Saeco TALEA Service Manual

Saeco TALEA Service Manual Manual pdf 33 page image

Page 6 / 14 Saeco Internationa Group04 FUNCTIONAL PRINCIPLES TALEA / ODEA - LINEWith 2 microswitchesThe gear is powered by a direct current motorthat engages in the smaller double toothedgear using the worm gear drive. The brewingunit is placed on the axis between the largegeared tooth and is moved by the change indirection of the motor between the home andbrewing positions.The end positions are monitored by theswitching pins and the corrispondingmicroswitches.Home position: MS1 / Pin 1Brewing position: MS2 / Pin 2When moving to the home position, pin 1activates the MS1, the motor changes thedirection of rotation and the pin disactivates theMS1.The pin is positioned 2 mm away from theswitching point in its home position.12MS1MS24.5. Brewing unit’s gear mechanismTemperature sensorAn NTC is used as the temperature sensor:If the NTC senses too high temperatures,electronics decreases boiler’s temperature thatis controlled by the resistance’s voltage.Resistance values and the corrispondingtemperatures: see table4.6. Temperature sensor (control)Single microThe function is the same as with 2 micros-witches. However, here a toothed gear withcontinuous pin is used and a single micros-witch takes over the monitoring of both endpositions.Important: during the movement between thebrewing and home position, the microswitchis not activated (does not move onto the pin),but both ends of the pin switch the micros-witch in their final positions.Home position: Pin 1Brewing position: Pin 2MS12T (°C) R (kΩ) ΔR (+/- %)20 61.465 8.650 17.599 5.975 7.214 4.180 6.121 3.785 5.213 3.490 4.459 3.1100 3.3 2.5125 1.653 3.9150 0.893 5.1