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lukeseall

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  1. Well thanks for helping me get to the answer. I'll probably have to start a new thread when it comes to fitting them!
  2. Thanks Bill. I sort of know what you mean. Assuming my readings are accurate then the elements have between 10% and 16% increase in ohms. Which means I need some new ones I guess.
  3. Thanks all. Have asked the kiln manufacturer for resistance values and will get the multimeter out tonight!
  4. I was wondering if someone could cast an experienced eye over these elements for me and tell me if you think they need replacing? I suspect they do as my kiln struggles over 1100 degC. Not really sure what to look for in a knackered element though. Is it sensible to replace all elements at once? Or is it possible that some wear out faster than others and you don't always need to replace them all in one go? Thanks Luke
  5. Thank you so much for taking the time to help me, especially MMR! Much appreciated. One question - if I fired the kiln empty with just furniture and cones, would it heat significantly different to when it’s full? I’m thinking about just doing a few test fires to try and narrow down what cone I’m actually achieving.
  6. See attached. This pad actually broke in kiln but other one was the same and intact. Cones are all different colours before depending on which cone. After they are all white.
  7. Errrrm. No idea. Bought the kiln second hand but the documents that came with it imply that the controller is compatible.
  8. Homemade pads. I set the cones to the same angle as when the are on a flat surface. But they haven’t just bent they completely melted. Can’t see how they could have gotten wet. Had some on bottom shelf and some on top shelf. Both ended up the same. Glazes actually look look pretty good but have only fired twice so not much to compare with. Controller is electric. Wondering if temp gauge is faulty but 12 hours seems like a reasonably amount of time. And melting a cone 8 cone when I was only aiming for cone 4 temp seems too extreme. Would leaving the kiln to cool down for 24 hours cause them to melt?
  9. Electric kiln. 80 litres. 7kw. 100 degC per hour up to 600 then full speed up to full temp then 15 min hold. Then it takes about a day to cool down. Thanks for for help btw!
  10. Sorry I meant 1200 not 2000 yes I double checked the cones are correct. That was my first thought.
  11. My pyrotechnic cones are completely melting rather than just bending. I'm a bit baffled. On my first ever glaze firing I was aiming for Cone 5 and set controller to go up to 2000 deg C. I put a 3 orton cones in (4, 5 ,6) . the firing took 13.5 hours and all the cones completely melted. I assumed that the firing was a bit slow and I was over firing. So the second ever firing, I reduced the target temperature to 1186 deg C. This time I put in 5 orton cones (4, 5, 6, 7, 8). The firing took 12 hours and still all the cones melted. Even the cone 8! I am quite new to this but surely I can't have reached cone 8 with that firing? I'm not wondering if I'm using the cones wrong or something. Any advice very welcome!
  12. Hmmm... It is a 32amp plug so it goes straight to the fuse box, although it has to travel quite a long way. Maybe that is the issue. Well, the controller allows me to set a deg/hour rate, which I set according to a firing schedule I researched. So from that I can work out how long firing should take to reach a certain temperature. Assuming it actually heats up at that rate, which on the Bisque firing it did. Is it normal for the temp rise to slow down as it gets hotter? Perhaps I am being naive to think it would rise at the rate set on the controller? In the end it was going for 18 hours and hit 1239deg and I switched it off as I didn't want to leave it overnight knowing it might not be functioning very well. I don't mind if it takes a long time to reach temperature, but the fact the temperature keeps dropping then rising again suggests to me that it is not right.
  13. Thanks Mark. I don't have a bung for the top hole in the lid. Would leaving this hole "un-bunged" prevent it reaching temperature?
  14. I have just bought a second hand top loading electric kiln (Potterycrafts P5976 Electric Toploader). I completed a bisque firing to 1000 deg successfully. I have been glaze firing today to 1240deg but from about 1170deg it has been struggling to gain temperature. And at times it drops up to 10 degrees before it goes up again.I have two bungs in the holes in the side but not one in the lid. I'm fairly new to this so not sure if that is correct or not. Any ideas what the issue might be? The person I bought it from said that the elements were replaced recently.I'm not sure what to do now because its been firing for waaaay longer than expected and still not up to 1240. Any advice for a newbie would be greatly appreciated!Thanks
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