e methacrylate rotor (2) is centred by means of tabs with a size that is dierent to that of the rotor centering
device (8) and secured rmly by a bolt (7). e initiation photosensor (9) detects the initial position of the rotor.
e heating canal (4) is insulated (6). e canal is thermostatted at 37 C by 4 peltiers (10), with their respective
radiators (11) and fans (12).
e rotor shaft is connected to a pulley (14) which transmits the motor movement (15) through a belt (17) and
a pinion (16). e encoder disk (13) is attached to the pulley. e photosensors (18) relays the movement of the
encoder to the electronic board.
e washing operation has 10 cycles. In each cycle two tips are used. e longest is used for suctioning and the
shortest for dispensing.
• Cycle 1(26): e reaction mixture is suctioned and the washing solution is dispensed. e suctioned waste is
sent directly to the high contamination waste bottle.
• Cycle 2(27): e washing solution is suctioned and then dispensed again.
• Cycle 3: Wait cycle during which the wells are washed
• Cycle 4 to 6 (28): Rinsing, suctioning of liquid and dispensing of distilled water
• Cycle 7: Wait cycle
• Cycle 8: Optical checking of well
• Cycle 9(29): Suctioning of distilled water
• Cycle 10(30): Drying of well.
During the last two cycles, in the event of the tips colliding with the rotor, a sensor (21) detects this and stops the
operation.
e whole tip assembly is secured mechanically with a bolt (22).
e wash station has a built-in system for blocking the entry of light through the cover vents, part (25). is part is
always in a lower position, touching the cover. When the wash station is raised and lowered, part (25) is maintained
in its position, making contact with the cover, by means of guide elements (23) and springs (24).
e wash station tip assembly is joined to a shaft (31). is shaft is dragged by a belt (37) through part (34). In
turn, the motor (38) transmits the movement to the belt (37) through the pulley (39).
e transmission pulley is protected by part (40).
e tab (35) and photosensors (36) are used to detect the wash station start-up position.
23
To Next Page
Loading...
