Page
ST325 User Handbook
16
Adjusting While Firing
Firing values can be adjusted while the ST325 is firing. Also there are pro-
gram pause/un-pause and segment advance features that are particulary
useful for glass work.
Adjusting Firing Values
While firing operate the
¨
key to select the required parameter as shown
by a flashing lamp on the mimic display. The firing value is shown on the
main display and can now be adjusted with the
©
&
ª
keys in the usual
way. The contents of the current segment or any segment still to be
executed can be changed. Firing will still carry on as normal while these
changes are being made. The ST325 will return to its normal running
display 10 seconds after key presses cease (or immediately after
End
is
displayed).
Changes made to programs in this way are stored and are used for
subsequent firings.
Segment Advance Facility
While firing press and hold down the green f
n
(function) key then press the
►►
(advance) key. The ST325 will sound a short beep and the executing
program will immediately advance one step as indicated by lamps on the
mimic panel. The effect of this is as follows:-
If a start delay is currently executing then the ST325 will terminate this and
start firing immediately.
If ramping is currently executing then the ST325 will switch to soak at the
current kiln temperature.
If currently soaking then the ST325 will advance to the next segment if any,
or else it will end the firing.
Changes made to the operation of the ST325 in this way are temporary
and are not stored.
Adjusting While Firing
ST325 User Handbook
Page
9
Sample Ceramics Programs
Sample Ceramics Programs
Note
It has been found that a kiln controller will give greater heat work as the temperature
increases. Therefore to achieve a stoneware firing of cone 8-9 we suggest setting
the final soak temperature to 1235°C. A slight adjustment can then be made after
the first firing. It should be remembered that kiln controllers are indicators of
temperature and the effects of faster or slower firings may cause extreme variations
in the end result. This is known within ceramics as “heatwork”. Cones are
measures of heatwork and it is strongly recommended that cones are always used
in conjunction with a kiln controller to appreciate the differences between heatwork
and temperature indicated by the controller. Stoneware firings will also demonstrate
the greatest potential differences between heatwork and indicated temperature.
All of the information on this page was kindly provided by Reg Griggs
of Clayman Supplies Limited (www.claymansupplies.co.uk).
Program Name
Segment 1
Ramp Rate
Segment 1
Soak Temp
Segment 1
Soak Time
Segment 2
Ramp Rate
Segment 2
Soak Temp
Segment 2
Soak Time
Slow Bisque
60°C/hr
600°C
00:00
FULL
1000°C
00:00
Normal Bisque
100°C/hr
600°C
00:00
FULL
1000°C
00:00
High Bisque
100°C/hr
600°C
00:00
FULL
1140°C
00:00
Brush-on
Earthenware Glaze
1000°C (Cone 6)
100°C/hr
300°C
00:00
FULL
1000°C
00:00
Standard
Earthenware Glaze
1100°C
100°C/hr
300°C
00:00
FULL
1100°C
00:00
Earthenware High
Temperature Glaze
1140°C
100°C/hr
300°C
00:00
FULL
1140°C
00:00
Mid-Range
Stoneware Glaze
1200°C
100°C/hr
300°C
00:00
FULL
1200°C
00:00
Standard
Stoneware Glaze
1260°C (see note)
100°C/hr
300°C
00:00
FULL
1235°C
00:00
Onglaze 780°C
100°C/hr
400°C
00:00
FULL
780°C
00:00
Lustre 750°C
100°C/hr
400°C
00:00
FULL
750°C
00:00
Segment 3
Ramp Rate
End
End
End
End
End
End
End
End
End
End
