Grinder; Doser - Saeco RI9722/11 Service Manual

4. FUNcTION/TIMING
Measured values (KTY)
Temperature Resistance ( )
0 1629
15 1845
20 1922
40 2246
90 3168
100 3366
130 3979
140 4188
At room temperature the resistance is approx. 1.9K .

4.7. Grinder

The grinder is a conical grinder with upper and lower grinding disc. The grinding level is set by adjusting
the height of the upper grinding disc by means of the screw thread.
If the grinding discs are drawn apart by turning the grinding level adjusting ring (turning anti-clockwise),
the grinding is coarser, while turning the adjusting ring clockwise will result in a finer grinding.
ATTENTION: Adjust the grinding level only when the grinder is in operation!
EXCEPTION: Grinder is empty.
The grinder operates with a direct current motor and the grinding disc rotation speed is determined by a
gearmotor. The grinder motor operates with a voltage of 260 V direct current.
The grinder is equipped with an anti-gravel protection (friction clutch).

4.8. Doser

The coffee quantity for the current coffee process is portioned (dosed) in the doser chamber; a higher dose
results in a stronger (more concentrated) coffee. A lower dose results in a weaker (less concentrated
coffee).
The doser is controlled by a microswitch. The ground coffee is transferred from the grinder and is pressed
into the dosing chamber; when the dosing chamber is full, the microswitch is activated and transmits to the
CPU the signal to turn the grinding motor OFF.
Grinding is stopped, the dosing magnet engages, opens the dosing flap and the coffee falls into the brewing
unit.
If the dosing microswitch is not activated within 20 seconds from start of the grinder motor, the coffee
beans low signal appears.
The dosing quantity is set automatically by shifting the doser housing wall together with its microswitch.
Adjustments can be made with the hand wheel in the coffee bean container.
Saeco International Group
Resistance trend ( )
0
216
77
324
922
198
613
209
REV.5 FEB.2005
INCANTO
Saeco Austria AG