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Top of Form (TOF) Sensor
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P1021708-001 TTP 2100 Operator Guide 11/04/2009
Top of Form (TOF) Sensor
The TTP 2100 has a flexible top of form detection system. When delivered the printer is
configured with fork (transmissive) sensor to detect holes/gaps between tickets. The
holes/gaps should be in the paper center, 12.5 mm to the right of the center (according to IATA
resolution 740) or at the edge of 82.5 mm wide tickets (Boarding cards).
If the TOF mark is at a suitable position, an auto calibration routine will configure everything
for you.
You can move the sensor to other positions, force the printer to use a specific sensor, switch to
reflex (black mark) sensor for black-mark detection by setting up the parameters in the printer.
Selecting Fork (Transmissive) or Reflex (Black Mark) TOF Sensor
The TTP 2100 can use a fork (transmissive) sensor that looks for holes between tickets, or a
reflex (black mark) sensor that looks for black-marks on the back of the ticket stock. Sensor
mode is selected with parameter n61, see Summary of Parameter Settings on page 83.
Positioning the TOF Sensor
The sensor board containing the lower media sensor sits on a bracket that can slide left and
right in a groove. This bracket is located below the ticket entry. The IR light source (upper
media sensor) sits on a similar bracket above the ticket entry. When delivered, the bracket is
positioned to the far right. In this position Sensor 1 is at the right side ready to detect the corner
radius of Boarding cards, Sensor 2 is at the center of the page, and Sensor 4 is 12.5 mm to the
right of the center at the position determined for baggage tags in IATA resolution 740. To
configure the printer for other papers that do not fall into any of the three categories, complete
the following steps:
1. Loosen the screw holding the sensor 1 ½ turns.
2. Press the screw in with the screwdriver and carefully slide it to the new position making
sure the cables to the sensor do not obstruct the movement.
3. Tighten the screw.
4. Move the IR light source (upper media sensor) to the same position, directly above the
sensor.
a3
Note • The standard ticket guides have holes for the following sensor positions: Center,
Edge, and 12.5 mm from center, and the sensor position must correspond to these holes.
Upper sensor
adjuster
Lower sensor
adjuster