Automatic Inspection Equipment

There are two kinds of automatic inspection equipment was used in our company in China. One is MVT GS-1 another one is VI2000. We put it in line before reflow oven for quality control. It's very useful and average 1-2 DPHU reduction compare with non inspection equipment line.

Hope it's help

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I think you could look at the phenomena in two dimensions. Many of the sub-contractors in Asia are focus on low price-less demanding products. They hire operators to visually inspect the boards and sometime there is no inspection at all. On one hand, these products use medium size components (which allow inspection by operators). On the other hand, they are normally not high value products (the labour rate in Asia is still low enough to justify inspection by operators). I think AOI will be useful only if you were able to control your process. What I meant is that AOI could tell you which parts of process has gone wrong (by SPC on all the error found in the board). From this information, you could go back to adjust your P&P machines, printers, etc.

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MVT? When you feel your program is complete run a bare board through the system and please post the results of the inspection.

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DEAR FRIENDS. I APPRECIATE THE SANJEEVS COMMENT . LOOKS LIKE EVERYONE WENT IN SEARCH OF MVT RATHER FOCUSSING ON ABOUT THE AOI. ANY WAY....

I to some extent agree with Alex on the asia scene where the subcontractiung process is very cost competative but in order to be in business and continue to flourish and be acceptable to morenumber of corporates who outsouce going in for aoi is a must. but EOL (END OF LINE ) may not be really productie as false failures and added to rework cost may be very high hence prereflow may be best suggested provided the reflow you have is one of the best in the world.

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Hi! I just wanted to shortly share my experience with AOI machines. We have a VisionPoint from Diagnosys (Same software as in the Photon dynamics machines) and the machine is doing it�s job really good actually...BUT! The machine building quality is rahter low. Nuts n bolts are not tensioned correctly, and the cable crimping was really bad wich caused a number of strange behaviours of the machine. And the software sometimes just crasch while inspecting the board. But back to the AOI process itself:

The machine eliminates our P&P and reflow problems really smoothly. if our P&P is not correctly calibrated I can quickly shout STOP!! We correct the problem and keep on running. That saves big cash. Fact is that it also gives us an inner calm if we just are mounting the boards, and our customer is testing them. Because we don�t want to se those bad bad test reports our customer will send us if we didn�t have our AOI. So we like the AOI process big time! Have a nice weekend lads! //MattiasW

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