HomeRoast Digest


Topic: 110-220 volts? (12 msgs / 320 lines)
1) From: Doug Hoople
Hi All, 
New to the list, so don't know whether I'm pushing all the right buttons, but here goes... 
I've been home-roasting for about 6 months and live in Berkeley, just over from Sweet Maria's in West Oakland. I had the good fortune to attend one of the experimental cupping classes in West Oakland, which was great. 
I've really enjoyed roasting at home, something I had wanted to do for decades (literally), but only got around to once I discovered Sweet Maria's. So my thanks to those good folks, and my greetings to the denizens of this list (all my friends thought I was a coffee geek... wow, what they don't know!). 
At any rate, here's the question... 
I currently have an iRoast2, which is great, but it won't last forever, and I'll want to roast bigger batches, too. Home roasting has taken me from being the brink of giving up coffee (to improve my health) to drinking MUCH more of the stuff. 
So I'll be looking to upgrade to something that roasts in 1/2 lb or 1 lb batches. 
But the really big thing I'm looking for is the ability to run on 220 volts, either in addition to 110, or exclusively 220. I'm emigrating to New Zealand in November, and can't afford to buy a 110-only roaster that I'll use for less than a year. 
Any ideas? 
Thanks.
Doug
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2) From: Doug Hoople
Hi All, 
Thanks for the many responses. Amazing feedback for my first attempt in this list. It performs totatlly as advertised! 
I'm generally very wary of using a transformer, especially on motor-driven devices that I plan for relatively heavy non-intermittent use. I was intrigued, though, by the half-wave rectifier suggestion, and will look into that for general interest. 
I was pleased to find that home roasting machines are being targeted at 220v markets, and so it won't be a problem finding one that will run 220v native. 
I saw the Steve Leighton video blogs, and ran through a bunch of them. The little blurb he does on the Behmor is on the video where the 1600 appears on the left for the first time, sometime in early December, I think. 
Did anyone notice that one of his all-time favorite coffees is (or at least appears to be) one that SM carried? I actually happen to have a small stash left of the Brazil Cachoeira Canario that came with my SM order from last September. Apparently from the same farm in Minas Gerais run by a guy named Gabriel. My interest is piqued, and I'll be roasting it this afternoon. 
I also contacted Behmor about their 220v 1600, and just got a nice email back from Joe Behm saying that he still hasn't released the 200v 1600 to the market yet (Steve Leighton's promotional model notwithstanding), but that he expects it to start shipping April-ish, which is fine according to my schedule. 
Thanks, all, for making this first dip into the list pool extraordinarily rewarding. I'm afraid a new Internet addiction has come to compound my coffee addiction (which I had totally under control until I stumbled upon SM last June)! 
Happy cupping! 
Doug
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3) From: Benjamin VerHage
I'm pretty sure the HotTop is available in 220V, and I've heard rumors that=
 the Behmor is coming out with a 220V version. Not sure where you can/w=
ill be able to get them though.
Ben
From: Doug Hoople 
To: homeroast
Sent: Monday, January 5, 2009 4:17:56 PM
Subject: [Homeroast] 110-220 volts?
Hi All, =
New to the list, so don't know whether I'm pushing all the right buttons, b=
ut here goes... =
I've been home-roasting for about 6 months and live in Berkeley, just over =
from Sweet Maria's in West Oakland. I had the good fortune to attend one of=
 the experimental cupping classes in West Oakland, which was great. =
I've really enjoyed roasting at home, something I had wanted to do for deca=
des (literally), but only got around to once I discovered Sweet Maria's. So=
 my thanks to those good folks, and my greetings to the denizens of this li=
st (all my friends thought I was a coffee geek... wow, what they don't know=
!). =
At any rate, here's the question... =
I currently have an iRoast2, which is great, but it won't last forever, and=
 I'll want to roast bigger batches, too. Home roasting has taken me from be=
ing the brink of giving up coffee (to improve my health) to drinking MUCH m=
ore of the stuff. =
So I'll be looking to upgrade to something that roasts in 1/2 lb or 1 lb ba=
tches. =
But the really big thing I'm looking for is the ability to run on 220 volts=
, either in addition to 110, or exclusively 220. I'm emigrating to New Zeal=
and in November, and can't afford to buy a 110-only roaster that I'll use f=
or less than a year. =
Any ideas? =
Thanks.
Doug =
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      =
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4) From: Rich
A transformer would be the low cost approach.
Doug Hoople wrote:
<Snip>
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5) From: Bruce Thompson
Be careful with transformers though.
I'm in India for a year and missing my GeneCafe horribly! Even though  
we've got two fairly hefty transformers, I didn't want to risk the GC.
The issue? The difference in frequency. US/Canada/Japan run 110/120 at  
60Hz. Most of the rest of the world runs 220/240 at 50Hz. The  
difference between 60 and 50 Hz can be substantial for anything that  
has a motor running off AC. AC motors run in sync with the frequency  
of their power. What this means for us is that an AC motor designed  
for 60Hz will run approx. 17% slower when powered by 50 Hz AC. While  
this may not be an issue for some motors, it can be bad for motors  
that are under a fair amount of load because the torque is also  
reduced (not sure if the percentage stays the same...) so the motor  
will tend to wear out sooner than it should.
