Saeco M-50 Operation And Maintenance page 31

9.2.5 Grinding recalibration
Recalibration changes all
previous settings.
Close the arm for coffee bean hopper closure.
Grind the coffee left in the grinders by turning the control
knob to "On" until there is no more ground coffee coming
out from the coffee grinder. Then turn the control knob
to "Off". Unplug the coffee grinder.
Remove the coffee bean hopper from the base by rotating
it counter-clockwise.
At this point you can proceed with the steps for grinding
recalibration. Coffee grinder recalibration may be carried
out to get a coarser or finer grinding. The two procedures
are shown below.
9.2.5.1 Recalibration for Coarse
Grind
Take note of the position of the current adjustment. Turn
the grinding adjusting collar to position 15.
Raise the recalibration release lever and remove the
adjusting collar.
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