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Tips, Techniques, and Questions -- Technical questions or tips |
2014-08-26, 8:45am
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Junior Member
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Join Date: Apr 21, 2014
Location: Central Florida
Posts: 15
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Kiln question...
I have a question about my kiln. It is a small Jen Ken bead box I bought used. The inside is about 6 X 6 X 4. It has an infinity switch for temperature control. My problem is that once it gets heated up, I can't get it to cool down at a proper rate. Even on the lowest setting the temperature stays around 900 degrees. So I order to cool down slowly I have been turning it off and on manually every few minutes in an effort to keep things from cooling down too fast. Not very fun. Has anyone had this issue? I realize the best solution is probably to purchase a digital controller but that will cost me around $250. I will buy it if I have to but I wanted to get some input from some members here before I do.
Thanks!
Jason
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2014-08-26, 9:14am
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Senior Member
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Join Date: Jul 14, 2006
Location: Northern Virginia
Posts: 2,366
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A fire brick kiln will stay heated for a long time once it's been at a holding/garaging temperature while you're making beads. And the more you have in the kiln, the longer it will take to cool down. You could try a test by running it empty, and hold at your garaging temp for at least an hour, then turn it off. See how long it takes to cool down naturally. That will give you a starting point of how long it stays at the critical temperatures. Unfortunately, with an infinite switch, you're left with a lot of guessing and kiln-sitting.
If you're making small beads, you could probably just turn it off when you're finished with your session and the heat retention would take care of it. The larger the beads, the more you need a controlled cycle.
Good luck!
Mimi
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2014-08-26, 9:22am
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Senior Member
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Join Date: Jan 23, 2006
Posts: 1,229
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I vote for
you need to get the controller.
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2014-08-26, 11:43am
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specializing in obnoxious
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Join Date: Jul 19, 2008
Location: Sacramento California
Posts: 558
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My small kiln has a lid that I open very gradually to decrease the temperature as needed. It does require a level of babysitting that my larger digitally controlled kiln doesn't, but so far, it works for me.
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2014-08-26, 4:29pm
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Junior Member
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Join Date: Apr 21, 2014
Location: Central Florida
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Thanks for the advice everyone. I will try to watch and see exactly the speed in which it actually cools down. Cracking the lid seems like a good idea too. I will just have to limp by until I get up off my wallet and buy the controller
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2014-08-28, 12:29pm
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KILN BUILDIN FOOL
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Join Date: Jun 14, 2005
Location: OREGON COAST
Posts: 1,738
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there is a small screw on the infinite switch, back it out a turn, it will allow it to go lower in temp
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2014-08-28, 6:35pm
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Senior Member
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Join Date: Apr 08, 2011
Location: NC
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I wouldn't invest in a digital controller for this little hot box style. Save your money and get a true annealer or a kiln that can do double duty for beads and for fusing, maybe even one that runs on 220.
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Barbara
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2014-08-31, 4:09pm
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Junior Member
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Join Date: Apr 21, 2014
Location: Central Florida
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Thanks for the input everyone! I also received some great advice from a couple of private messages. I have acquired a digital temperature controller and an SSR from some scrapped equipment at my job. I am going to use these to control my kiln. The only issue is that the controller is not programmable. I am OK with that for now as I will at least be able to set the kiln to an exact temperature. Will still require a level of babysitting but at least it isn't going to cost me any money right now. Later on I will likely upgrade to a bigger and better kiln. Thanks again!
Jason
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2014-08-31, 7:38pm
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Free is never underrated!
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Barbara
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2014-09-09, 6:37am
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Member
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Join Date: Jun 13, 2007
Posts: 43
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Quote:
Originally Posted by jwhicks
I have a question about my kiln. It is a small Jen Ken bead box I bought used. The inside is about 6 X 6 X 4. It has an infinity switch for temperature control. My problem is that once it gets heated up, I can't get it to cool down at a proper rate. Even on the lowest setting the temperature stays around 900 degrees. So I order to cool down slowly I have been turning it off and on manually every few minutes in an effort to keep things from cooling down too fast.
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Can you hear the infinite control switch cycle on and off when the switch is in the low position?
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
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2014-09-09, 10:13am
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Junior Member
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Join Date: Apr 21, 2014
Location: Central Florida
Posts: 15
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Yes, I could hear the switch cycle on and off while on low. I never really timed the cycle periods, however. I adjusted the screw as suggested by GLASSFREEK and that helped. But I have since hooked up a digital controller and an SSR. This arrangement seems to be working pretty good for me.
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