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Old 01-31-2013, 10:28 PM   #1
frowhite
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Default Grain Mill Survey

I am a mechanical engineering student and for a project my group wanted to design a better grain mill for home brewing. To start this project we are trying to get an idea of the new features that people would want.

What I am asking for is any feedback that you feel would be helpful.

According to forum rules its my understanding that I can't link an external forum, but if you would be willing to answer some questions in this thread I would greatly appreciate it.

Thank you for your help
(PS: If i am violating any forum rules please let me know and I will remove this post)


University of New Mexico Mechanical Engineering Design V Project
Grain Milling survey


1. How experienced are you in brewing
a. Novice
b. Intermediate
c. Advanced

2. Do you currently mill your own grain for brewing?
a. No
b. Sometimes
c. Often

3. How important is automation (non-hand crank) in grain milling?
a. Not important
b. Somewhat important
c. Important

4. Would you be interested in a combination grain mill and digital scale (even at a higher cost)?
a. No
b. Maybe
c. Yes

5. For an automated mill, how much time would you expect to process 10 lbs of grain?
a. Within 10 minutes
b. Within 1/2 hour
c. Greater than an Hour

6. For an automated mill, how important is an adjustable crush feature for different types of grain?
a. Not important
b. Somewhat important
c. Important

7. For an automated mill, how important is out of the box (no/very little assembly, modification or additional required parts) operation?
a. Not important
b. Somewhat important
c. Important

8. How important is achieving proper crush?
a. Not important
b. Somewhat important
c. Important

9. For an automated mill, how much would you be willing to spend?
a. $100-$300
b. $301-$500
c. $501-$700

10. What size hopper would satisfy your home brewing needs?
a. Less than or around 12 pounds
b. Between 12 and 15 pounds
c. Larger than 15 pounds

11. How important are interchangeable sized hoppers?
a. Not important
b. Somewhat important
c. Important

12. For an automated mill, how important is portability/ weight/ storage space?
a. Not important
b. Somewhat important
c. Important

13. Please add any comments to help us determine a better design for a home grain mill.



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Old 01-31-2013, 10:45 PM   #2
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1.C
2. Always
3.C (mine came with hand crank I hook a drill to it)
4.B
5. Less than 10 Min
6.B
7.A
8.B
9.B ( for that much should come with stand )
10. D ( mine holds 30#)
11.A
12.B
13.



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Old 01-31-2013, 10:50 PM   #3
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1. How experienced are you in brewing
a. Novice
b. Intermediate
c. Advanced

2. Do you currently mill your own grain for brewing?
a. No
b. Sometimes
c. Often

3. How important is automation (non-hand crank) in grain milling?
a. Not important
b. Somewhat important
c. Important

4. Would you be interested in a combination grain mill and digital scale (even at a higher cost)?
a. No
b. Maybe
c. Yes

5. For an automated mill, how much time would you expect to process 10 lbs of grain?
a. Within 10 minutes
b. Within 1/2 hour
c. Greater than an Hour

6. For an automated mill, how important is an adjustable crush feature for different types of grain?
a. Not important
b. Somewhat important
[B]c. Important[B]

7. For an automated mill, how important is out of the box (no/very little assembly, modification or additional required parts) operation?
a. Not important
b. Somewhat important
c. Important

8. How important is achieving proper crush?
a. Not important
b. Somewhat important
c. Important

9. For an automated mill, how much would you be willing to spend?
a. $100-$300
b. $301-$500
c. $501-$700

10. What size hopper would satisfy your home brewing needs?
a. Less than or around 12 pounds
b. Between 12 and 15 pounds
c. Larger than 15 pounds

11. How important are interchangeable sized hoppers?
a. Not important
b. Somewhat important
c. Important

12. For an automated mill, how important is portability/ weight/ storage space?
a. Not important
b. Somewhat important
c. Important

13. Please add any comments to help us determine a better design for a home grain mill.

I prefer stainless steel and would like parts to be replaceable or upgradeable as $ allows.

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Old 01-31-2013, 10:59 PM   #4
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Quote:
Originally Posted by frowhite View Post
....
Thank you for your help
(
University of New Mexico Mechanical Engineering Design V Project
Grain Milling survey


1. How experienced are you in brewing
a. Novice
b. Intermediate
c. Advanced

2. Do you currently mill your own grain for brewing?
a. No
b. Sometimes
c. Often

3. How important is automation (non-hand crank) in grain milling?
a. Not important
b. Somewhat important
c. Important

4. Would you be interested in a combination grain mill and digital scale (even at a higher cost)?
a. No
b. Maybe
c. Yes

5. For an automated mill, how much time would you expect to process 10 lbs of grain?
a. Within 10 minutes
b. Within 1/2 hour
c. Greater than an Hour

6. For an automated mill, how important is an adjustable crush feature for different types of grain?
a. Not important
b. Somewhat important
c. Important

7. For an automated mill, how important is out of the box (no/very little assembly, modification or additional required parts) operation?
a. Not important
b. Somewhat important
c. Important

