[Homeroast] Gotta get me one of these

John Nanci john at chocolatealchemy.com
Fri Apr 29 20:17:52 CDT 2016


Testing indicated at least three sets were needed.  And huge torque.  
Once it hit 'not feasible' or worthwhile I stopped.

On 4/29/2016 5:16 PM, Steven Van Dyke wrote:
> 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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