So I finally got a set of elements put into the furnace. I ran them up to 1600f for a couple of hours to sort them out a bit. It also helps to put a black oxidized coat on the elements that "they say" helps them last longer. The set I got from Duralite seems to be more robust than the original set of elements that came with the furnace. We will see how they last. When I left this morning it was at 1000f on the way up to 2125f which is the temp that I will start to charge the furnace. Should hit that sometime tomorrow around 6pm.
For those of you that want to know how to ramp up and ramp down a furnace without cracking the pot/killing it here is the skinny. In the most simple terms possible:
From room temp to 700f you ramp it up 50f per hour.
Then from 700f to 1400f you ramp it at 25f per hour. This is the critical point that glass goes though crystalization and will either expand or contract depending on if you are cooling or heating it. This is what puts that stress on the pot.
From 1400f to 2150f I ramp at 50f per hour again but once you clear 1600f you can just ramp up at full speed. At this point the glass is pretty much melted and your pot is hot enough to not care.
So looks like I will be dumping glass in the pot on Tuesday, have a melt by Wed. if I am lucky and I can crank out some work.
Large Paperweight type things for business here in town
Busy bee....need to switch into a couple other projects as well....but those will come later.
Hope you guys had a great weekend.