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Mini Vivaldi II Consistently Inconsistent
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Discussions > Espresso > Machines > Mini Vivaldi II...  
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IMAWriter
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IMAWriter
Joined: 4 Jul 2002
Posts: 5,689
Location: Brentwood, TN
Expertise: I live coffee

Espresso: Bezzera Strega
Grinder: Forte, Preciso/Esatto, KyM...
Vac Pot: Adcraft SS, Yama 8 cup
Drip: Brazen, Kalita, Chemex,...
Roaster: Behmor 1600, CO/UFO combo
Posted Sun Mar 3, 2013, 4:34pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

SISC Said:

Wouldn't stale coffee have less oil in it, and produce the opposite result from what I am experiencing?  Seems that the first shot would pour faster and with greater volume, not the second.

Keep in mind also that the Mini VII has volumetric dosing.

I don't leave ground coffee in the grinder doser.  Any left over coffee is less than a gram.  I appreciate your comment, but I am having a hard time understanding the theory behind it.  

Further, I get the same result even if I do 2 shots, wait an hour, and do 2 more.  Hard to believe less than a gram of coffee would make that much difference in that short of time period.  

My previous machine was a Silvia, and I never experienced this issue, and I am not grinding any differently.

Posted March 3, 2013 link

Did you have the same grinder with the Silvia?
I find it hard to believe your M Mini holds only 1gram back. i have to agree with Jman here.
The only other thing is your Espro tamper, then again, if it's ALWAYS the same scenario, then the stale grind muyst be the thing.
Why not go with the flow here, and before your first shot in the AM, grind for 2 seconds, and toss that grind into your compost.
Then proceed.

 
Rob J (LMWDP #187)
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IMAWriter
Senior Member
IMAWriter
Joined: 4 Jul 2002
Posts: 5,689
Location: Brentwood, TN
Expertise: I live coffee

Espresso: Bezzera Strega
Grinder: Forte, Preciso/Esatto, KyM...
Vac Pot: Adcraft SS, Yama 8 cup
Drip: Brazen, Kalita, Chemex,...
Roaster: Behmor 1600, CO/UFO combo
Posted Sun Mar 3, 2013, 4:35pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

zedex Said:

Try a warm up shot with no grounds in the PF. Then try your 2 shots.

Posted March 3, 2013 link

+1. That was my next suggestion. :>D

 
Rob J (LMWDP #187)
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SISC
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Joined: 3 Mar 2013
Posts: 10
Location: Sullivans Island
Expertise: I like coffee

Espresso: Mini Vivaldi II
Grinder: Mazzer Mini
Posted Sun Mar 3, 2013, 4:42pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

IMAWriter Said:

Did you have the same grinder with the Silvia?
I find it hard to believe your M Mini holds only 1gram back. i have to agree with Jman here.
The only other thing is your Espro tamper, then again, if it's ALWAYS the same scenario, then the stale grind muyst be the thing.
Why not go with the flow here, and before your first shot in the AM, grind for 2 seconds, and toss that grind into your compost.
Then proceed.

Posted March 3, 2013 link

Same grinder, same procedure.
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IMAWriter
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IMAWriter
Joined: 4 Jul 2002
Posts: 5,689
Location: Brentwood, TN
Expertise: I live coffee

Espresso: Bezzera Strega
Grinder: Forte, Preciso/Esatto, KyM...
Vac Pot: Adcraft SS, Yama 8 cup
Drip: Brazen, Kalita, Chemex,...
Roaster: Behmor 1600, CO/UFO combo
Posted Sun Mar 3, 2013, 4:45pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

SISC Said:

Same grinder, same procedure.

Posted March 3, 2013 link

Gotcha.
Please keep us posted, as your "issue" may apply to other machines with similar operating style.

 
Rob J (LMWDP #187)
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SISC
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Joined: 3 Mar 2013
Posts: 10
Location: Sullivans Island
Expertise: I like coffee

Espresso: Mini Vivaldi II
Grinder: Mazzer Mini
Posted Sun Mar 3, 2013, 4:50pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

One more fact comes to mind.   The first shot has better creama and better flavor than the second.  If stale coffee in the first shot is the difference, I need to figure out how to get some stale coffee into the second shot!
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JohnLyn
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JohnLyn
Joined: 15 Aug 2011
Posts: 244
Location: Golden, BC, Canada
Expertise: I love coffee

Espresso: La Spaziale Mini Vivaldy
Grinder: Vario
Drip: Bonavita
Roaster: Toastess popper
Posted Sun Mar 3, 2013, 5:36pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

As a MiniV user I can say that I have not had that strange problem, but I'm using a vario. And your first shot is better? My first shot is usually the shot that I use to make any adjustments to improve the next ones. Strange issue?

