Grant Muller

Coffee Roasting: Build or Buy?

For the last five years I’ve been roasting coffee in this:

I got 5 years out of my old machine, the Frankenstein Turbo Crazy, home grown of course

My Frankenstein Turbo Crazy.

But alas, after five years of operating “outside of normal temperature ranges”, this happened:

Before this happened. Half a decade of operating "outside of normal temperatures" melted the convection heater...

It seems that convection ovens weren’t meant to have their temperature limiters removed and run for hours on end. The handle, which controls the reed switch to turn the heating unit off and on, melted right off the base.

I knew this would happen someday, and I had planned to build another machine with a leaf blower and a commercial heating element, with robot arms and a positron brain. Alas, the unhappy melting happened right in the middle of rebuilding a fence, writing a bunch of software and getting through several releases at the office. I was posed with the classic question all technology households are posed with: build or buy?

A guy has got to have his home-roasted morning brew. I made a rash decision. I ordered one of these:

The Muller House gets a new coffee roaster

A GeneCafe from Sweet Maria’s.

After a week of waiting the GeneCafe finally arrived so after fulfilling my daily obligations I came home and took it for a test run on some Rwanda NKanka Kinyaga. In Benjamin Franklin style, here is how five years of DIY roaster technology stacks up to the commercial grade:

GeneCafe Frankenstein
Pros
  • Configurable Temperature
  • Configurable Time
  • Integrated cooling unit
  • Excellent chaff removal
  • Single unit
  • Easy to clean (so far)
  • Very even roast
  • Requires less monitoring
  • No coasting
  • Extremely high temperatures
  • Infinitely configurable
  • Very low cost
Cons
  • Long coast time
  • Small batch size
  • Long roast/cool times
  • Temperature
  • Very high coast
  • No integrated cooling unit; long cooling times
  • Requires constant monitoring
  • Occasionally uneven roasts
  • Poor chaff removal

The verdict. After the initial two test runs I’ll give the win to the GeneCafe. If only for the sweet analoguish knobs. We’ll see how it holds up after half a decade.

What’s the plan for my beleaguered Frankenstein Turbo Crazy? Well, I’ve always wanted an outdoor water heater…

Update: The coasting issue I complained about previously is no longer a problem. Seems I just needed to read the instructions…

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