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The continuous stream of encoder trigger pulses synchronized to the object motion establishes the
line rate. The faster the object's motion is, the higher the line rate. The Piranha XL camera can
accommodate up to its specified maximum frequency. If the maximum frequency is exceeded, the
camera will continue to output image data at the maximum specified. The result will be that some
trigger pulses will be missed and there will be an associated distortion of the image data. When the
line rate returns to below the maximum specified, then normal imaging will be reestablished.
Seamless Stop and Start Imaging
The Piranha XL camera can accommodate the full range of line rate frequencies—from the
maximum specified to a stopped condition. No line artifact is generated as the line rate approaches
and reaches the stopped condition and starts up again in the same direction (the PX-HM-16K06X-
00-R model only). Care must be taken that at no time does the object go backwards, even for a
single line, as it comes to a stop and starts up again. If a momentary backwards motion occurs
when stopping and starting, the result may be a blurred image for a few lines.
Internal Trigger Mode
See the section Camera Control Category in Appendix A for GenICam features associated with this
section and how to use them.
Relevant Feature: Internal Line Rate
The internal trigger mode does not have much use in the normal inspection system environment,
as TDI imaging requires an accurate synchronization to the objects motion. However, the internal
mode can be very useful when a stationary target is used for camera evaluation or debugging
issues.
Measuring Line Rate
See Camera Control Category in Appendix A for GenICam features associated with this section and
how to use them.
Relevant Feature: Measured Line Rate, Refresh Measured Line Rate
The camera has the means to measure the line (trigger) rate that is currently being applied to the
trigger input of the camera, or what is being internally generated. This is not a continuous reading
but a one-time measurement that needs to be initiated by the user with the Refresh Measured Line
Rate command.
22 •
The Piranha XL XDR Camera
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