Saeco Syntia Service Manual

Also see for Syntia: Operating instructions Operating instructions Service manual Quick start guide

SYNTIA 04 OPERATING LOGICSaeco International Group Rev.01 February 2010 Page / 064.6. Coffee grinder function2345614.7. Low bean level detection, dose quantity adjustment, coffee grinderblockedt1Vt2t3t4tWithout beans n=100%With beans n=100%Without beans n=50%With beans n=50%Ceramic coffee grinderThe coffee grinder is driven by a direct current motor (1) using a worm screw helicoidal wheeltransmission (2).The worm screw (2) drives a plastic gear wheel (3), which turns the lower grinder (4) and theincrement pin (5)There are two magnets (6) in the gear wheel; at every rotation these transmit two pulses to a Hallsensor, which in turn transmits them to the electronic system.No coffeeA low coffee bean level is detected by the Hall sensor, aftervariations in the pulse frequency (with or without coffee).If there are no coffee beans (operation while empty), thenumber of rotations – and therefore the number of pulses –will be greatert1 = No coffee indicationIf, however, there are coffee beans, the number of rota-tions will be lower due to the force created by the grindingt2 = no indicationt3 and t4 = this measurement is performed at the end ofeach grinding processDose quantity adjustmentThe dose quantity is adjusted in accordance with the pulsesdetected (number of rotations proportional to the selectedflavour – mild, medium or strong)Coffee grinder blockageIf the coffee grinder becomes blocked for any reason,pulses will no longer be transmitted to the electronic sys-tem and the grinder will come to a stop05