Electronics Forum | Fri Sep 27 08:45:47 EDT 2002 | pr
Chevron marks are sets of lines (at right angles, on either side of component) placed on the board to help verify placement (we used it on BGA's) since you can't look at lead to pad to check placement accuracy. That's the only time I've seen it used.
Electronics Forum | Fri Sep 27 10:54:55 EDT 2002 | yngwie
Thank you pr. It was much appreciated. Is this mark normally act like a global fiducial/local fiducial for mBGA ? Is this a standard mark that can be read by the placement machine? what is the typical size of this mark ? are they masked ? thank y
Electronics Forum | Fri Sep 27 10:03:21 EDT 2002 | francoiscal
Is there any body that would have the specifications for the novastar model 1000 in there plant. We seem to have vanish this document from the plant. I went on the Novastar web site but this is an old model. So if anybosy would have this document it
Electronics Forum | Tue Oct 01 10:54:40 EDT 2002 | davef
As an alternative, consider contacting a used equipment broker or reseller. Many keep copies of manuals in their library in case they buy a machine for resale that doesn't come with a manual and their customer insists on have one. Search the fine S
Electronics Forum | Tue Oct 08 09:51:10 EDT 2002 | larryk
Russ, I use the R562, it has a longer tack time then the Hm531 and have found no problems with voiding on my BGAs. You may want to evaluate this formula also Larry
Electronics Forum | Tue Oct 08 18:54:04 EDT 2002 | BobbyB
Hey Russell. The boys at Air-Vac Engineering can help you solve your problem. Are you using an DRS system. If not, you are probably out of luck and should scrap the boards. Cheers!
Electronics Forum | Wed Oct 09 17:44:46 EDT 2002 | alj
I guess you don't use one. Call them and I'm sure they will solve your problems and teach you a little bit about BGA rework profiling... CHEERS!
Electronics Forum | Tue Oct 01 08:12:54 EDT 2002 | madreindeer
Hi, Have anyone done STSOP32 circuit with 0,5mm pitch with wave? or anything simular. Thanks for advance, BR, Mr.T
Electronics Forum | Tue Oct 01 12:23:26 EDT 2002 | barryg
We are looking at possible doing a few through hole components on the smt line. Is this feasable? What types of components are diffucult to do this way? What stencil considerations are there? Anyone have any info on this subject?
Electronics Forum | Tue Oct 01 16:22:46 EDT 2002 | stepheno
You have to be sure the TH parts can take the reflow temps. A lot of time you willl have to get special components. We do some BNC's this way, but they had to be special order BNC's. There is more info in the fine SMTnet archives.
.png)
