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Cones PowerPoint Presentation

Cones

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Cones

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Presentation Transcript

  1. Cones • Time & Temperature • Permanent record of each firing • Inexpensive 10¢ per cone • Troubleshooting aid • Use a Cone Template for accuracy • Best way to detect a decalibrating Thermocouple

  2. Loading the kiln • Shelves • Size - 2” less than kiln diameter • Clearance • Shelves 1” from walls • Shelves 2” from Thermocouple • Ware 2” from walls • Location • First shelf 1” up from floor

  3. Loading, continued • Density of load • Hot & Cold spots • Uniformity • Tall items toward the center • Allow space for air flow • Stagger ½ shelves if possible

  4. Cooling and Unloading • Run the downdraft vent system • Force cooling with a fan • Lid closed, peep plugs are in • Small fan blowing at controller • Wind velocity •  air exchange around kiln •  cooling time • Unload safely at (or below) 125°F

  5. Preventive Maintenance • Electrical items • Thermocouples • Relays • Elements • Mechanical items • Lid brace & hinge • Section Handles • Brickwork

  6. Maintenance, electrical • Opening Electrical Box • Unplug Kiln or • Disconnect power • Phillips screwdriver • Remove all screws on Left side of box

  7. Maintenance, electrical • Thermocouple Replacement • Unplug Kiln • Open Box • Unscrew Porcelain Block • Loosen Screws and Remove Thermocouple • Install in Reverse Order

  8. Maintenance, mechanical • Lid Brace & Hinge • Anchor pads • Lid • Body

  9. Maintenance, mechanical • Lid Hinge • Screws • Cotter pin • Struts • Other hardware • Handles • Latches

  10. Maintenance, mechanical • Temporary Brick Repair • Unplug Kiln • Insert pins at 30 degree angle to form a ledge • Space pins every ¾ inch

  11. Repairs • Relays • Unplug Kiln • Remove Box • Remove Baffle • Label and Remove Relay Control Wiring • Unscrew and Remove Relay • Install in Reverse Order

  12. Repairs • Element Replacement • Unplug Kiln • Open Control Box • Cut Element Close To Connector • Remove Pins • Carefully Remove Element • Insert New Element • Crimp On Feeder Wire With Barrel Connector • Close and Fasten Box • Use Factory Original Parts

  13. Locate receptacle Use insulated probes Insert at slight angle Checking Voltage