JUKI KE-1070 SMT part

I: Intensity, showing brightness

1E3C-E-OMB04-A03-00 Provide adequate facilities or wear appropriate protective equipment to avoid in-halation and direct contact with the eyes, skin, and clothing. Composition change during use may result in combustible material with a flash point.

.2 ..LUT (Lookup table) The purpose of the color image processing is to detect the target (here, the printed solder), based on its color and brightness information. To detect it, it needs to be extracted from image, based on its color and brightness information predetermined individually. To extract the target from a monochrome image, which has only brightness information, on the basis of the brightness, a binarization process is used. In this case, based on some determined threshold value, any value under the threshold value is converted into 0, and any value greater than or equal to that is converted into 255. When the target is bright, the pixel value always becomes 255; therefore it can easily be extracted from image. LUT has the same workings as the threshold value used for binarization. Through LUT conversion, the value of the pixel that has the color and brightness you want to extract is converted into higher one, and the value of the pixel that has different color and brightness is converted into lower one. After the LUT conversion, a high-value pixel area indicates a target printed solder. Therefore, as long as this area is a target, the inspection will be carried out properly.

As stated above, LUT is a data in which individual color and brightness information is set. In our company, each of HSI is converted into 8-bit numbers (0 to 255), and each of the numeric values of the four points (see Fig.1) on the rectangle surrounding a histogram is regarded as LUT data. To make the expression common, we refer to the LUT data as the color data.

Fig.1

255-value starting point 255-value end point

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It is represented by the horizontal axis H (left to right, 0 to 255) and the vertical axis S (bottom to top, 0 to 255) of the color-gradation window, and I (left to right, 0 to 255) of the gray-gradation window. The color-gradation window displays a yellow and a white square, and also the gray-gradation window displays a yellow and a white square (the height direction is full-size fixed). Every time HSI is adjusted, the square-frame size and location change. Each of the two 255-value points is represented in yellow, and each of the two multi-value points is represented in white.

Page 4-40 1E3C-E-OMB04-A03-00 4.7 Before Solder Inspection (For SP80V) Local exhaust ventilation system, closed facilities, or total ventilation.

. Solder-sampling test screen Based on the color data determined at the color-setting screen, the solder-sampling test is carried out for whole screen. Not established

[Recognition]....... The solder-sampling test is carried out for whole screen. Solder-sampled targets (Printed solder, in this case) are displayed in white.

This concludes the color-sampling teaching.

After the teaching, the screen returns to the solder inspection teaching menu.

1E3C-E-OMB04-A03-00 Page 4-41 4.7 Before Solder Inspection (For SP80V)

4.7.4 About Gauging Teaching

(When teaching is complete successfully)

1. Press [Solder pos. teach]. Page A-5

. The automatic teaching screen is displayed, and inspection-frame automatic teaching (teaching of all the apertures in all the fields of view) is carried out.