Question 2:
Can I run a vision inspection system at 800 ft / min?
Answer to question 2:
You may run at this high speed, but the maximum speed strongly depends on the resolution that you require for inspection. Let us give some examples:
800 ft / min correspond to 160 in. / sec.
If you use an area camera with 1000 x 1000 pixels that covers 8 inches on the web at a resolution of 128 dpi, the camera has to take at least 20 frames per second. As your printed features (labels) are typically much shorter you may even require more frames per second. These requirements certainly exceed the limits of modern area cameras with resolutions greater than 1000 pixels square.
If you use a line scan camera with 2048 pixels that covers 8 inches you look on the web at a resolution of 256 dpi and you will obtain a line scan rate of about 40000 lines per second. This is probably right at the limit of today's line scan technology. Consider that the resolution of the line scan camera in this example is assumed to be double the resolution of the area scan camera.
A vision inspection system featuring a high-speed line scan camera would therefore be able to run at the desired speed of 800 ft / min and still provide an acceptable inspection accuracy.
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