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Passo 23
Some beans, especially the "roasted so dark it's nearly charcoal" variety can be way too oily. The characteristic is that rather than grind to a powder it turns to "paste" in the lower chamber. This is obviously bad, because it then comes out in clumps or not at all.
Troubleshooting #5: Clumpy Grounds or Little to Nothing Coming Out
  • Some beans, especially the "roasted so dark it's nearly charcoal" variety can be way too oily. The characteristic is that rather than grind to a powder it turns to "paste" in the lower chamber. This is obviously bad, because it then comes out in clumps or not at all.

  • Clumpy grounds, for some reason tend to overshoot the portafilter and make a mess. I suspect this is because the large clump size has more mass, and comes out of the chute with too much momentum.

  • If you pull the upper burr, and see what looks like a nice smooth black surface where the impeller would normally be, then that's your sign.

  • The Fix: Clean the lower chamber, or at least break up the cake of grounds, and switch to a less oily roast.

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