in the bottom
and pull the plug to go to a show. it cools at a rate far slower
than the 200 degrees per hour that I bring it back up. This is a small "perk" that I enjoy with
my furnace.
http://www.kurtwalrath.com/largeglassstudio/furnace.htm
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