Is this a Mazzer mini problem?? or a pressure and/or temp stability problem on the unit?
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IMAWriter
Senior Member
IMAWriter
Joined: 4 Jul 2002
Posts: 5,689
Location: Brentwood, TN
Expertise: I live coffee

Espresso: Bezzera Strega
Grinder: Forte, Preciso/Esatto, KyM...
Vac Pot: Adcraft SS, Yama 8 cup
Drip: Brazen, Kalita, Chemex,...
Roaster: Behmor 1600, CO/UFO combo
Posted Sun Mar 3, 2013, 5:40pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

JohnLyn Said:

As a MiniV user I can say that I have not had that strange problem, but I'm using a vario. And your first shot is better? My first shot is usually the shot that I use to make any adjustments to improve the next ones. Strange issue?

Is this a Mazzer mini problem?? or a pressure and/or temp stability problem on the unit?

Posted March 3, 2013 link

Well, I am going to go out on a limb and say it's a Mazzer Mini thing, as I've not seen (as far as I remember) this exact issue on CG since the inception of the vII version of the La Spaz mini.

 
Rob J (LMWDP #187)
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SISC
Senior Member


Joined: 3 Mar 2013
Posts: 10
Location: Sullivans Island
Expertise: I like coffee

Espresso: Mini Vivaldi II
Grinder: Mazzer Mini
Posted Sun Mar 3, 2013, 5:55pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

IMAWriter Said:

Well, I am going to go out on a limb and say it's a Mazzer Mini thing, as I've not seen (as far as I remember) this exact issue on CG since the inception of the vII version of the La Spaz mini.

Posted March 3, 2013 link

What kind of "Mazzer Mini thing"?  If you have read all my posts, you'll see that 1) I clear the grinder after each use; 2) I didn't have this problem with the same grinder, same procedure  and a Silvia.

So what kind of "thing"?
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IMAWriter
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IMAWriter
Joined: 4 Jul 2002
Posts: 5,689
Location: Brentwood, TN
Expertise: I live coffee

Espresso: Bezzera Strega
Grinder: Forte, Preciso/Esatto, KyM...
Vac Pot: Adcraft SS, Yama 8 cup
Drip: Brazen, Kalita, Chemex,...
Roaster: Behmor 1600, CO/UFO combo
Posted Sun Mar 3, 2013, 6:11pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

SISC Said:

What kind of "Mazzer Mini thing"?  If you have read all my posts, you'll see that 1) I clear the grinder after each use; 2) I didn't have this problem with the same grinder, same procedure  and a Silvia.

So what kind of "thing"?

Posted March 3, 2013 link

Sorry, Didn't mean to touch off a nerve, but in reality the specs of the Mazzer mini have been surpassed by other grinders, including Macap, Compak, and the Vario series, as regards consistency and a somewhat less clumpy grind. In the case of the vario, barely any clumping.
BTW, "thing" meant "issue", in your case. BTW, how old are your burrs? Was the grinder new? If not, did you purchase new burrs (a must when buying a used Mazzer.)
We are only trying to help, so perhaps a little less attitude would be nice.
We've all resisted the usual comment which would be "perhaps it's your technique."

Maybe post a video of your grinding, packing the basket and pulling the shot?
Are you using a bottomless PF so you can observe the pour?

 
Rob J (LMWDP #187)
My Music Production web site:
www.robertjason.com
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germantownrob
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germantownrob
Joined: 2 Dec 2007
Posts: 2,135
Location: Philadelphia
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Espresso: Duetto 3, A Dead Oscar
Grinder: Vario-W, Preciso w/Esatto,...
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Roaster: Diedrich IR-1, HT B
Posted Sun Mar 3, 2013, 6:15pm
Subject: Re: Mini Vivaldi II Consistently Inconsistent
 

"Question about volumetric dosing?"

If the basket is not completely dry before dosing the next shot I find I get channeling from the edge of the basket, ie quicker second shot.
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