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View Full Version : Help with AIM kiln issue.



Joseph Corcoran
07-23-2006, 01:38 PM
Hi there folks.

Let me start by saying that any help is this matter would be great.

I purchased a custom AIM kiln in 1997. It is 18x16x21. The price was an amazing $1900 + shipping. The kiln (I was told) was a 240v 15a kiln. The kiln arrived with the top and bottom bricks cracked and I never said anything...didn't want to go through sending it back ect. The kiln brick was also weird, not white it was brown, vermiculite based, and very crumbly. Oh well, let's start blowing glass....

I have used this kiln for almost 9 years, and one day a couple months back I looked inside to see only the top element running. I waited for the kiln to cool and found that the lower element had melted into the brick of the kiln. The elements were "slid" into holes that had grooves on top of them that were smaller than the elements.

I called AIM and told John my problem and he seemed perplexed to how this could have occured. He said most of the modern elements don't degrade like that unless they get some foreign object stuck in them. I couldn't find anything. He looked up my kiln and I ordered 2 new elements to replace the old ones. He told me that I could just pull the bricks out, and use pliers to slide out the elements from their holes. The only problem is they used TONS of pins through these fragile tiny grooves to "hold" the element in place. So I order some new elements for $100 including s/h.

I thought the whole point of making the design with the small grooves was to enable you NOT to have to use large amounts of pins to secure the element?? Needless to say I could not get the old elements out without destroying the vermiculite brick.

So I call John back up and ask him how much new brick would be, and why they would design it like that with fragile brick and narrow grooves, with pins... He makes up some BS about how thats how they sometimes make them, and they need pins to hold them in.

Even when the brick itself would hold the element in???

So I order new white limestone bricks with open "wide-mouth?" grooves, where you just set the element in, and pin it down with 10-12 pins each. I have to wait over a month for the bricks despite over 15 calls with maybe 2 of those calls returned. Now don't get me wrong...John seems like a nice guy, and AIM seems really understaffed, but still that is no excuse for the amount of times I was never called back. cost: $500 including s/h

So here I am, a few weeks ago about ready to start to fix the kiln after the bricks arrive....

I decide to get a new contactor, and wires, etc. I went to the back of my kiln and tried to unplug the kiln from the wall... I finally had to use pliers to pull it out, only to discover to my horror that the plug was BLACK and had been melted in to the wall outlet.

I was perplexed by this, seeing as how the breaker to that wall outlet is 40a, and the wire is 8 guage in the wall, and the outlet is 20a, how a 15a kiln would do this???

I took the contactor in to get it changed out and they said it was a 40a contactor, and that I needed some 50a dryer hose cable, and that the cable they supplied on the kiln is a joke....well the truth was somewhere in between....

I called John back at AIM and told him the story. He told me that they just have a standard contactor they use for their kilns 40a. He says that my elements are the deciding factor in how much juice is pulled through that 40a contactor. He told me he would call me back and let me know what the amps are for my elements....I never get called back and called him back the next day....he told me the elements draw 16a.......

Now here is my question:

Considering that my shop was almost burned down, because I was sold a 240v 16a AIM kiln with a 15a cord, and that John was so perplexed to why my element melted into my kiln brick, that I should ask him for a refund (full or partial) for the BLATANT mistake that his company made 9 years ago that is costing me over 30% of what my kiln cost new to fix?

Thanks for any input.

Joe :bangHead:

medicatedMELTDOWN
07-23-2006, 02:01 PM
damn sorry to hear about your kiln.......it is amazing the elements never melted earlier than they did..

my AIM also came with the top bricks cracked :bangHead:

I would try to get a refund for at least the new bricks and elements you bought...but in a perfect world they would hook you up with a brand new kiln..you can at least try :D :flasher:


p.s. did you buy a ticket yet? haha :2pirate:

melt
07-24-2006, 01:20 PM
i've got lots to say, unfortunatly none of it nice about john so i'll skip that part. I'll start with the contactor. Its common to use a higher rated relay then you need so it doesn't get too stressed out, the elements determine the draw.

I would recommend you rebuild this yourself. forget about john and AIM. you probably won't get any money out of him and you don't want to use any parts you get from him in your new (rebuilt) annealer. Aim uses very cheap parts. the relays are particulary bad in my experience. do you have a fuse in this? you need one on the main power to the elements, and one on the computer.

"I was perplexed by this, seeing as how the breaker to that wall outlet is 40a, and the wire is 8 guage in the wall, and the outlet is 20a, how a 15a kiln would do this???"
these numbers do not add up. what does your 20 Amp outlet look like? your breaker being too large could be why the outlet got too hot.

Joseph Corcoran
07-24-2006, 08:16 PM
the 40 amp breaker in the box is 2, 20 amp breaks with switch tied together. 1/2 of it gos to the wall outlets I think and other to my kiln outlet which has one horizontal and one vertical female.

I could still plug the kiln into it via a small 4' extension cord made from 20 amp rated cord by an electrician, and was told it was alright by the electrician since the cord coming from my kiln was 15 amp.

I already rebuilt my kiln through brick bought at AIM a couple months ago...but just shipped now... One of them was cracked on the corner...but again why waste time waiting for replacement.

I need to just get a better shop, and some resources/training and start building my own...

:P

melt
07-25-2006, 10:22 AM
the breaker is a problem. what happens if one leg trips and the other is fine? seems like the good side could keep the bad side from turning off causing some really bad situations, like delivering too much juice to the outlet and making it get really hot. regardless you need two seperate breakers for what you are doing.

you can learn alot about basic wiring by going to home depot with some coffee and looking at what they sell and looking at the diagrams they have in the displays. also getting a home wiring book will be a big help. learning about this stuff can be pretty dull but its important if you plan on doing this for awhie.

good luck with this

FredLight
07-26-2006, 08:52 AM
There's (or was?) a guy named John over at Georgie's in Portland. He'd know what to do.

The guy is a whiz with this particular situation. 503-283-1353

Joseph Corcoran
07-27-2006, 03:39 PM
the breaker is a problem. what happens if one leg trips and the other is fine? seems like the good side could keep the bad side from turning off causing some really bad situations, like delivering too much juice to the outlet and making it get really hot. regardless you need two seperate breakers for what you are doing.

you can learn alot about basic wiring by going to home depot with some coffee and looking at what they sell and looking at the diagrams they have in the displays. also getting a home wiring book will be a big help. learning about this stuff can be pretty dull but its important if you plan on doing this for awhie.

good luck with this

Yeah I know I need to know more, but I didn't wire it. hehe

I had a pro electrician put it in, and he saw my kiln and the cord, so I just figured he did it right...kinda like figuring that AIM would put the right cord on my kiln, or the right amount of pins in the small groove design kiln...

At least I have it working again though.