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Appendix B: Troubleshooting Guide
Continuously Smeared, Compressed or Stretched Images
When accurate synchronization is not achieved, the image appears smeared in the scan direction.
If the EXSYNC pulses are coming too fast, then the image will appear smeared and stretched in the
machine direction. If the pulses are too slow, then the image will appear smeared and compressed.
Check the resolution of the encoder used to generate the EXSYNC pulses, along with the size of the
rollers, pulleys, gearing, etc. to ensure that one pulse is generated for one pixel size of travel of
the object.
It is also important that the direction of image travel across the sensor is matched to
the camera’s
scan direction, as
set by the user. See ‘Scan Direction’ in the user manual for more information.
If the scan direction is incorrect, then the image will have a significant smear and image artifacts in
the scan direction. Changing the scan direction to the opposite direction should resolve this
problem.
Refer to ‘Camera Orientation’ in the user
manual to determine the correct direction orientation for
the camera.
Note:
The lens has a reversing effect on motion. That is, if an object passes the lens-
outfitted camera from left to right, the image on the sensor will pass from right to left.
The diagrams in the user manual take the lens effect into account.
It is not always possible to establish the exact EXSYNC resolution or lens magnification to ensure
accurate synchronization. To alleviate this problem, the camera has a spatial correction feature
that can make fine adjustment to restore the alignment. (See section ‘Compensating for Encoder
Errors’ for details.)
Summary of Contents for ML-FM-16K07A
Page 17: ...Linea ML Multiline Monochrome HDR CMOS Cameras 17 Figure 8 Linea ML FM 16K Camera Mechanical ...
Page 18: ...18 Linea ML Multiline Monochrome HDR CMOS Cameras Figure 9 Linea ML HM 16K Camera Mechanical ...
Page 19: ...Linea ML Multiline Monochrome HDR CMOS Cameras 19 Figure 10 ML HM 08K camera mechanical ...
