Coffee Lack Detection And Coffee Grinder Blocked 230V - Saeco GAGGIA VELASCA CMF-OTC Service Manual

GAGGIA VELASCA
1) When the system get the stability (i.e. the system got the current target) the coffee doses
should be:
with medium grinding (500±60μm) and using coffee of test.
2) the 3 grinding times are always:
beside, every grinding time is, respectively:
4,0s ≤T ≤10s (10000ms)
3
3,5s ≤T ≤9s (9000ms)
2
3,0s ≤T ≤8,1s (8100ms)
1
Aroma1
Aroma2
Aroma
of the
Aroma3
grinded
product
Aroma4
Aroma5

4.6. Coffee lack detection and coffee grinder blocked 230V

When the coffee grinder is working, the software monitors the current consumption. If the current
value is very low, the machine concludes that coffee is missing; if the current value is very high, the
machine concludes that the coffee grinder is blocked; instead, if the current value is in the middle,
the machine concludes that all is ok and it goes on to do the product.
Because the current consumption of grinder changes depending on the situations (motor new or
old, cold or hot, etc., coffee blends), these current thresholds are not static, but dynamic.
A1
7,5
Grinder
5 levels
Time
Very Light
Light
Med
Strong
Very Strong
A2/3 A4/5
9,0 10
T <T <T
1 2 3
DOSE ADJUSTMENT
Min
Grinder
Time
T 3s
1
T 3,5s
2
T 4s
3
04 OPERATING LOGIC
±1,5 grams
Max
Grinder Curret target
Time
8,1s I 55mA
0 +
9s I 100mA
0 +
10s I 200mA
0 +
5/7