2. The mechanism is operated by a 24v DC 50 RPM motor. The motor is
connected to a pinion which engages with a rack on the dispense arm. This
mechanism is used to move the dispense head backwards and forwards.
3. A micro switch, fitted to the rear of the dispense head chassis detects the
home position (head withdrawn/not dispensing). An optical sensor is also
fitted and this works in conjunction with a decoder bracket attached to
the rack to determine the position of the dispense head.
4. A moulded dispense head mounted at the front of the unit connects the
tubes from the various mixing systems, brewers and hot water, to
separate dispense nozzles. The three positions of the despense head
ensure the required dispense nozzles are positioned over the cup.
N.B. An illustration showing the parts breakdown for the
Moving
Dispense Head is included in Section 13 - Spare Parts (page 169). Dispense
Pipe Lengths are shown in Section 11 (page 113).
7.6 Cup Dispense Unit
1. Cups (either paper or plastic) are stored in tubes which are located above
the cup dispense unit. The unit incorporates a 24v DC, 2.2 r.p.m. motor
for Indexing the correct turret over the cup drop unit as required.
2. When a selection is made the Main Controller checks that the cups are
not sold out, a 230v AC solenoid is energised and a cup is dispensed.
3. The cups are separated and ‘dropped’ by a cup ring. The cup ring
comprises six separator cams operated by a solenoid, which is controlled
by the vending machine controller.
4. The cup level is monitored by an electronic system. An infrared LED (cup
sensor transmitter) is positioned in the cup assembly above the cup
splitter, with an infrared detector (cup sensor receiver) mounted directly
opposite.
5. The light emitted by the LED is detected when NO CUPS are present.
With a stack of cups present, the beam is broken. As the cups drop below
the LED, transmitted light is detected. If this is the case, the controller will
index the cup tubes until a full stack is located. A turret location micro-
switch ensures that the cup tubes stop centrally over the cup ring.
N.B. The turret motor will run until the next stack is deposited into the
cup splitter, which breaks the LED beam, and the cup stack micro switch
returns to its normally open state. The motor will run until it either finds
the next stack or all the turret extrusions have been checked.
6. The cup stack index motor is protected by a time-out feature. The motor
will rotate for a maximum period of 60 seconds. If at the end of this
Technical Manual
79
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