Electronics Forum | Wed Sep 29 05:30:59 EDT 2010 | patejl
Hi We have a problem here in the company with AOI system, most of the problem is lifted lead on qfp components.We are using SAKI BF-planet-x. Most of the defects like mising components 603 or 402 are no problem but if it comes to lifted lead even
Electronics Forum | Tue Oct 05 02:57:41 EDT 2010 | patejl
Reese is right. We use algorithm our AOI but the make it find liftead lead on qfp or such... it took me all day to set program and even then some defects pass so that is why Im asking..
Electronics Forum | Sat Oct 02 10:49:36 EDT 2010 | tod1967
Yes it is possible to detect lifted leads with top view camera's. The camera's must be coupled with software that utilizes algorithm programs. MVP - Machine Vision Products out of Carlsbad, California uses algorithms in their software. Most AOI co
Electronics Forum | Thu Oct 14 02:27:54 EDT 2010 | patejl
Hello Pvasquez Well that is not a good news but it is what I thought. Lets see what will say our headquarters.Could you send me some more information or materials obout mirtec machines so I can present it to our company. Thanks
Electronics Forum | Tue Nov 02 15:51:10 EDT 2010 | pvasquez
Hello Patejl, Sorry, haven't been to the forum recently. Check out mirtec's website. There is some really detailed information there: http://www.mirtecusa.com. Chat with you soon.
Electronics Forum | Wed Oct 13 16:28:20 EDT 2010 | pvasquez
Hello Patejl, Many AOI machines have issues with lifted leads. I recall SAKI failed to catch lifted leads on my test PCB when I evaluated them. If you are looking for replacement equipment, check out MIRTEC. We now have four of these systems confi
Electronics Forum | Tue Oct 05 12:08:50 EDT 2010 | tod1967
I checked with MVP after Reese's comment, they use special color lighting in addition and have many customers detecting lifted leads successfully. It doesn't really matter unless your looking for a better AOI system/supplier. Hopefully your equip
Electronics Forum | Sat Oct 02 06:26:51 EDT 2010 | patejl
Thanks for your feedback, both of you. But my problem is that we have high mix and low volume its obout 50-200 pieces. And we also have manual paste priter so the solder on the pad look always diferent. I believe that there is the problem but I cano
Electronics Forum | Wed Sep 29 16:04:29 EDT 2010 | hegemon
In my experience, the best way to do a lifted lead inspection on a QFP is by laser height measurement. It is very difficult to consistently catch a lifted lead with only a top down camera. As you say, too many false calls, and still some escapes.
Electronics Forum | Tue Oct 05 12:29:28 EDT 2010 | mikesewell
It is possible to infer that the lead is lifted based on the toe fillet appearance, but it's not as reliable as say a laser or xray inspection. This is usually done by varying the light source location and or color and looking at the images resultin
