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PHI 5000
3.7. Coffee grinder 120-127V
The coffee grinder is activated by a direct current motor (1) via helicoidal wheel transmission and a worm
screw (2).
The worm screw (2) activates a plastic toothed wheel (3), which turns the lower grinder blade (4) and the
increment pin (5).
There are two magnets (6) in the toothed wheel and with every rotation they transmit two pulses to a Hall
sensor, which in turn transmits them to the electronic system.
3.8. Detection of coffee bean absence, dose adjustment, blocked coffee grinder
t1
V
t2
t3
t4
6
1
Without beans n=100%
With beans n=100%
Without beans n=50%
With beans n=50%
t
3
No coffee
hen no coffee beans are present, this is detected by the Hall sensor due
W
to variations in the pulse frequency (with or without coffee).
If there are no coffee beans (operation while empty), the number of rota-
tions and therefore the number of pulses, will be greater
t1 = no coffee signal
If there are coffee beans, the number of rotations will be lower due to
the force created during the grinding process
t2 = no signal
t3 and t4 = this reading is taken
at the end of each grinding process
Dose quantity adjustment
The dose quantity is adjusted in accordance with the pulses detected
(number of rotations proportional to the weak, medium and strong
flavour selection)
Blocked grinder blades
If the coffee grinder is blocked for any reason, pulses will no longer be
transmitted to the electronic system and the grinder stops
03 OPERATING LOGIC
5
4
2
4/8
- Quick Links:
- Repair Flow
- Disassembly
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