HomeRoast Digest


Topic: Motor to electrify zass (6 msgs / 114 lines)
1) From: petzul
Not really happy with this motor, but it is relatively quiet and strong.
Another thrift store item, an automatic juicer. It has a big reamer 
thing in the center of a bowl, when you push down on the reamer with the 
orange half you are holding in your hand, it goes around and juices the 
orange into the bowl.
Well, the bowl and reamer come off easily, leaving a hex shaft sticking 
out the top of the motor. When you push down on the shaft, it makes a 
switch close, and the shaft spins. Much faster than I can turn the crank 
anyway.
With the coupling mounted on said shaft, and holding the motor upside 
down above the Zass and lightly pushing down, it quickly turns the 
handle and grinds very nicely.
I do not like it because this motor assembly is about the size of a 
large cantalope. Kinda detracts from the portability, but still smaller 
and lighter than my Mazzer Mini, and smaller overall, than an electric 
drill.
PeterZ
On to the next project, here in LHC

2) From: Barry Luterman
One thing you might want to watch out for is if the motor turns too fast it 
will heat the beans. A motor with a low rpm output would be best with a 
Zass. I don't think they are designed to turn much faster than one turns it 
by hand.

3) From: petzul
Thanks Barry, Point well taken.
This is a geared down motor, and I am a wussy zass crank turner.
It takes me minutes to go through a hopper full of beans by hand, when 
others do it in a bit over a minute.
I doubt the motor spins much over 200 RPM, if that even, but I will 
check for heating.
PeterZ
Barry Luterman wrote:
<Snip>

4) From: Alchemist John
 From panel discussions at the SCAA this particular type of heating is from 
a shaft transfer from a hot motor, not the initial speed of the 
grinder.  300-500 is considered "slow" in this application.  Since the 
motor and zass are not directly connected, heat should not be a problem.
At 17:26 5/12/2005 -1000, you wrote:
<Snip>
John Nanci
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/

5) From: Angelo
This is one thing i could never understand. Hopefully, you will be steeping 
these beans in 200F water within 30 seconds from grinding. How "hot" can 
these beans get from being ground at 200 RPM. Surely, not up to 200 F.
I used to have a couple of Bunn commercial grinders which had very fast 
motors. I never noticed any heat coming from my beans...
I think this idea of being careful not to heat  < 60 gr. of beans is urban 
legend and/or an old wives tale.
Ciao,
Angelo
<Snip>

6) From: Justin Marquez
On 5/13/05, Angelo  wrote:
<Snip>
ng
<Snip>
n
<Snip>
 a
<Snip>
I have touched the ground beans right after whirly blade grinding and
they are slightly warm to the touch - maybe slightly warmer than room
temp.  Certainly the bulk temperature isn't anything to worry about. 
What I don't know is the local temp at the point where the beans are
hit and shredded by the blade.  I know that the blade itself isn't hot
after grinding either.  My suspicion is that none of it is warm enough
to worry about.
Safe Journeys and Sweet Music
Justin Marquez (Snyder, TX)http://www.justinandlinda.com


HomeRoast Digest