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Kilns 101

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Mike Sievers

on 27 October 2014

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Transcript of Kilns 101

Kiln Room Design
Check List
Loading The Kiln
Programming The Kiln
During and After the Firing
Kilns 101
Presented By
We help people make great things!
18” Clearance
Room Temperature
Receptacle Location
Sprinkler Location
and Ratings
Access and Racking
Kiln Room Design
Why Do We Vent
Room Venting vs
Kiln Venting
Downdraft Venting
Brighter Colors
Better Bisque
Better For Your Kiln
Better Heat Distribution
Make sure cord is not touching the kiln
Check for flammable material around the kiln
Pre-Firing Checklist
Make sure downdraft vent and room vent are on.
Make sure peep plugs are in and lid is closed securelyIf you don’t have a DownDraft vent
leave top peep plug out during entire
firing and prop lid up to 1000 degrees.

Plan on being there when the kiln is
scheduled to turn off.
Loading the Kiln
Inspect shelves
Use stilts if needed
Stagger Shelves
Let pieces "See the Heat"
Distribute Mass
Use Cones
Make sure greenware is dry
1” From Slab
2” From Lid
1” From Side
2” From Thermocouple
What is a program
Why do we use them
ConeFire vs Ramp Hold
Entering a
ConeFire Program
Entering A
Ramp Hold Program
Advanced Features
Physical water (steam, 212°F)
Chemically combined water (940-1130°F)
Quartz Inversion (1058°F)
Carbon burnout (1200 - 1400°F)
Cone correlation (w/i 100°F of final Temp.)
Preset Programs Designed by Ceramic Engineers
User Calculated Cone Correlation
Write Your Own Program
Cone Correlation
3 Temperature Rate Settings
Enter Exact Temperature Rates
For General Use
For Custom Projects
Controlled Cooling
No Controlled Cooling
Ceramics Only
Ceramics, Glass, PMC, Metal...
Cone Fire
Ramp and Hold
Max Temp
Double Key Press
Cone Correlation
Advanced Features
2 Key Start
Max Temp
Cone Correlation

Plan on being there when the kiln is
scheduled to turn off.

Unload the kiln at or below 125 degrees.

Inspect Cones and take notes.
After the Firing
Look For Loose or Rusted Screws.
Inspect Lid Brace and make sure it is secure before releasing the lid
Inspect Hardware
Check plug and receptacle for signs of damage, such as discoloration our loose prongs.
Inspect Plug
Tighten Bands
Hold worm screw assembly with pliers while you tighten the bands.
Vacuum the kiln every 20 to 30 firings.
Careful not to touch the vacuum hose to the thermocouple
Drift towards over-fire so check your witness cones.
Replace bent, cracked or heavily scaled thermocouples
Some discoloration and scaling is normal
Vacuum Element Grooves
Inspect Thermocouples
Three Types
MI Cable
8 Gauge
Type S
Increase in Resistance as they age.
Resistance Measured In Ohms
Firing Time Increases Gradually Elements Age
5% Going – 10% Gone
Inspect Elements
MODEL VOLT PHASE #1 #2 #3 #4 #5 #6
KM1227 240 1 13.6 13.6 16.3 16.3 13.6 13.6
Replace Brick When You Replace Elements
Wall Bricks Are Not Cemented Together
Temporary Brick Repair
Unplug Kiln
Insert pins at 30 degree angle to form a ledge
Space pins every ¾ inch
You can patch slabs but generally not lids.
Replace Thermocouple
Replace Elements
Replace Brick
Cool = Still Wet
Replace Relays
Full transcript