Programming The Contrast Sensor - Avery Dennison SNAP 700 User Manual

User's Manual—SNAP™ 700 Printer

Programming the Contrast Sensor

The figure below shows the control panel for the Contrast Sensor. The sensor can detect a
light sense mark on dark material (L) or a dark sense mark on light material (D). In each
mode, the control switch can be set to RUN or TEACH.
To teach the sensor, thread the printer with the stock to be used. Position the material so that
a sense mark is just to the left of the sensor position. Adjust the sensor position across the
web so that the sensor lines up with the sense mark.
Set the control switch on the sensor to the TEACH position. If the material has a light sense
mark on dark material, set the switch to TEACH L. If the material has a dark sense mark on
light material, set the switch to TEACH D.
Press and hold the TEACH button while using the stock advance knob to move the sense
mark under and past the sensor.
Release the TEACH button. If the Q light flashes rapidly, the sensor did not program
correctly. If the process fails repeatedly, the sensor may not be lined up correctly with the
sense mark, or there may not be enough contrast between the background and the sense mark.
Move the material so that the sense mark moves back and forth under the sensor. The Q light
on the sensor should flash when the sense mark passes under the sensor.
Move the configuration switch to either the RUN L or RUN D position, depending on the
sense mark.
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Make sure that the stock is tight against the web guide. The
best way to do this is to press the TEACH button with the left
index finger, while applying back tension to the supply roll
with the left thumb. This ensures that the stock is in the same
position that it will be when the printer is running.
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