18
Description of Steps
When the firing is complete, the display will read
CPLT alternately with the current temperature of
the kiln, the time it took to complete the program,
and the cost of the firing if you have activated this
feature. To clear this data and return to Idle Mode,
press ENTER.
Cone Fire
The Cone Fire Mode runs a factory installed multi-
segment program which is selected based on the
Cone Value, Speed, and Hold time you choose. To the right is an example of a program which is run
if you choose a Cone Value of 04, a Speed of Medium and Hold time of 5 minutes.
One of the greatest features of Cone Fire Mode is Cone Correlation. It automatically measures the
rate of firing during the last hour of the heating program and adjusts the final temperature based on
the observed firing rate. This will insure consistent results as the kiln elements become weaker with
normal wear from repeated firing. As a result, the shutoff temperature may vary between firings.
Preheat
Preheat is used to preheat the ware inside of the kiln before the temperature goes above the point
when water turns to vapor. If residual water in the clay escapes as vapor too fast, it can crack the ware
or in extreme cases cause it to explode. Large, thick walled, pieces are more susceptible to damage
caused by residual moisture.
When a Preheat time is entered and the program is started, the kiln will climb in temperature at a rate
of 60˚F (33˚C) per hour until it reaches 180˚F (82 ˚C). It will then hold at that temperature for as long
as the time entered. After the hold is complete, it will begin the Cone Fire program. If you do not
wish to preheat your ware, enter 00.00 for the hold time. For instructions on turning this feature off,
consult the Menu section of this manual.
Cone Value
Every clay and glaze should have a Cone Value associated with it. A Cone Value is a measurement
of the Heatwork needed for the clay or glaze to mature. The Heatwork is measured through the
use of Pyrometric Cones (see pg 43.) The values of these cones used by the KilnMaster controller
ranges from Cone 022 through Cone 10. It will not let you enter a cone value outside of this range.
Remember that there is a big difference between values with “0”s in front of them and ones
without “0”s. Example: A Cone Value of “6” is much hotter than a cone value of “06”.
Speed
The Firing Speed you select will determine how long the kiln will take to heat up. This is important
because if you heat some pieces too quickly, they
can crack or explode. There are three available
speeds to choose from. Below is a description of
each speed along with a graph showing the firing
profile.
Cone Fire – Slow
Slow Speed will take approximately 12.5 hours
to complete. Slow Speed is recommended for
Programming
Segs
Rate
Temp
Hold
1
200 ºF/HR
250 ºF
0
2
400 ºF/HR
1000 ºF
0
3
180 ºF/HR
1150 ºF
0
4
300 ºF/HR
1695 ºF
0
5
120 ºF/HR
1945 ºF
00.05
2000
1800
1600
1400
1200
1000
800
600
400
200
0
0
2
4
6
8
10
12
Temperature (∞F)
Hours
250∞
1000∞
1300∞
1685∞
1938∞
Cone 04, Slow Speed
