Hello everyone,
Recently Ive been having massive MDF grinder problems and couldnt grind fine enough for espresso. Finally I realised that the play on the thread of the upper burr carrier is the reason. Ive added the two pushers under the carrier that make the stepped regulation mechanism and without the play it all seems to work pretty well.
Anyway I made a short video of how my extraction looks like on the "repaired" grinder:
http://video.google.com/videoplay?docid=8416375597710299418
It seems to start well, slow drips, pretty even pour comming from the whole basket surface, rather than from the sides of the center. Its starts to flow with a thin tail. After a few seconds the cone gets a bit bigger, but still looks pretty good. But at around the 20s the cone gets smaller and it all starts to blond, do you have any ideas whats going on? I switch it off at this moment and the whole extraction took only around 20s. Some info to help you:
Machine: Gaggia Classic
Pressure: around 8,5 bar
Dose: 18,5g
Dose method: split dose, double tamp with 20kg, NFSW on the second one and polished
Distribution method: WDT with a home made tool
Puck after extraction: solid, knocks out of the PF in one piece, shower impression on top
Coffee: 10 days old Bali God Mountain (100% arabica)
I appreciate any ideas
So all you Sherlocks out there, go, go, go!!
Cheers,
dsc.
Recently Ive been having massive MDF grinder problems and couldnt grind fine enough for espresso. Finally I realised that the play on the thread of the upper burr carrier is the reason. Ive added the two pushers under the carrier that make the stepped regulation mechanism and without the play it all seems to work pretty well.
Anyway I made a short video of how my extraction looks like on the "repaired" grinder:
http://video.google.com/videoplay?docid=8416375597710299418
It seems to start well, slow drips, pretty even pour comming from the whole basket surface, rather than from the sides of the center. Its starts to flow with a thin tail. After a few seconds the cone gets a bit bigger, but still looks pretty good. But at around the 20s the cone gets smaller and it all starts to blond, do you have any ideas whats going on? I switch it off at this moment and the whole extraction took only around 20s. Some info to help you:
Machine: Gaggia Classic
Pressure: around 8,5 bar
Dose: 18,5g
Dose method: split dose, double tamp with 20kg, NFSW on the second one and polished
Distribution method: WDT with a home made tool
Puck after extraction: solid, knocks out of the PF in one piece, shower impression on top
Coffee: 10 days old Bali God Mountain (100% arabica)
I appreciate any ideas


Cheers,
dsc.
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