Philips 3000 series, Service Manual, Page: 34 / 79

PHILIPS 4000 and 3000 04 OPERATING LOGIC
4/10
4.4. Coffee grinder Philips 4000
2
3
4
5
1
The coffee grinder is driven by a direct current motor (1) using a worm screw helicoidal wheel
transmission (2).
The worm screw (2) drives a plastic gear wheel (3), which turns the lower grinder (4) and the
increment pin (5)
4.4.1 Autodose system description
mA
I
0
I
0
+ 100
I
0
+ 55
I
0
+ 200
Aroma 4/5
Aroma 2/3
Aroma 1
Auto-Zero
100≤ I
0
≤300
I
0
= current when the BU is moving without load, i.e. without coffee. It occurs, for example, dur -
ing the rinsing phase of coffee spout.
Current targets:
Aroma 1 55mA
Aroma 2/3 100mA
Aroma 4/5 200mA
100 mA ≤ I
0
≤ 300 mA
If the BU current is ≤ the current target the grinding time
If the BU current is ≥ the current target the grinding time