Section 2-- Identification and Function of Parts 2-29
© 2008, Satake USA Inc.
(ALL RIGHTS RESERVED)
When the ScanMasterII is configured with five-channel chutes (two ejectors per
channel), alternate software is installed on the Ejector Interface PCB so that ERN
process combines the firing rates from each pair of ejectors and adjusts the trip
sensitivities for each pair of channels.
The fundamental assumptions of the system are that the defects are evenly
distributed and that the flow rate through each channel is the same. The first step
in system set-up is to assure that the flow rate through each chute is the same (See
paragraph 3.2.8). After flow rates are normalized, set the MODE to OFF and adjust
amplifier gains for all chutes/views to obtain even firing rates. After this manual
set-up is complete, select CHUTE or FEEDER mode to begin automatic operation.
After the system has been in operation for about 30 minutes the channel-by-channel
adjustments should result in even firing. When the system is turned off, these
adjustments will remain in memory and will be used as the starting point when the
system is restarted. To clear the memory (remove the channel-by-channel
adjustments) turn the Ejector Test switch on the Ejector Interface PCB from “off” to
“on” five times in succession. This may be necessary when making a product
changeover if the flow balance between the chutes has been changed.
The performance gained by using the ejector rate normalization feature depends on
the type of product being sorted, and the feed rate. Tests should be conducted in
CHUTE and FEEDER modes to determine the best mode for a particular application.
The system monitors the adjustments to the trip levels for each channel. The
graphic on the ERN SCREEN shows the conditions for the group of channels selected.
The amplifier gain potentiometers are depicted, and the view containing the master
channel will be shown with a box around it. For any chute adjustment that has run
out of range, the potentiometer will be shown in red, and the direction of the
adjustment required to bring it back into control will be shown. To make this
adjustment, open the upper electronics enclosure and turn the gain pot
approximately one-eighth of a turn in the direction indicated.
Graphs for the front and rear views show the trip levels for each channel. The
number of trips for each channel/view (yellow for the front and red for the rear) is
shown in a bar graph.
The Trend Track chart shows the total ejector fires for the ten valves of each chute
by ten-second intervals over the last three minutes. This information can be useful
in balancing between chutes, and in judging the impact of a gain or sensitivity
adjustment.
2.10 MAINTENANCE1 SCREEN (See Figure 2-15)
The MAINTENANCE1 SCREEN displays a log of fault conditions. The fault is logged
automatically, along with the date and time that it occurred. The system stores the
most recent 100 faults. To review the list of faults, use the scroll bar on the right
screen. The comment field on this screen can be used to record corrective action
similar to the entries on the MAINTENANCE2 SCREEN.
2.11 MAINTENANCE2 SCREEN (See Figure 2-16)
The MAINTENANCE2 SCREEN displays a Maintenance Log of user entries. This can be
used to record service, log changes, or communicate setup information. To make an
To Next Page
Loading...