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New grinder giving me grey hairs!
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Discussions > Espresso > Grinders -... > New grinder...  
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trevormc
Senior Member
trevormc
Joined: 11 Jul 2013
Posts: 30
Location: Cape Town, South Africa
Expertise: I love coffee

Posted Tue Feb 25, 2014, 10:25pm
Subject: New grinder giving me grey hairs!
 

Hi all,

I have been pulling good shots with my setup for about 6 months now..
I had a Casadio deko grinder (about the level of a rocky), and Gaggia Carezza with OPV + PID mods.

I just bought a used and somewhat old Fiorenzato T80 Grinder. I put new burrs in last night, gave it a good clean, and tried it out.
I set the burrs so that they were touching, and then backed off a bit.
Well I've been through a whole bag of beans, and not getting anywhere.
With the burrs pretty much touching I choke the machine. If I adjust even one or two tiny steps to the courser side, it gushes out in a 15 second mess.
I've read that this grinder is meant to be really good, on par with a Super Jolly.

This morning I realised that the new burrs are 0.3mm wider than the old ones.. and the lower one doesn't fit in the holder perfectly..
If forced, the burr will screw down flat, but I think maybe the holder is then bending slightly??? Although it doesn't look like it from to my eye with the top burr laid flat with it.
I'm going to get my dremel out and grind a little away from the bottom corner on the 3 points, so that it fits in there easily, like the old one does.. and try again..

But am I now doing something wrong? I tamp to 30-35lb and do everything like I normally do..
Is the new grinder making the puck so much better, that the water lifts the puck and runs around the outside?
I'm not getting any channeling, and the puck is far better than with my previous grinder.
I'm using a 17gm Strada basket, but finding even 16gm (post grind weighed) is pressing against the screen after pulling..

Any advise will be appreciated!
Regards,
Trevor
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,942
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Wed Feb 26, 2014, 8:00am
Subject: Re: New grinder giving me grey hairs!
 

The T80, It is an OK grinder, it works for espresso. The burrs need to be properly seated, if they are perfectly in plane with each other, there is no way that they will grind fine enough and have any adjustment. What happens is that when the burr is cocked in the mount, there will be a space on one side of the burr while the other side is touching the mating burr. This means that the coffee will flow out the space and not be ground properly no matter how you adjust the grinder.

I think you found your own problem, just do what you need to do to get the burrs flat and let us know how it went :D

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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peterkub
Senior Member
peterkub
Joined: 1 Aug 2011
Posts: 22
Location: Granger, Indiana, USA
Expertise: I love coffee

Espresso: Gaggia Espresso
Grinder: Compak K3 Touch
Posted Wed Feb 26, 2014, 8:07am
Subject: Re: New grinder giving me grey hairs!
 

OK, I'll bite :)

Flat burrs have to sit flat. If lower or upper burr is at an angle you'll have part of burrs producing finer grind than the opposite side. When you mix dust with coarser grind you can still choke any machine. Makes me wonder why the difference in size, but if forcing the burrs in does not make the holder buckle try it. If it works you can go back and work your dremel miracle.

Good luck!
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trevormc
Senior Member
trevormc
Joined: 11 Jul 2013
Posts: 30
Location: Cape Town, South Africa
Expertise: I love coffee

Posted Wed Feb 26, 2014, 10:11am
Subject: Re: New grinder giving me grey hairs!
 

Hi,

I have done a bit of grinding with the dremel and reseated the burrs. It is behaving itself now.
The top burr was also not centered, so I sorted that out.
Measured everything with a vernier and it's all as level and parallel as it can be.

Why do you say that it's only an OK grinder? Because of it's adjustment method? Granted it does have a fair amount of grind retention.. but a mod or two can sort that out.

Thanks for the advice :-)
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,942
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Wed Feb 26, 2014, 12:31pm
Subject: Re: New grinder giving me grey hairs!
 

Mostly for the step adjustment setup and that I could never get one to single dose properly. When fed from a hopper, the grinder never skipped a beat but it did not like to feed properly with a small volume of beans.

The quality of the grind is good, just the step and single dosing issues.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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