Gocator Line Profile Sensors: User Manual
Gocator Web Interface • 138
Setting Description
Camera Gain
Analog camera gain can be used when the application is severely exposure limited, yet
dynamic range is not a critical factor.
Digital camera gain can be used when the application is severely exposure limited, yet
dynamic range is not a critical factor.
Dynamic Exposure
Sensitivity controls the exposure that dynamic exposure converges to. The lower the
value, the lower the exposure Gocator will settle on.
The trade-off is between the number of underexposed spots and the possibility of
over-exposing.
Threshold is the minimum number of spots for dynamic exposure to consider the
profile point that make up the spot valid. If the number of spots is below this
threshold, the algorithm will walk over the allowed exposure range slowly to find the
correct exposure. Because this is slow, the Threshold value typically should be kept as
low as possible, so this slow search is not used.
These settings let you set tune how dynamic exposure settles on an exposure for a
scan. For more information on Dynamic Exposure, see Dynamic Exposure on page 131.
Alignment
Alignment procedures are required to compensate for sensor mounting inaccuracies or to set a Z
(height)reference plane. The alignment procedure also sets a common coordinate system for multi-
sensor systems, and determines the encoder resolution (if present) and the speed of the transport
system. (In many systems, the reference surface is a conveyor belt.)
Gocator sensors are pre-calibrated and ready to deliver data in engineering units (mm) out of
the box. Alignment procedures do not affect sensor calibration.
A Gocator can be in one of two alignment states:Unaligned and Aligned. An indicator on the Alignment
panel display UNALIGNED or ALIGNED, depending on the Gocator's state.
State Explanation
Unaligned The sensor or sensor system is not aligned. Data points are reported in sensor
coordinates.
Aligned The sensor is aligned using the alignment procedure (described below)or by manually
modifying the values under Transformation in the Sensor tab on the Scan page (for
more information, see Transformations on page 128). Data points are reported in
system coordinates.
Alignment State
Once the alignment procedure has completed, the derived transformation values are displayed under
Transformations in the Sensor panel.
Alignment Types
Gocator sensors support two types of alignment: stationary or moving.
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