Microscan MS-890 User Manual page 195

Starting Focus Position
Starting Focus Position can improve focus acquisition speed during calibration
Usage:
when the approximate range of the symbol is known.
With Auto Range enabled, the scanner will begin the calibration routine at
Definition:
the focal range set in Starting Focus Position.
Serial Cmd: <K510,auto
0
Default:
0 to 40
Options:
After you've used calibration and observed the progress of the first and second passes in
the graph and table in the Results tab, you should sense a relationship between focus
position and the distance to the symbol.
Improving the speed and accuracy of focus position setup:
1. Click on the Advanced tab in the Calibration menu.
2. If Auto Range is enabled, click on it to disable.
3. From previous results, estimate the value of Starting Focus Position and drop
down one or two positions.
For example, if you estimate the distance to your symbol to correspond to a Starting
Focus Position of 6, enter 5 or 4 to be certain of not missing the peak performance
distance.
4. Click the Calibrate button to start calibration.
5. Examining the read rates in the Results graph following calibration.
MS-890 Industrial Automation Scanner User Manual
range,starting focus position,focus step size>
Calibration
9-15