Dose Self-Learning (Sas) - Philips 4000 Service Manual

PHILIPS 4000

3.6.2. Dose self-learning (SAS)

The aim of this function is to automatically regulate the average dose of ground coffee (SELF-LEARNING); this
takes place with an algorithm based on the following values and setting by the user:
1. Number of coffee grinder pulses during the grinding cycle.
2. Max. average value of the power consumed by the gear motor during the coffee brewing cycle.
3. Aroma selected by the user.
The algorithm compares the maximum average value of the power consumed by the gear motor with the value
listed in the table for the selected aroma, in order to calculate the new grinding pulse value for the next coffee
produced.
- If the power consumption value is less than the minimum current value, the grinding pulses will be increased
by 2.
- If the power consumption value is greater than the maximum current value, the grinding pulses will be
decreased by 4.
- If the power consumption value falls within the "over-torque" interval (800≤ MAX_CURRENT_mA ≤1000),
the product will be dispensed and the grinding pulses will be decreased by 10.
- If the power consumption value falls within the "abort cycle" interval (MAX_CURRENT_mA>1000), the
dreg will be expelled and the grinding pulses will be decreased by 10.
- If the "pre-ground" flavour is selected by the user, no modification will be made.
This guarantees that, regardless of the coffee type used, the grinding level setting and the wear on the
grinders, the ground coffee dose always remains constant.
3 levels
A
Mild
Aroma
B
of the
Medium
grinded
product
C
Strong
Important:
For perfect operation, machine adjustment should take place in the area of the fields highlighted in green (A,
B, C). When the type or brand of coffee is changed, there may be variations in the size of the beans and their
stickiness or roasting level. This leads to variations in power consumption (mA), with resulting excessive or
insufficient doses (until the necessary adjustments have been made to compensate for this change).
Caution: In the case of excessive dosage, powder may be expelled into the dreg drawer. This is not a fault,
but can occur during first usage or after repair.
5 levels +2
MAX_CURRENT_
Extra Mild mA <150mA
Mild
MAX_CURRENT_
mA <250mA
Medium
Strong
MAX_CURRENT_
mA <350mA
Extra Strong
DOSE ADJUSTMENT (NUMBER OF GRINDER IMPULSES)
TO APPLY TO MED AROMA
0 -4
<=150mA
MAX_CURRENT_
MAX_CURRENT_
mA >250mA
mA <=250mA
<=250mA
MAX_CURRENT_
MAX_CURRENT_
mA >350mA
mA <=350mA
<=350mA
MAX_CURRENT_
MAX_CURRENT_
mA >500mA
mA <=500mA
03 OPERATING LOGIC
-10 OVER- -10 CYCLE
TORQUE ABORTED
MAX_CURRENT_ MAX_CURRENT_mA
mA >800mA >1000mA
MAX_CURRENT_ MAX_CURRENT_mA
mA >800mA >1000mA
MAX_CURRENT_ MAX_CURRENT_mA
mA >800mA >1000mA
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