[Homeroast] Gotta get me one of these

Steven Van Dyke coffee at svandyke.com
Fri Apr 29 19:16:08 CDT 2016


Interesting.  My thought was that you'd need at least two sets of 
initial rollers to crack the beans but you might need only one more set 
to get them almost right with the final set being the adjustable one.  I 
also worried about how much torque turning all those rollers might need.

------ Original Message ------
From: "John Nanci" <john at chocolatealchemy.com>
To: "A list to discuss home coffee roasting. There are rules for this 
list, available at http://www.sweetmarias.com/maillistinfo.html" 
<homeroast at lists.sweetmariascoffee.com>
Sent: 4/29/2016 7:45:28 AM
Subject: Re: [Homeroast] Gotta get me one of these

>It is nearly exactly what I did.  It was unbelievable how much pressure 
>coffee beans can exert when being ground.  That V would not stay in 
>place.  Too much combined pressure.  Materials bent and bowed.  8, 10 
>and 12 gauge steel I am talking about.  And the motor had to be huge 
>and geared down.  Not to forget, the amount of gearing needed made it 
>very expensive. Sounded great on paper.
>
>On 4/28/2016 5:19 PM, Steven Van Dyke wrote:
>>What about a design using fairly narrow rollers (say, 1.5" wide, maybe 
>>1-2" diameter) arranged along a vertical V track so you can adjust the 
>>spacing between them.  Add a little texture to the roller surfaces to 
>>help pull things through (especially on the first set) and gear it up. 
>>  Part of the question is how much you can change on each step.
>>
>>KCSteve :->
>>
>>------ Original Message ------
>>From: "John Nanci" <john at chocolatealchemy.com>
>>To: "A list to discuss home coffee roasting. There are rules for this 
>>list, available at http://www.sweetmarias.com/maillistinfo.html" 
>><homeroast at lists.sweetmariascoffee.com>
>>Sent: 4/28/2016 11:10:58 AM
>>Subject: Re: [Homeroast] Gotta get me one of these
>>
>>>Yes, that is exactly what they are.  I have heavily researched them 
>>>with the thought of a home mill, but the project was beset by those 
>>>pesky physical laws.  In short, they are huge and expensive.  Making 
>>>one home sized so far isn't feasible due to tight tolerances, 
>>>material demands and price.  A standard 6 roller mill starts around 
>>>$60K.   You might be able to build one for home use, but it would 
>>>probably be $5-10K.
>>>
>>>John
>>>
>>>On 4/28/2016 7:06 AM, Bob Hazen wrote:
>>>>That's interesting.  I've never heard of a roller mill.  I can 
>>>>imagine a
>>>>series of progressively tighter spaced rollers to crush, rather than 
>>>>cut,
>>>>the beans to a uniform size.  I'm guessing the complexity, cost and 
>>>>size
>>>>make them better geared for industrial situations than for 
>>>>homeroast.
>>>>
>>>>Bob
>>>>
>>>>
>>>>-----Original Message-----
>>>>From: Homeroast 
>>>>[mailto:homeroast-bounces at lists.sweetmariascoffee.com] On
>>>>Behalf Of John Nanci
>>>>Sent: Tuesday, April 26, 2016 7:58 AM
>>>>To: A list to discuss home coffee roasting. There are rules for this 
>>>>list,
>>>>available at http://www.sweetmarias.com/maillistinfo.html
>>>>Subject: Re: [Homeroast] Gotta get me one of these
>>>>
>>>>   From the research i have done they are often using roller mills. 
>>>>The
>>>>particle distribution is generally much tighter and very low on 
>>>>fines.
>>>>
>>>>On 4/26/2016 7:40 AM, Bob Hazen wrote:
>>>>>This may sound like heresy, but on those rare occasions when I 
>>>>>succumb
>>>>>to a can of Folgers. . .  Yes, I get lazy once in a while. But the
>>>>>can of Folgers resets my homeroast switch.
>>>>>
>>>>>I digress....
>>>>>
>>>>>It seems commercial canned coffee is devoid of fines.  How can this
>>>>happen?
>>>>>Do they filter out the fines and use the dust in other products?  
>>>>>Or
>>>>>are their grinders so high tech they avoid the cost of excess waste 
>>>>>by
>>>>>producing tightly controlled particles?
>>>>>
>>>>>Bob
>>>>>
>>>>>
>>>>>-----Original Message-----
>>>>>From: Homeroast 
>>>>>[mailto:homeroast-bounces at lists.sweetmariascoffee.com]
>>>>>On Behalf Of John Nanci
>>>>>Sent: Tuesday, April 26, 2016 7:25 AM
>>>>>To: A list to discuss home coffee roasting. There are rules for 
>>>>>this
>>>>>list, available at http://www.sweetmarias.com/maillistinfo.html
>>>>>Subject: Re: [Homeroast] Gotta get me one of these
>>>>>
>>>>>I really want to like this product.  And on the surface, I think I 
>>>>>do.
>>>>>I just don't see myself using it regardless of the improvement it 
>>>>>makes.
>>>>>The waste, even if it is defect waste from the grinder, just keeps 
>>>>>me
>>>>>from embracing it.  That said, it seems a great, affordable, 
>>>>>grinder
>>>>>analysis tool.  Affordable particle analysis basically.
>>>>>
>>>>>On 4/25/2016 2:47 PM, Jeff Bensen wrote:
>>>>>>I have a Rocky and I sift when grinding for either a French Press 
>>>>>>or
>>>>>>Vac Pot. I only have one of those fine strainers from the 
>>>>>>housewares
>>>>>>section, so not as precise as the Rafino. I find it makes a big
>>>>>>difference in taste when doing a coarse grind for the press, and 
>>>>>>is
>>>>>>essential for a successful draw-down in my glass rod Cory and Cona
>>>>>>vac pots.
>>>>>>
>>>>>>I looked at the Indegogo campaign and it appears interesting. I'd
>>>>>>like to hear your experience with it once you get it.
>>>>>>
>>>>>>-- Jeff Bensen
>>>>>>
>>>>>>
>>>>>>>At 09:41 AM 4/25/2016, Mike Koenig wrote:
>>>>>>>There was a discussion on this list a good number of years ago 
>>>>>>>about
>>>>>>>doing exactly that. Someone put a fine sieve on top of a jar and
>>>>>>>shook out the fines. Reported a better tasting cup. Not sure if 
>>>>>>>the
>>>>>>>archives still work to search for it. The Rocky is a solid 
>>>>>>>espresso
>>>>>>>grinder but it's known for producing a bit of fines when trying 
>>>>>>>to
>>>>>>>grind coarser. Sieving will probably be a lot cheaper than a new
>>>>>>>grinder.
>>>>>>>
>>>>>>>--mike Sent from my iPhone
>>>>>>>
>>>>>>>
>>>>>>>>On Apr 25, 2016, at 9:15 AM, Frank Parth wrote:
>>>>>>>>Even though I use a Rocky to grind my morning coffee, I've 
>>>>>>>>always
>>>>>>>>wondered if I could get more consistent size on the grind. I 
>>>>>>>>found
>>>>>>>>this
>>>>>>>>https://www.indiegogo.com/projects/the-rafino-coffee-grind-refining
>>>>>>>>-
>>>>>>>>system/x/3861299#/
>>>>>>>>
>>>>>>>>and decided to order one. It filters the coffee grinds through
>>>>>>>>sieves and is supposed to separate out a consistent size grind.
>>>>>>>>Due in August. I'll let you know how well it works (or even if 
>>>>>>>>it
>>>>>>>>works as advertised).
>>>>>>>>
>>>>>>>>Frank Parth
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>
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