I have named my drum roaster Andy.
About 3 weeks ago, the 6 rpm motor on my KISS Zen II
(www.chocolatealchemy.com/zenii.php) roaster died. I had order a
replacement motor some time ago, so it was time to replace it. The
new motor is 42 rpms. Major difference.
Well, I wanted to report on a few major differences in the new
roaster. First off, I "knew" that a faster rotation speed would
decrease my roast time given other factors remaining the same. But
holy-mother-of-Deityofyourchoice :O. A 12 oz roast normally
progresses nicely at a given power for 1st at around 10 minutes, 2nd
at around 14-15. This time, with pulling the power back (knowing I
would need too) I hit first at about 6-7 minutes and had to fight
like the devil to make it to 9 minutes before 2nd.
He is suddenly turbo charged. So, why is this? Can anyone give a
concrete explanation? I assume there is something about forced
convections, but that is where I get stumped. Agitation was fine
before. Or is it just empirical - increase speed, decrease power requirement?
Also, as it shows in the picture, I roast in a wire drum. At 6 rpm,
I had beans get stuck. At 42 rpm they are moving too fast to get
stuck. Another great benefit.
I am going to go try 20 oz this morning and see how it behaves. That
was my previous limit for a good roast.
Oh, and the name Andy. We have a short stocky "keg-on-leg" dog by
that name. 60 lbs but only up to my knees. He is a little
Juggernaut and chuffs when he gets "going". chf-chf-chf-chf. So
does my new drum when it has beans in it. :)
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/