© by N&W GLOBAL VENDING S.p.A. 19 10 2009 3325 - 00
manual grinding regulaTion
If it is necessary to change the grinding degree, act on
the corresponding coee-grinder knob (g. 26 B) prop-
ertly and more precisely:
- turn counterclockwise to obtain a coarser grinding
degree;
- turn clockwise to obtain a ner grinding degree.
It is recommended to vary the grinding degree during the
operation of the coee-grinder motor.
Please Note: after having changed the grinding
degree, make at least 2 selections to check the new
granulometry of ground products carefully:
The ner the grinding degree, the longer the time re-
quired to dispense the coee drink and viceversa.
SELF ADJUSTING GRINDING
A device intended to regulate the distance between the
grinding wheels automatically and therefore the grinding
degree can be mounted on the grinder, either as a
standard or as an optional.
The automatic regulation device of the grinding wheels
(g. 28 A) will keep the dispensed drink quality constant
all over the time by balancing any variation due to the
product, the environment and the wear of the grinding
wheels.
selecTion of reference
To monitor the automatic grinding regulation parameters
(grinding time and brewing time) properly, the machine
will assume a selection as a reference for the operation
of automatic devices.
The device will make sure that the brewing time (pro-
grammable via software) required to dispense a water
quantity corresponding to a (xed) number of pulses of
the volumetric counter (cdv) is actually reached. Oth-
erwise, it will vary the grinding degree by acting on the
bidirectional motor controlling the distance between the
grinding wheels.
When you decide to act on the grinder-doser from the
programming menu, the led of the selection used as a
reference will turn on.
The brewing time and the grinding time of coee dose
will be measured on this selection and on those with
similar doses. Any subsequent measurement will be
therefore made on this selection.
The change in the grinding degree is a result of a
change in the brewing time required; grinding wheels will
gradually approach (ner granulometry) to avoid com-
pressing coee.
Please Note: To check the new brewing time care-
fully, keep in mind that the eect of any automatic
change in the grinding degree is perceived after
some selections.
After the regulation has become stable, please also
check the ground coee quantity that can slightly
change.
Fig. 26
1- Grinder motor
2- Self-regulating grinding motor
3- Grinding wheel movement screw
4- Doser electromagnets
5- Manual regulation knob
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