Any Coffee Roasters here?
I have an old bread machine I haven't used for bread for ages. I took it apart and wired it so the paddle is on all the time and the heater has been removed completely. I also removed the plastic from the lid and replaced the viewing window with aluminum (it was plastic and the heat gets way too high). I stripped the teflon off the pan and drilled a small hole for my Thermocouple probe so I can get the temp of the bean mass at the bottom of the pan.
I set up a box fan blowing out the window and set the roaster right by the fan to try and get most of the fumes outside. I use a heatgun to provide a controlled temp and the bread machine paddle keeps the beans moving for an even roast (attempting to move the beans like a rotating drum does in a professional roaster).
I generally roast 300-400 grams at a time. These are the green coffee beans I'm roasting today. Guatamalan Xinabajul
This is my cooling station. It's a vacuum cleaner sucking air thru a cardboard box with a stainless colander in the box. This sucks air through the hot coffee beans and cools them very efficiently.