Section 2-- Identification and Function of Parts 2-41
© 2008, Satake USA Inc.
(ALL RIGHTS RESERVED)
2.16.4 STATUS
When Ejector Rate Normalization is in the off mode, the seven-segment display
shows the number of active views. For example, if the ScanMasterII is set up as a
two-view sorter, and it has properly configured itself at start-up, the number “2” will
be displayed. When Ejector Rate Normalization is active in either the CHUTE or
FEEDER mode, no number will be displayed, but the decimal point will blink.
2.17 EJECTOR CONTROL PCB
The Ejector Control PCB controls the signals going to the Ejector Driver PCB. Each
Ejector Control PCB controls four Ejector Driver PCB's. There are no adjustments on
this PCB.
2.18 EJECTOR DRIVER PCB (See Figure 2-23)
Each Ejector Driver PCB has the circuitry required to drive ten ejectors. The signal
that activates a particular ejector driver circuit is available at test points TP1
through TP10. An oscilloscope may be connected to the test point to verify the
Delay and Dwell circuitry for that particular ejector channel. LED's DS1 through
DS10 will blink yellow when the ejector driver circuit corresponding to that
particular LED has been activated.
LED DS11 will illuminate red if there is an electrical fault with any ejectors
corresponding to this PCB. The LED will be ON if the ejector power is not on (as
during start-up), or if an ejector fuse is open on the Ejector Connector PCB
corresponding to the Ejector Driver PCB (See Figure 2-28).
Resistors R3 through R12 are protected by thermal switches that will open in the
unlikely event of overheating. If this does occur, it is usually due to very high
ejector firing rates. The switches will close again after cooling. If a thermal sensor
activates due to overheating, LED DS11 will illuminate red and the corresponding
ejector driver circuit will be disabled.
If the sorter is handling large product, and is fitted with 5 channel chutes, switch S1
should be in the “dual” position. This will allow ejectors 1 and 2, 3 and 4, etc. to
fire in pairs.
2.19 BACKGROUND CONTROL I/O PCB (See Figure 2-24)
The Background Control I/O PCB controls the position, and thus the apparent
reflectivity of the background(s). It does not automatically
match the reflectivity of
the background to the product.
LED DS1 for the front view background (located in the rear viewer cabinet) will
normally be illuminated green. If the background is directed by the control
computer to move to a new position, the LED's will illuminate red until the
background has reached its new position. The LED will then return to green. The
voltage at test point TP1 is a measure of the front background position. LED DS2
and test point TP2 perform the same functions for the rear view background
(located in the front viewer cabinet).
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