Comparison of operation interface between domestic AOI and imported AOI

　　 Due to the different design concepts, there is a big difference between the domestic AOI and the imported AOI in the operation interface and program design. The specific situation is as follows:

1. Imported AOI products all use foreign language interfaces on the operation interface, so the operation is very laborious, and there are higher requirements for the quality of the operators. Therefore, the production cost of the manufacturer is artificially increased, and the equipment itself is maintained. It also brings a lot of inconveniences, is not conducive to the reduction of production costs and violates the principle of simplicity of production equipment operation. Domestic AOI products have both Chinese interface and foreign language interface, which can flexibly adapt to different operating groups, and the operation is simple and fast.

　　2. Due to the complexity of program design, imported AOI products are not conducive to the training of production staff, artificially prolonging the training time for operators, increasing the training expenses of the production unit, and wasting human resources. In practice, it takes about two months to train a skilled worker for imported products, while domestic AOI only needs one week of training, and the operator can fully grasp the essentials of AOI operation. It takes a week for the program to install imported products, while domestic products can be completed in only three hours.

　　3. The image processing of imported products is generally processed by a combination of methods such as “image matching” and “rule discrimination”, and the identification of components is completed by the comparison of the recall and import of the component library. This not only takes a long time for debugging, but because the image combination is used for comparison processing, the misjudgment rate is quite high and the straight-through rate is very low. According to a survey by AOI Technology Network, a large processing company conducted the same through test on the AOI of the four imported brands used and the AOI of a domestic brand. The lowest through rate of imported brands was less than 40%, and the highest was only 100%. Sixty-one percent, and the domestic AOI independently produced and manufactured by the domestic electronic equipment factory, because of the use of independent intellectual property rights of vector analysis technology and image comparison methods, can quickly establish a stable and reliable test program, with a straight-through rate of 8% Twelve o’clock.

　　4. The display screen of the operation interface of the imported AOI product only displays the operation menu and a certain screen to be tested, which is not conducive to real-time monitoring of the welding screen. The display screen of the domestic AOI operation interface adopts the four-division system, which divides the screen into four, one is the operation menu, the other is the one-to-one overall screen of the tested object, and the third is The picture of the tested area is 1:20, and the fourth is the picture of the tested point of 1:40. This is not only conducive to real-time tracking of the welding quality of the device at the tested point, but also to adjust the test standard of the tested point. It is also conducive to the improvement of the straight-through rate of the inspected products, and it is also conducive to the analysis and tracking of the solder paste printing and device placement defects upstream of the production line, so as to check the defects in time and make necessary adjustments to the printing equipment and placement equipment. .

　　 2. Comparison of the performance of domestic AOI and imported AOI

　　 Domestic AOI and imported AOI have their own advantages in performance. The overall performance of domestic AOI is better than all imported products. The specific situation is as follows:

　　 1. Comparison of test accuracy

　　Imported AOI test accuracy (according to the imperial standard, the same below), at present, most of them can only test the welding quality of devices with a size of 0603 and above, while the inspection of products with a size of 0402 is inadequate.

　　2. Comparison of the deviation of the welded device

Imported AOI products usually set an inherent value in the program for the detection of the deviation of the device during the mounting process, as the criterion for discrimination, during the test, pass the standard and leave the non-compliant . This is not conducive to timely adjustment of standards for different production processes and combined with actual operating experience. According to the requirements of different production processes, domestic AOI can adjust the best test standards in time by continuously learning the image of the standard solder joints developed by the manufacturer. This is a very humane test procedure. Received unanimous praise from users.

　　3. Comparison of more tin and less tin in the soldered device

　　 For the detection of the problem of more tin and less tin when soldering devices, it is not a problem that AOI wants to solve. However, it is not an overnight problem to make an accurate judgment on this problem. This problem is mainly reflected in the use of “face-to-face comparative analysis” and “point-to-point comparative analysis”, especially for the inspection of the welding quality of IC products with small pitch (such as 0.4MM) and small devices below 0402 size. According to the analysis of the test report of a large-scale OEM processing company in Shenzhen, the four imported AOI equipment used by the company (AOI produced in Europe, America, Japan, and Taiwan) tested the IC pins with a small pitch of 0.4MM and small sizes below 0402. The judgment rate is quite high, especially when there is little tin, basically all misjudgments are made!

　　4. Comparison of short circuit (bridging, bridging)

　　 During the soldering process, the solder paste generated during printing has collapsed edges and too much solder, or the offset during device mounting is too large, which can easily cause bridging between solder joints, resulting in short circuits. Imported AOI products can only perform well for devices with sizes above 0603, while testing for devices with sizes below 0402 and products with a pitch of 0.4MM appears to be inadequate. The domestic AOI adopts a point-to-point test procedure with 80 times magnification, which not only solves this problem well, but also performs well in detecting the contamination of tiny particles caused by solder on the circuit board, even a hair Silk or even a piece of cashmere will not be let go!

　　5. Comparison of missing parts

　　 Missing parts are caused by the failure of the placement machine. Although this phenomenon is rare, it is also an important indicator to test the performance of AOI, and it is also one of the basic functions of AOI. However, the generation of missing parts is mainly manifested in small-sized devices. When inspecting the missing parts of devices below 0402 size, it appears to be frantic and somewhat powerless. The domestic AOI addresses this problem, no matter what size is missing, it will be doomed here!

　　 6. Comparison of test speed

　　 The improvement of test speed is one of the main points that all OEM manufacturers and electronic equipment manufacturers pay attention to AOI products. Because foreign AOI manufacturers have not solved the technical problem that the speed of point-to-point program testing is not easy to increase, they have given up this better testing technology, which has caused a lag in testing quality. Domestic AOI manufacturers have broken through this technical barrier, and as a result, the test quality has been qualitatively improved, and the test speed is much higher than that of imported products of the same grade. According to a survey conducted by AOI Technology Network, a private electronics company in Chengdu compared an imported AOI product of a certain European brand with an AOI product produced by Shenzhen domestic AOI. The test showed that the test time of the same circuit board is 82.21 seconds for the imported product. The product is 43.5 seconds, and the detection speed of domestic AOI is almost twice that of imported AOI! Imported products are not without faster AOI. According to a Taiwanese manufacturer, the detection speed of a desktop AOI product has increased, compared with domestically produced AOI. The AOI products are comparable, but the test quality is far from the domestic AOI!