[Homeroast] Nesco Roaster 1st time

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Thu Dec 31 13:40:36 CST 2009


I've never used a Nesco home roaster. From your description, it sounds like
it suffers from the same over-temperature problems as the air poppers that
are used for coffee roasting. They work after a fashion, but the simple
excess temperature compensation is to operate them on a long extension cord.

The extension cord drops some voltage, the fan speed drops proportionally
and the heat power drops exponentially, or faster. Leaving the cord coiled
up will introduce an exciting new feature to "home roasting."

Most air roasters don't like to have their fans slowed or the air volume
reduced at all. Cheap poppers have low voltage DC motors operating with
full-wave bridge rectifiers supplied by a ballast resistor and/ or a tap on
the heater coil. Leave the heater alone and speed the motor by connecting an
electrolytic capacitor across the motor terminals.

Balance the capacitor size, the ballast resistor size and the roast batch
size for the motor speed/ blower volume/ temperature you want for roasting.
Everything is interdependent, so decide which of the beans you like, if you
got a sampler, and get Five pounds of it as a pleasant training coffee. Then
you can learn to roast.

It can be a real vexation, but cooling is a big part of coffee roasting.
Forget about chaff removal- it can wait until the beans are cool. With the
beans cooled, there is time to play around with chaff removal before you
"can" the beans for a short- or long- aging nap as the flavors mature. A
matter of hours to days.

All roast levels have their attractive features, if you can actually stop
the roast at any point where the beans are on the verge of Cracking. Even
"over the top," smoking and snapping, some gorgeous flavors exist if you
stop it right there.

"Dark" will always be a four-letter word if Crisis Management describes your
roast control.

Cheers, Mabuhay, Iechyd da -RayO, aka Opa!

Got Grinder?


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