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High Bridge Pottery

Member Since 19 Feb 2013
Offline Last Active Yesterday, 07:16 PM
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Topics I've Started

Kiln Coating

08 July 2014 - 08:57 AM

I have been reading a bit of my new kiln book and it says "it is recommended that all surfaces coming into contact with the Kanthal element be coated with alumina or a high-quality refractory cement"

 

Could I mix up the kiln cement I have into a thin wash and sponge it into the element grooves. Would it be any better if I mixed it with some kiln wash? There is still tiny bits of glaze in the grooves, would it be a bad idea to coat over this? I would like to cover over all the tiny bits I couldn't remove from the brick.

 

I would like to give these elements the best start in life  :D without paying for anything more  :(


Ceramics 3D Printer

30 June 2014 - 06:07 PM

I have seen ceramics printers where they use powder but nothing like this before. I thought it was worth sharing.

 


Building A Top Loader Kiln Lid.

26 June 2014 - 08:31 AM

So.... My kiln is slowly being mended. I have the new elements being made up and some K26 bricks ordered.

 

The problem with the original lid was that it really has no support in the middle of the lid which then had a peep hole in the middle-ish brick causing structural issues. The lid was bricked up in the standard brick wall config (sorry I don't know the correct term) but I am wondering if there is a better way to lay the bricks. The old lid was in the end held together by the tension of the steel case round the bricks.

 

This was my idea from looking at pictures of kiln lids for the brick config.

Attached File  photo.JPG   86.31KB   8 downloads

 

I would have two stainless steel threaded bar going through and being bolted onto the steel casing (shown by the dotted line) This I hope will add enough support to the middle and with the peep hole being on the edge of two bricks instead of one it would negate the structural issues the old lid had with a hole in the middle of one brick.

 

Could I also pin the bricks to each other with small bits of element or would that make cementing the bricks straight too hard to get right?

 

Any advice on cementing the bricks as I have never done it before?

 

 


My Elements Do Not Add Up.

29 May 2014 - 10:11 AM

Disclaimer - I have no official wiring diagram so please don't ask  :(

 

One of the elements has gone on my kiln but I have decided to replace them all as the others are very much on their way out.

 

I took readings of the amps and resistance of the elements. The top circuit has 6 elements that was drawing 18.5A and the bottom with 4 elements drawing 15.5A. This was a little confusing as I was told by the electrician that a 30A fuse had been installed.

 

The resistance is shown in the picture. When I do the maths the amps comes out as 44.7 with the readings that I took for the resistance. Were my resistance readings just very badly taken as the elements are old?

 

The total resistance should be 240/30 = 8 Ohm or even with the 34amp reading it should be 7.06 Ohm

 

Right? 

So why do I get a value of 5.37 Ohm  :angry:

 

Attached File  IMG_5296.JPG   38.79KB   2 downloads

 

Do elements go up in resistance as they age? The only way I can get a resistance reading near what I should have is by having the top circuit having 16 Ohm and the bottom having 15 Ohm which gives me a total resistance of 7.74 Ohm.


Personal Pottery Video

14 May 2014 - 09:10 PM

I would like your opinion on my first try at making a video. It wasn't meant to be exactly like this but the camera recorded in the wrong resolution so I went for an older aesthetic to try and not waste all the footage...

 

So, what do you think?