Chromasens CD40127_R02 allPIXA_pro_User Manual.docx
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5.4 Preventing installation errors
To ensure a high image and color quality, it is essential to align the camera correctly with the
conveyor belt.
If the camera is misaligned, image artifacts may result.
5.4.1 Conveyor belt tracking
Make sure that the conveyor belt, on which the object is transported, runs completely straight.
In the left-hand section of
Figure 24
you can see the optimum tracking of the conveyor belt,
i.e. the conveyor belt runs completely straight. The enlarged view shows that each of the three
pixels highlighted in black acquires the same point on the object.
In the right-hand section of
Figure 24
you can see a situation in which the conveyor belt runs
untrue and oscillates in a lateral direction to the transport position and then each line acquires
a different area of the passing object. Consequence is that the image generated by the three
color lines is not aligned, resulting in chromatic aberration which occurs laterally to the
transport position.
Figure 24: Optimum conveying belt tracking
5.4.2 Perpendicularity of the sensor to the direction of transport
Make sure that the allPIXA pro camera is aligned at a right angle to the direction of transport.
you can see the optimum alignment of the camera, i.e. it
is aligned perpendicularly to the direction of transport. The enlarged view shows that each of
the 3 pixels highlighted in black acquires the same point on the object.
you can see one situation in which the camera is not
aligned perpendicularly to the transport position and then the same point on the object is
imaged at different positions on the trilinear sensor. Consequence can be that the image
generated by the 3 color lines is not aligned, resulting in chromatic aberration on the image.
