Step 3 - Calculate Number Of Scans; Figure 1-3 Ladder Orientation; Figure 1-4 Picket Fence Orientation - Microscan MS-615 User Manual

Chapter 1 Setup and Installation
3
Calculate Number of Scans
To ensure reliable scanning, we recommend that you apply a minimum of
five scans to each label. Use the formulas below to calculate the number of
scans that your label will receive. For definitions of terms, see inset on
page 1-5.
If the number of scans you derive from one of these calculations is less than
the minimum for your application, plug in the minimum number of scans and
solve for another parameter that might be changed, such as label speed or
scans per second.
Ladder Calculation

LH
×
------- -
SR

LS
Where LH =
Example 1:
LH =
LS =
SR =

1.5
------ -

10
Picket Fence Calculation

SW LL –
-------------------- -

LS
Where SW = Scan Width, LL
LS = Label Speed and SR
Example 2:
LL =
LS =
SW =
SR =

3 1.5 –
--------------- -

10
1. The -3 component in the formula is included to allow for AGC acquisition, an incomplete first
scan, and an incomplete last scan. This applies only if the number inside the parentheses
equals 4 or more. If the number equals 3, then only subtract 2 to derive 1 good scan.
1-4
MS-610 Scanner User's Manual

1
– 3 = number of complete scans

Label Height, LS = Label Speed, and SR
1.5 inch
10 inches per second
200 scans per second

×
200 – 3 = 27 complete scans


×
SR – 3 = number of complete scans

= Label Length,
= Scan Rate
1.5 inch (including quiet zones)
10 inches per second
3 inches
200 scans per second

×
200 – 3 = 27 complete scans

(EQ 1)
= Scan Rate.
Direction of label travel
Scan Line

Figure 1-3 Ladder Orientation

1
(EQ 2)
Direction of label travel
Scan
Line
Figure 1-4 Picket
Fence Orientation