Kiln Controller
To Do
- Temperature sensor volatility remains a problem, rendering the PID D term unusable.
- Implement a better smoothing function. Consider forward weighted moving average over significantly more than 10 terms.
- Look at the run from 2024-09-03 to find out the period of the high temperature swings.
- Look at the data from 2024-09-04 to find the noisiness at low temperature.
Notes
rsync -avz kiln-controller/ pi-kiln:./kiln-controller/ --exclude '*/profiles/*' --exclude '*__pycache__*'
- Kiln Controller: https://digitalfire.com/url/3306
- Thermocouple Amplifier: https://learn.adafruit.com/adafruit-max31856-thermocouple-amplifier/pinouts
- Testing: https://learn.adafruit.com/adafruit-max31856-thermocouple-amplifier/wiring-and-test
- Pi 31856; soft SPI failed, hard SPI succeeded: https://forums.adafruit.com/viewtopic.php?t=112301
- Watchdog Timer: https://pimylifeup.com/raspberry-pi-watchdog/
- Kiln Controller 2: https://www.instructables.com/Build-a-Web-Enabled-High-Temperature-Kiln-Controll/
- 5 Years Since Update: https://github.com/botheredbybees/kilnController
- Game Icon Mugs: https://www.etsy.com/shop/Dwarvesong
- Firing
- Kiln Coil Installation
- Tactile HID
- I2C Quad Buttons: https://www.adafruit.com/product/4980
- I2C Quad Encoder: https://www.adafruit.com/product/5752
- Cherry MX Keycaps: https://www.amazon.com/dp/B0D4LZQL6H
Run 1
- Thermocouple response is very laggy.
- Clock doesn't run when temperature is outside range.
- Laggy thermocouple means temperature overshoots.
- Rate throttle is aggressive, but necessary given laggy thermocouple.
- Temperature reading may be a bit on the low side (actual is 5 - 10f higher), though tough to say because of lag.
