Step 4 - Determine Raster Height And Arc (7180); Figure 1-3 Ms-7180 Raster Height - Microscan MS-7100 User Manual

4
Determine Raster Height and Arc
(MS-7180 only)
In setting up the MS-7180 raster scanner, raster height depends on the raster
arc and label distance (range) from the scanner. In
and raster arc are shown at their maximum with raster arc set to 45°. Both the
top offset and bottom offsets can be adjusted independently in one-degree
increments and the resulting arc can vary from 0° to 45°. (See
Menu" on page 2-37.
M axim um high
density range
B ottom offset set at 0°
(22.5° from perpendicular beam )
i n . 0
cm 0 10 20
Raster Height. If raster arc and label
range are known, raster height can be
derived by the following formula where Ø
is raster arc in degrees:
Raster Arc. If raster height and label
range are known, the raster arc can be
derived by using the following formula
where RH is raster height:
1. Raster Height and Raster Arc formulas assume a straight-on symmetrical arc.
MS-7100/7180 Industrial Scanner User's Manual
Determine Raster Height and Arc
figure 1-3
T op offset set at 0°
(22.5° from perpendicular beam )
M axim um low
density range
R ange
10 20 30 40
30 40 50 60 70 80 90 100

Figure 1-3 MS-7180 Raster Height

×
(
RH = 2
1
∅ •
= 2 atan
raster height
"Raster Setup
i n . cm
20
50
40
30
10
20
10
0
0
10
20
10
30
40
50
20
50
H eight
110 120
∅
 
)
----
ScanRange tan
 
2
 
RH
----------------------------------------
 
×
2 ScanRange
1-5