For about 3 years I've been able to grind fine enough for good espresso. All of a sudden, I can't get a fine grind. I've unscrewed the top grinder, cleaned out the machine, rescrewed the top grinder down as tight as possible and the grind is even worse. The two bur grinders don't seem to get close enough to each other to grind fine. The threads are screwing in properly (not cross-threaded). Any ideas?
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After taking the top burr off several times and rescrewing it, I finally was able to exert enough force to get it to turn a couple of extra turns. Evidently there was some oil or coffee gunk (although I could see none) that snagged the bur. Now it appears to work as before.
This is a great, service by the way. Even the process of thinking through the problem so I could post it helped me solve it.
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I have a similar problem. Grind is no longer fine enough. The coffe ground container has a screw in its base to stop you from letting both grind wheels touch but on my unit it was bent out of shape (don't think I did this) I removed it and now go beyond "zero" grind without letting the wheels touch but the ground is still to rough and the pour too fast. I'll try and remove the top wheel and clean the wheel as you suggest.
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