This is not an issue for DC motors since the issue of frequency  
differences is irrelevant with DC power. That's why the cooling fans  
in your computer won't care whether you are feeding 50Hz or 60Hz AC to  
the power supply (assuming the power supply can handle 220 that is...)
When planning our move, we decided that risking the GC wasn't worth  
it, we'd risk the bread maker since it's old enough that if it dies  
while here it isn't a tragedy. I ultimately chickened out with the  
Maestro since we're having a heckuva time finding decent whole beans  
anyway.
Besides, isn't India the land of Tea? (HERESY! I know... :-) ).
Cheers,
Bruce.
On Jan 6, 2009, at 6:51 AM, Rich wrote:
<Snip>
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6) From: Bruce Thompson
Be careful with transformers though.
I'm in India for a year and missing my GeneCafe horribly! Even though  
we've got two fairly hefty transformers, I didn't want to risk the GC.
The issue? The difference in frequency. US/Canada/Japan run 110/120 at  
60Hz. Most of the rest of the world runs 220/240 at 50Hz. The  
difference between 60 and 50 Hz can be substantial for anything that  
has a motor running off AC. AC motors run in sync with the frequency  
of their power. What this means for us is that an AC motor designed  
for 60Hz will run approx. 17% slower when powered by 50 Hz AC. While  
this may not be an issue for some motors, it can be bad for motors  
that are under a fair amount of load because the torque is also  
reduced (not sure if the percentage stays the same...) so the motor  
will tend to wear out sooner than it should.
This is not an issue for DC motors since the issue of frequency  
differences is irrelevant with DC power. That's why the cooling fans  
in your computer won't care whether you are feeding 50Hz or 60Hz AC to  
the power supply (assuming the power supply can handle 220 that is...)
When planning our move, we decided that risking the GC wasn't worth  
it, we'd risk the bread maker since it's old enough that if it dies  
while here it isn't a tragedy. I ultimately chickened out with the  
Maestro since we're having a heckuva time finding decent whole beans  
anyway.
Besides, isn't India the land of Tea? (HERESY! I know... :-) ).
Cheers,
Bruce.
On Jan 6, 2009, at 6:51 AM, Rich wrote:
<Snip>
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7) From: raymanowen
"A transformer would be the low cost approach."
I disagree. It could be the worst solution. It invites reckless operation
and deliberate overloading. The transformer has to handle the entire "110
volt" load- nearly 2,000 watts in the case of small roasters.
A 220v:110v transformer can do exactly two things: Step Down 220v to 110v,
or Step Up 110v to 220v. And it weighs like Hell, no matter what it's doing-
the iron and copper of it all.
If the roaster has a 220v model, it is likely that the heater is composed of
a 220v element with a center tap. The high (220v) would be applied to the
ends of the element, while the low voltage (110v) would be applied to the
center tap for one power leg, and the two ends for the other leg.
Much simpler and cheaper would be the following: 220vrms through a half wave
rectifier = 110vrms. Very Small, very Light and very Cheap.
Transformers are an execrable solution for power step down.
Cheers, RayO, aka Opa!
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976
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8) From: james McDougal
Hi Doug,
There is a new 220V version of the Behmor - it is green! I've seen it
discussed on "in my mug video blog" from the Has Bean website.http://www.inmymug.com/Mac
On Mon, Jan 5, 2009 at 7:17 PM, Doug Hoople wrote:
<Snip>
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9) From: Alchemist John
I do know the concern over frequency is very important on the 
Behmor.  I had one out of country customer go through two units 
before we determined the 50 hz was killing the electronics.
Mac, says the video is gone.  Do you mean it is literally green in color?
At 04:38 AM 1/6/2009, you wrote:
<Snip>
John Nanci
AlChemist at large
Zen Roasting , Hand Grinding, Blending & Espresso pulling by Gestalthttp://www.chocolatealchemy.com/Homeroast mailing list
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10) From: james McDougal
Yes John, green in color. Steve Leighton, the guy who does the video blog,
talked about it maybe 6 weeks ago - he had just had a visit from Joe Behm
who brought it to him.
In the video blogs, you can see the green behmor in the left hand corner of
several of the recent blogs. I don't know why it says the videos are gone,
but if you click on one of the ones on the right they run. The Behmor is
mentioned in episode 9, I think.
Mac
On Tue, Jan 6, 2009 at 8:14 AM, Alchemist John wrote:
<Snip>
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11) From: Bonnie Polkinghorn
Thank you for the link, Mac, I'll enjoy following this video blog.
-Bonnie
On Tue, Jan 6, 2009 at 4:38 AM, james McDougal wrote:
<Snip>
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12) From: james McDougal
Bonnie,
I'm sure you will - he's an interesting and enthusiastic character who's
really into coffee!
Mac
On Tue, Jan 6, 2009 at 11:50 AM, Bonnie Polkinghorn <
bonnie.polkinghorn> wrote:
<Snip>
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