Table of Contents

Jewelry Kiln

This kiln is working, but has no active users, so we are in the process of learning its idiosyncrasies and making a proper doc.

Tool anatomy

1. Controller 2. Breaker switches 3. Alarm lights 4. Temperature probe 5. Latches 6. Viewing port

To do

4/18 "does it work" test

T value = time until next step

Step Set Temp (˚F) T value Check time Check temp Notes
1 80 15 10:33 75
2 300 15 10:48 295 213˚/15min = ~14˚/min
3 0 -121 11:03 265 it definitely works

4/18 "is there an alarm buzzer" test

Asked the kiln to try to ramp to 2k˚ in 15 minutes. The alarm relays are firing, but no alarm light or buzzer sounds, so we need to get one (or two).

Step Temp (˚F) T value Check time Check temp Notes
1 80 15 step skipped
2 300 15 11:40 300 AL2 light on, no buzzer
3 2000 180 12:00 550 proceeding to “can we get to 2k” test
12:03 600
12:07 661
12:15 766
12:21 839
12:27 896
12:34 958
12:54 1099 AL1 light on, no buzzer
1:25 1250
1:35 1284
1:47 1331
2:09 1386
2:11 1400
2:32 1454
2:51 1492
3:45 ~1570 hovering around here, jumping rapidly up and down. the area around the kiln is warm. this is about the functional limit of this configuration.
4 80 -121

Forge curing schedule

There's a forge which has been lined but needs to be heat-cured.

Step Temp (˚F) T value Notes
1 100 60 ramping up 100˚/hr
2 200 60
3 300 60
4 400 60
5 500 60
6 600 60
7 700 60
8 800 60
9 900 60
10 1000 60
11 1100 60
12 1200 30 holding for 1/2 hour for 1/2“ of material
13 80 -121 stop

The official kast-o-lite packet says to ramp down 100˚ per hour, but people online seem to skip this step.

misc notes