Started today at about 11:00 a.m. with the Cone 04 firing. 7 hrs. and 10 minutes later, about 6:00 p.m. the program ended. The cone was just above the shelf and the temp was at 1945 degrees F.
So I am concluding that the thermocouple is properly calibrated and the program is about right. I'm actually very impressed that they wrote these programs so they hit the cone energy values as close as they did.
It's 9:00 p.m. and the temp is down to 618 degrees F. At first is dropped 600 degrees + in the first hour, then slowed. I used to know the formula for this. The rate is logarithmically related to the difference between the temperatures I believe.
The picture here is at the beginning of the cycle. I kept the lid cracked for about 90 minutes. As it approached 500 -600 degrees F I noticed some burning like smell coming out. So the glaze gases something as it gets hot.
I had some trouble positioning the cones. I thought they would be OK. The pictures here show them before I started.
Oh, it rained a little today. The work around is working OK. I discovered I need something like a porch roof. So I need to extend the roof about two feet. I think I'll do this with a light weight 1 inch square tube instead of the 2 inch square tube.
The final solution is going to be an elevated floor in the shed. There's plenty of room for that. That'll make it as weather proof as any building.
Later,
John
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