Electronics Forum | Fri Dec 28 17:44:41 EST 2007 | flipit
Back in the mid 90s I used an SVS 3D solder paste inspection system. We used it as a stand along unit but it was an inline model. We would bring printed PCBs off the Dek 265 solder printers and check every 5 or 10 printed panels. They almost alway
Electronics Forum | Mon Feb 12 12:33:24 EST 2007 | SJ
There are several ways to inspect solder paste after deposition. Defects will range - too much paste, not enough, misaligned, bridged, smeared, etc. Some sceen printers have 2D inspection imbedded, otherwise a standalone system for paste inspection
Electronics Forum | Fri Dec 17 16:07:07 EST 1999 | Alex B
Hi, C.K. Let's assume that your stencil's thickness is in a range 4-6 mil or by other words the height of the solder paste on a pads is the same (close enough to reality) Therefore, for pad's width more than 20 mils(as well as pitch between pads) th
Electronics Forum | Mon May 07 09:47:45 EDT 2001 | orbotech
An ultimate truth in AOI is that "you can not avoid what you can not see". At the post solder stage, 2D inspection is typically not enough as it simply "can not see" everything using a single perspective, and therefore, can not detect all of the faul
Electronics Forum | Thu Dec 16 11:27:39 EST 1999 | C.K.
Hey Folks: I just want to get an idea how many of you use in-line or off-line visual inspection for solder paste deposition? At my company, we have one off-line, and it inspects for paste height. It's not always consistent either. Sometimes, it g
Electronics Forum | Thu Mar 07 12:33:39 EST 2002 | peterson
We are currently examining the issue of AOI machines (both in-line and off-line) It seems that the only positive remarks I find are written by the salespeople representing AOI manufacturers. Can someone please refer me to a more neutral source? My in
Electronics Forum | Mon Oct 09 14:30:44 EDT 2006 | Brian
I agree with Chunks. Programming was much simpler. The 2D inspection is much better on MPM. I didn't have to use offsets on the MPM or the DEK very often, but did more on teh DEK. I didn't like the front justified stencils on the DEK. I also did
Electronics Forum | Thu Apr 26 09:03:35 EDT 2007 | ck_the_flip
3d is good for initial verification that your screen printer and stencil is producing the desired paste height. 2D verification is more than sufficient during regular production. That being said, your best bet for a 3D machine is to go cheap - buy
Electronics Forum | Mon Nov 12 09:22:41 EST 2007 | devajj
BTW, The surrounded QFN fine pitch terminals > should have the normal aperture reduction of 7 % > in case of RoHS Senju solder paste. This works > for our Telecom customer. > > The vias in the > ground pad will be somewhat filled with solder >
Electronics Forum | Fri Mar 29 16:57:07 EDT 2013 | aemery
Gentlemen, Just became a member and scanning the old posts hoping to help people out with their MPM printers. Most of this info is correct, the last post was the best. Offsets on an Accuflex printer can be put in either per process program or glob
