Re: EM6910 stuck puck
My scientific mind is satisfied.
I have a reproducible experiment! 8-)
Method A. will produce a puck that comes out neatly.
Method B. will produce a puck that will stick to the shower screen and occasionally break up in the PF.
I performed six experiments in a row, alternating between the two methods. I had 100% repeatable results with three stuck pucks and three good pucks.
My scientific mind is satisfied.
I have a reproducible experiment! 8-)- Preheat group handle and portafilter by running 100 ml of water through.
- Wipe dry portafilter and shower screen.
- Fill portafilter with freshly ground coffee and tamp with 15kg pressure.
- A. Fill so that the silver portion of the Sunbeam tamper is about half way above the top of basket.
(Normal grind)
B. Fill so that the silver portion of the Sunbeam tamper is completely inside the basket - about 0.5-1.0mm under the top of basket.
(Slightly finer grind to achieve equivalent extraction to above method.)
- A. Fill so that the silver portion of the Sunbeam tamper is about half way above the top of basket.
- Pull about a 35-40 ml shot.
- Wait 20 seconds.
- Remove PF.
Method A. will produce a puck that comes out neatly.
Method B. will produce a puck that will stick to the shower screen and occasionally break up in the PF.
I performed six experiments in a row, alternating between the two methods. I had 100% repeatable results with three stuck pucks and three good pucks.

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