8. How important is achieving proper crush?
a. Not important
b. Somewhat important
c. Important

9. For an automated mill, how much would you be willing to spend?
a. $100-$300
b. $301-$500
c. $501-$700

10. What size hopper would satisfy your home brewing needs?
a. Less than or around 12 pounds
b. Between 12 and 15 pounds
c. Larger than 15 pounds

11. How important are interchangeable sized hoppers?
a. Not important
b. Somewhat important
c. Important

12. For an automated mill, how important is portability/ weight/ storage space?
a. Not important
b. Somewhat important
c. Important

13. Please add any comments to help us determine a better design for a home grain mill.
...
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Old 01-31-2013, 11:59 PM   #5
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1. b. Intermediate
2. c. Often
3. c. Important
4. a. No
5. a. Within 10 minutes
6. c. Important
7. a. Not important
8. c. Important
9. a. $100-$300
10. b. Between 12 and 15 pounds
11. b. Somewhat important
12. b. Somewhat important
13.
Q7 - not important to me personally but if this was a retail product I would say no DIY should be needed for the motor side of things (coupling to the mill and electrical). This is to reduce risk/liability to the seller if someone does it wrong and hurts/kills themself.
This might sound harsh but what is your actual scope for the project and for improving the grain mill? If it is just an out of the box solution I would advise against doing this for a Bachlors degree final year project (only assuming that from Design 5 project). There is little engineering design around buying and bolting a few things together and wiring a motor, a year or 2 before my time through engineering school a team failed their final year project because all they did was buy a camcorder, fleaxable lense exteder, a backpack and a headlamp. Through the camcorder in the backpack and "attached" the lense extender to the headlamp. Boom... instant fail.

I would look at improving upon the existing common roller mill design, e.g. including an adjustment dial so you do not need to feeler gauge the gap, or a hopper with inprocess malt conditioning, or away from the mill a homebrew scale hydrator (forgot the actual term for this) that can be attached to the strike water supply and filled with the grain bill and it combines the grain and strike water nicely to avoid doughballs. The thing to the left of the guy in the red hat's hands in the picture

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Old 02-01-2013, 12:27 AM   #6
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B c c a a b b c a b a c

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Old 02-01-2013, 01:18 AM   #7
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[QUOTE]
University of New Mexico Mechanical Engineering Design V Project
Grain Milling survey
1. c
2. c
3. c
4. a
5. x Under 2 minutes
6. c
7. a
8. c
9. a
10. x Larger than 20 pounds
11. a
12. b

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Old 02-01-2013, 01:46 AM   #8
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No offense; but question 5 was not written from a position of experience. Probably average batch is 5-10 gal with an average 10-20# of grain. The actual Grind takes 15 min for the whole thing

Automation and scales are lick and stick add ons that don't enhance the mill itself or the way it performs.

IMHO; if you wanted to enhance milling for the homebrewer, you would attempt to emulate the mill of the pro brewer (multi pass mill with classified partical separation)

A mill that separates the endosperm from hull material with hulls intact, where the endo is passed through another roll set that has a tighter gap.

Brewhouse efficiency; that's where it's at. Bring pro quality to the home brewer.

Give this a read;
http://509899.cache1.evolutionhosting.com/wp-content/uploads/ImprovingBrewhouseEfficiency-Havig.pdf

Two words ; sieve analysis

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Old 02-01-2013, 01:55 AM   #9
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Quote:
Originally Posted by mattd2
1. b. Intermediate
2. c. Often
3. c. Important
4. a. No
5. a. Within 10 minutes
6. c. Important
7. a. Not important
8. c. Important
9. a. $100-$300
10. b. Between 12 and 15 pounds
11. b. Somewhat important
12. b. Somewhat important
13.
Q7 - not important to me personally but if this was a retail product I would say no DIY should be needed for the motor side of things (coupling to the mill and electrical). This is to reduce risk/liability to the seller if someone does it wrong and hurts/kills themself.
This might sound harsh but what is your actual scope for the project and for improving the grain mill? If it is just an out of the box solution I would advise against doing this for a Bachlors degree final year project (only assuming that from Design 5 project). There is little engineering design around buying and bolting a few things together and wiring a motor, a year or 2 before my time through engineering school a team failed their final year project because all they did was buy a camcorder, fleaxable lense exteder, a backpack and a headlamp. Through the camcorder in the backpack and "attached" the lense extender to the headlamp. Boom... instant fail.

I would look at improving upon the existing common roller mill design, e.g. including an adjustment dial so you do not need to feeler gauge the gap, or a hopper with inprocess malt conditioning, or away from the mill a homebrew scale hydrator (forgot the actual term for this) that can be attached to the strike water supply and filled with the grain bill and it combines the grain and strike water nicely to avoid doughballs. The thing to the left of the guy in the red hat's hands in the picture
That's a Foremasher. It mixes water and grain as it falls to the mash tun so there are no dough balls or rafts.
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Old 02-01-2013, 02:04 AM   #10
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Quote:
Originally Posted by Brewskii View Post
That's a Foremasher. It mixes water and grain as it falls to the mash tun so there are no dough balls or rafts.
Yeah, make a homebrew scale one of those... I hate doughballs!


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