Saeco M-50 Operation And Maintenance page 33

To get a fine grind, reposition the collar on position 17.
Reinsert the adjusting collar by pressing downwards the
front part first and the back part after. Make sure you hear
2 clicks.
Place the grinding adjustment to get the desired grinding
value.
Reassemble the coffee bean hopper on the base of the
coffee grinder. Open the closure arm.
A too fine recalibration can
lead to rubbing of the two
grinders, thus causing noise.
If this happens, turn off the
coffee grinder and select a
coarser grind (setting close
to 30) or recalibrate for a
coarser grind.
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