PCB News - PCBA visual inspection is poor

PCBA visual inspection is poor
Manufacturers and suppliers in the electronics industry rely on machine vision solutions to solve the most difficult production and packaging challenges while meeting stringent safety and quality requirements.

Vision sensors, vision systems and image code readers can meet the most difficult application requirements in electronic materials, semiconductors, components, integrated circuit (IC) packaging and electronic finished equipment.

Supported by superior vision technology and rugged hardware, machine vision can eliminate defects, verify assembly, and track and collect information during the production cycle, helping users maximize quality, yield and traceability.

PCBA processing generally goes through cutting, brushing, pattern transfer, inner layer etching, AOI inspection, target position hole, blackening, lamination, target position, drilling, deburring, electroless copper, plating, wiping, and external Light imaging, exposure, development, pattern plating, outer layer etching, AOI inspection, wipe board, solder mask characters, spray tin, shape, point test, final inspection, Osp coating, packaging and other dozens of processes. For the stability of PCB board function, PCB surface defect detection requires high detection accuracy and reliable lighting effect.


According to project testing requirements, the light source must meet the following conditions:

1. The light source has sufficient brightness to meet the extremely short exposure time of the camera.

2. The light source has sufficient luminous direction, the illumination obtained at each position is uniform, the surface of the object to be measured collected by the camera is uniform, the details are clear, the contrast is high, and there is no bright spot and glare.

3. The side of the light source is designed with threaded fixed installation holes.

4. The light source has an efficient heat dissipation device, which provides good heat dissipation for the light source to work 24 hours a day, which can ensure that the light source brightness attenuation is within a small range within a year, during which there is no need to frequently adjust the brightness.

5. The light source controller is a constant current controller, which can ensure a constant current output, and the constant current accuracy is as high as 1% to ensure the brightness of the light source is stable.
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