Those of you who look at this blog occasionally may remember my post of a few weeks ago, when a bunch of serving platters became thousands of shards in my electric kiln. And you may remember my bafflement at that circumstance. Well ... still a bit baffled, but this time the bafflement is all about my electric technology and not about how I was pounding out the platters.
I normally set the Skutt KM-1027 to rise slowly to 160F and sit there for 20 hours to make sure the greenware inside is fully dry. Then I set it to cone 07 and let the temp rise slowly until it hits 1779 or so and shuts down. I did this the other day with a fresh load of greenware, kept an eye on it through the day (it rose to 160 and stayed there for hours), and then at some point in the night it went rogue on me and rose at least to 1300F. That's where it was when I came down in the morning. I hit the "stop" button and it made the requisite "beep."
But it didn't shut down. It just kept pumping. Only way I could stop it was by unplugging the kiln and letting it cool.
I emptied the kiln this morning and the pots appeared to have been bisqued, but they had the sort of dull "thunk" of pots fired below my usual bisque temp. As far as I know, I have no way of telling what temp they fired to. (Maybe the computer stores that somewhere ... ) Anyway, I've gotten in touch with Skutt, but it's the Fourth tomorrow and it's unlikely I'll hear anything for a few days. And I can always (very carefully) bisque in the gas kiln, I guess.
Does anyone have any ideas this time?
I'll attach a couple of photos that have absolutely nothing to do with this problem. I'm preparing a story about my work in photography, so I'll let you see some of those images.
Happy Fourth, everyone!
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5 hours ago