electric kiln problems
Posted 08 November 2012 - 09:28 PM
Am I going to have puddles of glaze on the shelves?
Posted 08 November 2012 - 09:35 PM
Posted 08 November 2012 - 09:42 PM
Contemporary Fine Colored Porcelain
TRY ... FAIL ... LEARN ... REPEAT
Posted 09 November 2012 - 09:19 AM
It should be fine if they were all cone 6 glazes.
Immediate Past President; Potters Council
Professor of Ceramics; New Hampshire Insitute of Art
Posted 31 December 2012 - 01:29 AM
Fired another cone 6 glaze fire. Again, after 30 hours the cone in the kiln sitter never melted.
The glow from the kiln never got beyond orange. I need a pyrometers I guess.
Around 30 hrs I shut the kiln off. Over 1/2 the pots were glossy but the others were
Still chalky looking. Obviously not hitting temp. I guess I need to get an electrician to come
Check out the kiln. Glazes were amaco potters choice glazes. Think I can re-fire?
Posted 31 December 2012 - 02:21 AM
Maybe kiln or supply voltage is different. Need more info .
Yes you can refire them
Posted 31 December 2012 - 02:38 AM
Amaco states that the temperature for PCs is cone 5-6, (2205-2269 degrees F). If some of the pieces are glossy and some are not where were the pieces that are glossy located in the kiln. Could this possibly be a zone fire kiln?
"For God so loved the world that He gave His only begotten Son, that whosoever believeth in Him should not perish but have everlasting life".
Posted 31 December 2012 - 09:00 AM
Have an electrician check the current with an ammeter to see if everything is working. The electrician should be able to pinpoint where there is a problem.
Posted 31 December 2012 - 11:30 PM
Posted 01 January 2013 - 12:40 AM
Last month I had a similar problem. I had a fuse blow, a relay go bad, and a blade on the female plug burn up. All three caused the same problem. You may want to check if you are getting current to the right place. It's possible you didn't get the elements wired well and you are looking at a new problem that looks exactly like the old problem. Also, you may want to look at the plug and see if it's gotten hot. The screws that hold the wires in can work their way out and create resistance that increases heat that burns away material that increases resistance that creates more heat, and so on. I would first turn the kiln on while it is empty and watch through the spy holes to see if the elements get red, or touch the energized elements with some tissue to see if it burns.
I gave up on plugs for this reason above a long time ago and hardwired all my electrics. Never had a plug issue since.
On this note Yedrow mentions the screws-clean your wire connections and coat with an oxidation prohibitor and retighten them down.
Posted 01 January 2013 - 12:58 AM
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