Saeco RI9722/11, Service Manual

Page: 154 / 224

4. FUNcTION/TIMING INCANTO
Saeco International Group
REV.5 FEB.2005 Saeco Austria AG
Measured values (KTY)
Temperature Resistance ( ȍ ) Resistance trend ( ȍ )
0 1629 0
15 1845 216
20 1922 77
40 2246 324
90 3168 922
100 3366 198
130 3979 613
140 4188 209
At room temperature the resistance is approx. 1.9K
ȍ
.
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.