I have recently purchased a used Bezzera BZ99S and Lido E grinder and I am having difficulties in finding the right grind and dose. The machine has been serviced by a Bezzera specialist and he reported that it is performs pretty well when tested after the service.
The puck is always covered in water an a little sloppy and some coffee rises up on the edge of the basket. I use a espy calibrated tamper and use the NSWE technique with no polishing.
I cannot change the dosing much as the shower screen protrudes into the basket by a large amount and I am constraint by that in not exceeding a certain puck height.
I have tried to set the grinder from 4 to 10 with no great difference on the results. I suspect that the problem might be related to the fact that the shower screen (just replaced) is actually convex so it is quite difficult to get the dosing right, as the puck can press against the outer edge and at the same time have a gap at the centre of the screen.
To have a flat screen I should leave the screen screw quite loose which would just about hold the shower head in place.
What am I doing wrong?
The puck is always covered in water an a little sloppy and some coffee rises up on the edge of the basket. I use a espy calibrated tamper and use the NSWE technique with no polishing.
I cannot change the dosing much as the shower screen protrudes into the basket by a large amount and I am constraint by that in not exceeding a certain puck height.
I have tried to set the grinder from 4 to 10 with no great difference on the results. I suspect that the problem might be related to the fact that the shower screen (just replaced) is actually convex so it is quite difficult to get the dosing right, as the puck can press against the outer edge and at the same time have a gap at the centre of the screen.
To have a flat screen I should leave the screen screw quite loose which would just about hold the shower head in place.
What am I doing wrong?


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