Electronics Forum | Wed Jun 05 17:14:40 EDT 2002 | davef
First, I suggest that people search the SMTnet Archives in just about every response that I make. Second, you need to work on your DOE jargon * Factors. Independent or input variables * Effects. Results. Dependent or output variables. Third, the
Electronics Forum | Mon Feb 19 10:55:14 EST 2007 | John S.
We're looking into a new profiler and potentially one of these wave rider tools. I found some old threads, but nothing very recent. We tried the Malcolm tool a long time ago, but we weren't very happy with it. I'm sure I can get a demo unit and co
Electronics Forum | Mon Apr 26 15:04:14 EDT 2004 | pjc
You are correct in understanding that the vision system comes into play for subsequent boards- to align them. Yes- if you missalign the first board and set the cameras to that board, all subsequet boards will not be aligned. Mylar is a thin polyester
Electronics Forum | Wed Aug 15 18:48:58 EDT 2001 | mparker
I would consider the fab placement in the printer to be of more concern than the pro's and con's of a single foil for top and bottom print. Do to the larger size of the fab you will have to align the top and bottom layers sequentially on the foil. O
Electronics Forum | Fri Dec 30 11:54:53 EST 2005 | John S.
Seen cap cracking before. It can be caused by thermal stress as noted above, but don't discount mechanical stress and handling. Your depanelization method is a strong candidate. We applied strain gages to baords and benchmarked various mechanical
Electronics Forum | Thu Sep 21 05:46:34 EDT 2000 | Wolfgang Busko
Once you know what your print should look like, means you have found the right apertures, stencil thickness, stencil finish and the right printer adjustments and alignments, the main things to watch for or better to control when printing is in progre
Electronics Forum | Thu Aug 09 12:36:26 EDT 2001 | Michael Parker
Adam- Mikie here. I too am placing 2 PBGA sockets on an assembly but they aren't mirror imaged. Thanks to the SMT Gods for that one. You say you added more paste to solve for open solder. Do you have x-ray? Were the alignments perfect? Also the part
Electronics Forum | Thu Aug 27 13:56:27 EDT 1998 | Stefan Witte
| Where can I find a good tool to splice 8mm and 12mm paper and plastic part carrier tapes together? Siemens has a pretty good splice tool, which crimps a small brass strip into the tape. The cover tape has to be sticked together with a small strip o
Electronics Forum | Fri Aug 04 10:42:26 EDT 2000 | James
So Darby do you use your clamshell printers in production, if so what volume? Do you use a snap off distance? With our current printers the board is held with tooling pins, when the stencil is lifted the board has a tendency to stick and lift to so
Electronics Forum | Wed May 30 15:40:14 EDT 2001 | davef
Slappy, Most of our discussions about flex came before the last great SMTnet.com server transition that destroyed the archives. Consider custom building carriers with tooling holes, vacuum line holes, alignment pins, multiple layers, etc. from uncl
