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jrgpots

Member Since 15 Mar 2013
Offline Last Active Yesterday, 11:54 PM
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Posts I've Made

In Topic: Stacking Help For Reduction Gas Firing

15 September 2014 - 10:29 PM

Marcia, the kiln is a bit backwards. The burners are horizontal on either side of the exit flue. The flames hit the back of the kiln where they are deflected upwards. I stacked 2" posts with 1/4 airspace between posts acting as a bag wall for the first shelf.

The flame was forceful and not licking. I neeed to turn down the air I guess and let the kiln heat up more slowly.

The drawing is the same orientation as the kiln. I am sure it will cause lots of questions.

Jed

In Topic: Stacking Help For Reduction Gas Firing

15 September 2014 - 06:43 PM

It ran hot on the bottom and cold on top. It looks like most of the heat and flames, found their way back to the flue after the first shelf. One piece had the glaze blown off one side where the flame path was highest. You said that if the kiln is designed well, stacking would not matter. That might be a very true commentary on my coversion kiln design.....it is very finicky, tempermental, and uneven....

I think I need to close the damper more too.

Why is a short shelf a bad idea on the bottom?

Jed

In Topic: Oxymeter Reading During Reduction

11 September 2014 - 07:05 PM

I think you'll have to log these values and use them for comparative purposes in future firings. It is clear from your observation that you are in reduction. Record the value when you take it out of reduction, and again the value if you try to lightly reduce. When you get glaze results you can adjust the next firings. Say you don't have enough reduction (copper reds not reducing) make adjustments in your next firing and keep track of readouts. Soon you'll know what values to aim for in order to replicate results, at least as best you can.
What are you using as an oxygen probe.? I think what you are trying is pretty cool.


I used an $19 02 sensor from an auto parts store. It really seems to work.

Jed

In Topic: Well Taken Care Of Alpinehf24 Updraft

09 September 2014 - 11:09 PM

sounds like you nailed it, I am going to try and find an old 1027 to do for kicks and hopefully start learning how to do more than hit the start button on a pre-programmed electric. U going to keep an eye out for an old Alpine or do you have other ideas now?

 
The day I began pushing start on a pre-programmed electric was one of the best days of my life! :D

It that kind of like the two happiest days of a man's life?...... The day he bought his first boat and the day he sells his last boat?

Jed

In Topic: Well Taken Care Of Alpinehf24 Updraft

09 September 2014 - 04:39 PM

I always keep my eyes open for "stuff." 

 

jed