Spot the puck prep problem
Identify puck-prep evidence that can cause espresso channeling and uneven extraction.
Same dose and grind, but the puck is not ready for even flow. Find the prep issue that should be fixed before changing the grinder. Mounded coffee and clumps on one side of the basket Correct. Uneven distribution changes local resistance and invites channeling. Tamper lying beside the basket The tamper is a tool, not the problem. The coffee bed itself shows the risk. Portafilter handle The handle does not affect extraction. Focus on the density pattern inside the basket. Clean tamping mat surface The mat is not the extraction risk. The uneven puck is. Espresso puck preparation You separated…
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