11 ALIGNMENT
Device is provided with sensors for the use of alignment notch in order to handle:
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The alignment notch may be formed by (see par.8.10):
• black mark printed on paper;
• hole between two tickets;
• gap between two labels (only for models without triple feeder).
The presence of the notch is therefore detected by the amount of light that returns to the sensor, considering that the light
To use tickets with holes or labels with gap, it is possible to use the same sensors as “transparence” sensors, coupled two
by two: a beam of light is emitted by the transmitter sensor and the quantity of light which reaches the opposite receiver
sensor is detected.
The presence of the hole/gap is detected evaluating the amount of light that arrives to the opposite sensor, considering that
the paper doesn’t allow the beam of light to reach the receiver, whereas a gap or a hole lets the light to reach the receiver.
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