Various different faults can occur during the population of printed circuit boards (PCBs). Manufacturers depend on being able to detect all these faults in the production process as early and reliable as possible in order to maintain their quality standards.
PCBs are to be checked for proper population prior to soldering. Several different classes of faults are to be detected in the case of different layouts: missing components, interchanged components as well as components which are reversely or not completely inserted. It is also important to provide an exact feedback in the event of faults, in order to be able to correct them as quickly and efficiently as possible.
After the population, images of the PCBs are taken by a camera and compared to reference images. Faults are identified and highlighted in colour for the operator.
By using AXON image recognition, the PCBs can be tested before soldering when no measurements of electrical characteristics are possible. Faults can be recognized much more quickly and corrected with less effort.