Step 10 - Position Object Detector; Figure 1-10 Detector Right-Angle Orientation; Figure 1-11 Detector Side Orientation - Microscan MS-615 User Manual

Chapter 1 Setup and Installation
10
Position Object Detector
If you are not using an object detector, continue with step 11.
In a typical operation, a scanner will wait for bar code data only during a
triggered read cycle. A read cycle is initiated by a "trigger" that can be in
the form of a serial command from the host (internal trigger) or a signal
from an object detector (external trigger).
When an object detector is used, it is set up so that its beam will bounce
off the approaching object and the resulting pulse will be sent to the scan-
ner to begin the read cycle. Typically, a detector is positioned so that it will
detect the presence of an object before the object's label can be scanned
by the scanner.
An object detector is mounted in
almost any position relative to the
object as long as (1) the object
passes within range of the detec-
tor and (2) direct or reflected light
from the detector does not inter-
fere with the scanner's reception.
As the item continues to move
down the line, its label moves into
the scanner beam and is read by
the scanner.
Figure 1-10 shows a picket fence
label being scanned with the
detector and scanner at right
angles to each other.
Figure 1-11 shows a label in the
ladder direction with the object
detector on the same side as the
scanner, but positioned so as not
to cause interference.
1-14
MS-610 Scanner User's Manual
Label
Detector
Scan beam
Direction of
MS-610
label travel
Scanner
Figure 1-10 Detector Right-Angle
Orientation
Direction
of label
travel
Dete ctor
Alternative
detector
M S-610 position
Scanne r
Label

Figure 1-11 Detector Side Orientation