Fire Kiln with Cones

Fire Kiln with Cones

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  1. On the next firing make up "cone packs" for each thermocouple.
  2. Once the cone packs are positioned on shelves and are visible through the peepholes, fire the kiln to the middle cone's number
  3. Start watching cones near the end of firing.
  4. Keep checking the control display to make sure it does not say CPLt.
  5. If the middle cones did not go down together then immediately note the differences in each thermocouple reading from the one thermocouple the same zone as the first cone that went down. Change the final set point of your program to reflect the difference.
  6. If the kiln is firing too hot then lower the final set point.
  7. If the kiln shut itself off before bending the cones properly, reprogram it and then restart it as quickly as possible. Record the temperature at which the kiln shut down. Stop and restart the kiln. Reprogram the same program to one cone number higher. Do these steps quickly. Watch the middle cones again and note at what temperature the cones properly bend. If they bent while you were programming then just offset the temperature by 5 or 6 degrees. Shut the kiln off once you note that temperature.