Philips EP5360/10 - Coffee Grinder (120-127 V); Coffee Bean & Grinder Diagnostics

PHI 5000 03 OPERATING LOGIC
4/8
3.7. Coee grinder 120-127V
2
3
4
5
6
1
3.8. Detection of coee bean absence, dose adjustment, blocked coee grinder
t1
V
t2
t3
t4
t
Without beans n=100%
With beans n=100%
Without beans n=50%
With beans n=50%
e coee grinder is activated by a direct current motor (1) via helicoidal wheel transmission and a worm
screw (2).
e worm screw (2) activates a plastic toothed wheel (3), which turns the lower grinder blade (4) and the
increment pin (5).
ere 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.
No coee
When no coee beans are present, this is detected by the Hall sensor due
to variations in the pulse frequency (with or without coee).
If there are no coee beans (operation while empty), the number of rota-
tions and therefore the number of pulses, will be greater
t1 = no coee signal
If there are coee 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
e dose quantity is adjusted in accordance with the pulses detected
(number of rotations proportional to the weak, medium and strong
avour selection)
Blocked grinder blades
If the coee grinder is blocked for any reason, pulses will no longer be
transmitted to the electronic system and the grinder stops