3.2.3.3 Switchable focus position
As an alternative to the auto focus function, the focus position can also be changed
dynamically and therefore cover a big read area.
A maximum of eight read areas can be defined internally as distance configuration for
this purpose and can be approached by the optics in any order in read mode.
1 2 3 5 84 6 71
AK2
AK3
AK4
AK5
AK6
AK7
AK8
AK1
AK = distance configuration
Focus position
Reading distance
Reading distance
Reading
field
height
Focus
position
Figure 7: Focus switching - dividing the total read area into distance configurations
The switching of the focus is carried out by the changing object distance (e.g. during
reading from the top: object height detection).
Trigger sources for switching are:
– Signal on switching input “Sensor 2” for the max. 2-level switching
– Command to the host interface or the integrated timer (e.g. for search run) for the
max. 8-level switching
– Oscillating mirror turning points for deflection on both sides in the case of the line
scanner with oscillating mirror
The distance configurations are assigned to the switching order via a programmable
assignment table.
NOTE
The SOPAS-ET configuration software can be used to configure the focus position:
•
Project tree, CLV6xx, parameters, read configuration
•
Project tree, CLV6xx, parameters, read configuration, oscillating mirror
•
Project tree, CLV6xx, parameters, read configuration, focus control
3.2.3.4 Oscillating mirror control
In the case of a line scanner with oscillating mirror, the position of the scan line is influ‐
enced by the configuration of the oscillating mirror.
In addition to the “Park” (fixed, adjustable position of the scan line) or the continuous
oscillation (irrespective of the read cycle), optimized function processes related to the
read cycle are also possible in the controlled operation of oscillating mirror:
– n-times oscillation around an adjustable start position within the read cycle
– One-Shot: single deflection (approach and return) per read cycle from an adjusta‐
ble start position
PRODUCT DESCRIPTION 3
8014396/ZMG8/2017-07-04 | SICK O P E R A T I N G I N S T R U C T I O N S | CLV69x
17
Subject to change without notice