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The Cause Of Visual Inspection Errors Of Components Caused By SMT Placement Machine.

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The Cause Of Visual Inspection Errors Of Components Caused By SMT Placement Machine.
Latest company news about The Cause Of Visual Inspection Errors Of Components Caused By SMT Placement Machine.

SMT placement machine is prone to mismatch when attaching components. Visual inspection error of components is one of the main reasons leading to misplacement. What factors cause the visual inspection error of components?

1, the influence of the foreign object on the lens, the glass lens above the aperture, the effect is to prevent dust into the aperture and influence the intensity of the light source, but if there are dust, components and other foreign objects on the glass lens, the intensity of the light source is affected. If the intensity of the light source is low, the gray value is low. This leads to bad recognition, so the placement machine should pay attention to the cleaning of lenses and lenses.

2, the impact of the reflective plate, the reflective plate plays a role in the backlight. When there is dust on the reflector, the intensity of the light source will be reduced and the gray value will be reduced, which causes the bad recognition and the loss of the components. So, the reflective plate is the part that needs to be periodically polished when the patch machine is maintained.

3, the influence of the light circle light source, the light source intensity will gradually decrease after a period of use, because the intensity of the light source is proportional to the gray value of the solid-state camera conversion, and the larger the gray value is, the closer the digital image is with the observed view, so with the decrease of the intensity of the light source, the gray value is also reduced accordingly. But the gray value of the machine will not decrease with the intensity of the light source. Only the regular correction detection is only proportional to the intensity of the light source. When the intensity of the light source is weakened to the unrecognized element, the bulb needs to be replaced.

4. The parameters of the component library are not set properly. This is usually caused by the disshape of the element's shape when the material is changed. It is necessary to recheck the parameters of the identification parameters and check the items including the shape and size of the components. The solution is to let the visual system "learn" the configuration of the component, and the system will automatically produce a comprehensive description of the CAD, which is efficient and effective. Size consistency is not good, may be appropriate to increase the allowable error.

5, sound absorption of the mouth, when the backlight recognition, if the suction mouth shape is larger than the device contour, the image will have the outline of the suction nozzle, the recognition system will take the outline of the suction nozzle as part of the element, thereby affecting the element recognition. In view of this phenomenon, we can handle it based on specific reasons.

A, if the outer diameter of the suction nozzle is larger than the size of the device, replace the nozzle with smaller outer diameter.

The position deviation of B and suction nozzle causes the shape of the suction nozzle to extend to the device profile and adjust the material level deviation. The high performance SMT patch machine has the function of automatically correcting the position of the element. By continuously measuring the location of a component, the average error is calculated and the correction value is automatically produced. The corrected value is stored in the Feeder (B) Offest. The zero value of the material position can solve the problem.

Pub Time : 2018-11-27 13:43:15 >> News list
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