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This simple answer based on what I know about my wire melter over the years is that every time it is ramped down you risk cracking it.
I went though 2 pots in the first 6 months because I was doing up and down.
Once I started to cycle down to 1400f (25f every hour down to 1400) when I was not working for a week instead of turning it all the way down the pot lasted 3 years. You pay one way or the other as Pete likes to say "no free lunch".
Scott.
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