Microscan MS-890, User Manual

Page: 200 / 308

9-20
MS-890 Industrial Automation Scanner User Manual
Calibration by Embedded Menu
Calibration Results in Embedded Menus
To access Calibration Results menu from within the Calibration Setup menu, type the
numeral
1
.
The
Calibration Results
menu shows the results of the calibration process for
Read
Rate
,
Gain
, and
Tracking
for both the first and second passes. Note that the first pass
has only one reading for each parameter.
Focus Positions
In the example above, the focus position selected from the first calibration pass (position
26) represents the optimal focus position for Read Rate , Gain , and Tracking . The second
“fine tune” pass commences 3 focus positions in from this and steps out until the read rate
drops off to zero.
Focal Range
The algorithm selects the best focus position ( SET ) as the midpoint between those positions
( IN and OUT ) at which read rates drop off by no more than 6-2/3 percent of the maximum
read rate. For example, in the above menu, the read rate for focus position 24 is 73. Since
73 is more than 6-2/3% below the maximum read rate of 100% shown elsewhere, the IN
range falls under the next focus position, 25. A mirrored calculation is performed to locate
the
OUT
focal range.
Press the enter key ( CR ) to return to the main calibration menu or ESC to leave the Auto
Calibration Setup menu entirely.