5-12 Calibration and Adjustment
4. Press the TEACH button until the Long Distance sensing function (F Ld ) is displayed.
See
Figure 5-14.
5. Move the
SET-ADJ-RUN switch to the RUN position to implement this setting.
5.11.1 Program Output for Look Down Configuration (ASPA,196581 Fiber Array)
1. Ensure no part is under the sensor lens. The sensor leading edge should remain parallel to the
rail insert.
! The reference digital value should be less than 250 (approximate value).
2. Move the
MODE switch to L (Light On).
3. Move the
SET-ADJ-RUN switch to the SET position.
4. Slide the carrier/board under the sensor. Momentarily press the
Teach button (1 sec) to teach
the board present condition.
5. Slide the carrier/board out from under the sensor. Momentarily press the
Teach button (1 sec)
to teach the board not present condition.
6. Move the
SET-ADJ-RUN switch to the RUN position to implement this setting.
" NOTE Low contrast applications (low-reflectivity, dark color substrates) may require
the amplifier to be re-taught for the board present condition. Alternatively, a
manual adjustment of the amplifier can be done. If required, move the
SET-ADJ-RUN switch to ADJ. Change the digital threshold level DOWN to
detect the board.
7. Digital threshold is the reflected value at which the sensor turns ON to detect the
carrier/board.
8. As a general rule, the "Board Present" digital value should be a minimum of 5% higher than
the background digital value. For example, if the background digital value (no board under
sensor) is 350, the "Board Present" minimum digital value must be 350 *1.05 = 368 for
reliable detection.
9. Verify that the
SET-ADJ-RUN switch is in the RUN position.
10. Test the sensor by moving the carrier/board into the fiber array. Verify that the output turns
on and is stable when the carrier/board is against the stop pin.
! The orange output LED should light when the carrier/board is in the path of the fiber
array.
! The LED should go off when the carrier/board is moved out of the array.
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