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Gaggia MDF - Either too fine or too coarse
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Lorenzomusic
Senior Member


Joined: 9 Nov 2012
Posts: 2
Location: Copenhagen
Expertise: I love coffee

Espresso: Gaggia Classic
Grinder: Gaggia MDF
Posted Fri Nov 9, 2012, 2:03am
Subject: Gaggia MDF - Either too fine or too coarse
 

Greetings!
When I grind on step 5, I have to be really gentle with the tamper. On step 6, I have to punish it in order to not get Niagra Falls dripping.
In general, should one go for the light touch or the tougher one? It's not 15 pounds pressure either way - at least with these beans.

The color of the drip seems much more darker in the beginning when I do the light tamp on level 5. I use a Gaggia Classic.
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NobbyR
Senior Member
NobbyR
Joined: 10 Jul 2011
Posts: 1,991
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Fri Nov 9, 2012, 5:30am
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

The steps of the MDF are rather wide, therefore it can happen that the ideal setting of the grinder is in between two steps. In that case you'll have to adjust by tamping pressure or dose modification.

 
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"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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qualin
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qualin
Joined: 30 Jun 2012
Posts: 646
Location: Calgary, AB
Expertise: I love coffee

Espresso: Izzo Alex Duetto 3
Grinder: Mazzer Mini Elect. Type A
Vac Pot: Looking to buy
Drip: Manual
Roaster: Considering?
Posted Sun Nov 11, 2012, 1:44am
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

IMHO, better to adjust by dose than by tamp. Always a good idea to keep tamping pressure consistent.

On step 6, can you get away with a 16 or 17 gram updose to slow the shot down?

On step 5, what happens if you downdose by a gram or two?

 
Garbage In, Garbage Out, for every step of the process. From Beans to grinder, grounds to machine, coffee to cup.
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NobbyR
Senior Member
NobbyR
Joined: 10 Jul 2011
Posts: 1,991
Location: Germany
Expertise: I love coffee

Espresso: Poccino Opus One, Ariete
Grinder: Eureka Mignon Istantaneo
Vac Pot: N/A
Drip: Melitta Linea Unica de Luxe
Roaster: N/A
Posted Sun Nov 11, 2012, 2:28am
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

qualin Said:

IMHO, better to adjust by dose than by tamp ...

Posted November 11, 2012 link

You're right, Bud, the influence of tamping on extraxtion time is rather limited and it's best to keep tamping pressure consistent. However, professional baristas often compensate the otherwise necessary difference in coarseness setting between the single shot and double shot basket by adjusting tamping pressure, simply because they don't want to fiddle about grinder settings all the time. But that takes a lot of experience in order to get good and repeatable results, and for the average home barista it's more practicable to adjust the dose. But one should know that it's done at the possible cost of altered taste.

 
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"This drink of the Satan is so delicious that it would be a shame to leave it to the infidels." (Pope Clement VIII on coffee, when he was urged to ban the beverage)
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marlap
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marlap
Joined: 5 May 2012
Posts: 48
Location: Montreal
Expertise: I love coffee

Espresso: Starbucks Barista Athena
Grinder: Braun KM 30 (modded)
Posted Sun Nov 11, 2012, 6:28am
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

Go here for the Gaggia MDF stepless modification:

Click Here (www.home-barista.com)
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DrRoadrash
Senior Member


Joined: 17 Jan 2012
Posts: 2
Location: Milwaukee, WI
Expertise: I love coffee

Espresso: Gaggia Classic
Grinder: MDF Grrr
Posted Sun Nov 11, 2012, 9:33pm
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

marlap Said:

Go here for the Gaggia MDF stepless modification:

Click Here (www.home-barista.com)

Posted November 11, 2012 link

Yes the stepless mod turns this into a pretty good grinder.  Takes all of 15 minutes is cheap and reversible if you ever what to go back.  The steps are way too large as you have found out.  I am between a 4-5 most of the time.
Aaron
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Lorenzomusic
Senior Member


Joined: 9 Nov 2012
Posts: 2
Location: Copenhagen
Expertise: I love coffee

Espresso: Gaggia Classic
Grinder: Gaggia MDF
Posted Wed Nov 14, 2012, 2:43am
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

Thanks for your replies! I have experimented with less dose and keeping it on finer grind in order to keep tamping consistent, and It's getting better.

I'll take a look at the mod with the teflon tape. I think the spring for the dose handle went off the other day, so I have to open this baby up anyway.
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DrRoadrash
Senior Member


Joined: 17 Jan 2012
Posts: 2
Location: Milwaukee, WI
Expertise: I love coffee

Espresso: Gaggia Classic
Grinder: MDF Grrr
Posted Wed Nov 14, 2012, 8:40pm
Subject: Re: Gaggia MDF - Either too fine or too coarse
 

Yup open it up fix then spring and do the teflon tape mod you will never look back.  Until next week when that damn spring breaks again...
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