What is the maximum height of components on the PCBs for a standard Conformal Coating AOI system?
|This can be critical so important to know due to the length of the machine required and the imaging technology used in the conformal coating AOI.
The first question to ask is are the PCBs 3D in nature or are very flat? This helps determine whether we use camera or parallax free scanning technology?
Parallax is defined as a displacement or difference in the apparent position of an object viewed along two different lines of sight, and is measured by the angle or semi-angle of inclination between those two lines.
How this relates to conformal coating AOI is that with a fixed camera or a standard scanner the camera is at a fixed point and the circuit board with its 3D components may have “shadows” where the camera cannot see down the side of the components. This can be seen in the two photos below.
Take a look at our Conformal coating AOI Parallax link here to understand the issues more.
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