Ed Bourgeois built one of the finest home roasters I’ve ever seen. Here is a list of his requirements:
1kg.+ electric roaster My goal was a roaster that could do at least 1kg green. with electric convection heat. I mainly wanted the abilities to:
- control and monitor every function
- remove the chaff as produced into an external container
- create a fluidbed action with the beans but achieved mechanically rather than with heated air.
- dump and cool in a minute or less
- must roast very evenly
- ability to add conduction heat when desired
- ability to imitate various roasters
- built with durable and dependable components
- safe to use
And here’s how he did it:
- A) Variable speed convection fan 0-5600rpm
- B) High/Low range convection fan toggle
- C) Main heater On/Off toggle
- D) Beanbats speed control
- E) Chaff canister
- F) Roasting pot
- G) Boost heater control
- H) Main heater and fan
- I) Tilt dump
- J) Bean temp. thermocouple
- K) Air temp.
- L) Volt/Watt digital display “Kill A Watt” meter
- M) Variac 0-140v for main heater
- N) Timer
- O) PID
- P) Cooling drawer- removable cooling tray
- Q) Base with Beanbat speed control gearhead motor 0-330rpm
- R) Dumping handle in back
Read more about it here.
8 thoughts on “How to build a coffee roaster from scratch”
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1. Buy a hot air popcorn popper off eBay.
2. Roast coffee
Lather, rinse, repeat
Serves 6
Hi Huhwhat?,
I disagree. This would be overengineered if you were looking to roast a few ounces of coffee every few days, but you burn out those air poppers quickly trying to do more than a batch or two a day. Ed engineered his roaster to do 2 lbs. at a time without straining the system. He’s also going for repeatability in the roast profile, and a few other things that are beyond the air popper’s abilities. Don’t get me wrong, I like simple easy setups, like the air popper. I roast 8 oz. batches in a Whirley Pop over a grill side burner, but this guy’s in a different league.
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