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SP-2000/X-Y
If you are calibrating the sensors but not cleaning them, remove the window in
the North cover and start with step 3.
1.
Remove the three pedestal covers and thoroughly clean the sensors as
described earlier in this chapter Also, clean the targets using Fantastic, 409
or a similar type of household cleaner.
2.
When you disconnect the Stop switch harness as you remove each cover,
install a jumper plug to bypass the switch and allow the pedestal to be oper-
ated with the covers removed.
3.
Power up the pedestal, allow each wheel to initialize. Select Local on the
MCB controller and center the pedestal over the target. This will position
all three sensor assemblies over the target.
4.
Turn the rotary switch SW2 so that the index mark is on position 1. The
green RUN LED will turn off and the vertical row of LEDs is now func-
tioning as a light meter. The "light meter" has 5 yellow (DS10 - DS14) and
5 green (DS5 - DS9) LEDs. The space between DS9 (green) and DS10
(yellow) is the threshold for detecting the white and black areas of the tar-
get. The goal during calibration is to set each sensor so that its reading for
white (in the green region) and black (in the yellow region) is symmetrical
above and below the "threshhold" point.
5.
Press and release SW1, the DROP switch (located above the rotary switch)
to energize the solenoids and drop the sensors. After about three minutes,
the sensors will automatically retract . If the adjustments are not completed
by that time, simply press and release SW1 again to drop the sensors for
another three minutes.
6.
Select Rotate on the MCB controller and rotate the pedestal until the East
sensor assembly is over the black part of the target. Note which light meter
LED is ON - it should be one of the yellow ones since the sensor is detect-
ing black.
7.
Rotate the pedestal until the East sensor assembly is over the white part of
the target. Note which light meter LED is ON - it should be one of the
green ones since the sensor is detecting white.
8.
If the readings in steps 6 and 7 are already symmetrical, no adjustment is
required. For example, if the readings are the third yellow LED down and
the third green LED up, move on to step 10.
9.
However, if the readings are not symmetrical, adjust R1 until they are. For
example, if the reading s are the first yellow LED down and the third green
LED up, adjust R1 until the third green LED goes out and the second green
LED comes on. Rotate the pedestal between black and white and adjust the
pot until the sensor readings are symmetrical.
10. Turn the rotary switch SW2 to position 2 and repeat steps 6 through 9 for
the second East sensor, adjusting R2 if necessary.
11. Turn the rotary switch SW2 to position 3 and repeat steps 6 through 9 for
the third East sensor, adjusting R3 if necessary.
User Manual
Maintenance And Repair
4-27
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