手順 1を翻訳中
手順1
Inspect your grinder impeller
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Remove the hopper and take the upper burrs out. Empty out any coffee grounds (An air gun or vacuum helps) and then inspect the impeller blades.
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If the impeller can fit through the hole (ie: be removed just by taking out the lower burr) then it definitely needs replacement.
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A good impeller should not be removable without dis-assembly and the tips of the impeller blades should not be visible.
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