Electronics Forum | Fri Sep 17 15:20:52 EDT 1999 | Earl Moon
| HI everyone, | | We are using a Siemens ap-25 screen printer, in the past we have not had any problems with adhesive placement until a couple of weeks ago. It seems the x axis has decided that it should be set somewhere between .00085 and .001
Electronics Forum | Mon Jul 12 13:06:32 EDT 1999 | Earl Moon
| I had parts replaced on SMT PWBs and the repair created measling defects. | Reliability Question: | Q1. Can measling be aggrevated or grow over time due to | temperature cycling and moisture. Customer environment is | -62C to +85C. | | Thank
Electronics Forum | Fri Feb 26 04:02:16 EST 1999 | Terry Keen
| Has anyone used the mechanical stencil foil tensioning system from certain company that eliminates using stencil frames and epoxy & mesh? Any comments on whether it's worth looking into? We go through product revisions like we go through clean so
Electronics Forum | Wed Jun 24 17:52:20 EDT 1998 | Wayne
| A wishful thinking of the component mfgs! | The machine suppliers prepared themself with | different designed bulk feeders ( I like the | Sanyo design best ) and expecting the customers | of testing their products. | With some of the bulk feeders I
Electronics Forum | Sat Feb 14 13:28:47 EST 1998 | ASHOK DHAWAN
I am beginer in BGA assembly and am confused in selection of pick and place option. As per book on 'implementation of BGA Technology-by 1995 aeic inc. states that BGAs reflow is quite forgiving and you need only Mechanical centering of PBGAs. The IPC
Electronics Forum | Thu Dec 19 12:08:01 EST 2002 | davef
Facts!!! I got facts. Mechanical strength experiments of Sn43/Pb43/Bi14: �Microstructural And Mechanical Characterization Of 43/43/14 Tin/Lead/Bismuth�; J. Marshall, J. Calderon, J. Sees; Soldering And Surface Mount Technology; 10/91, p25-27 Look
Electronics Forum | Thu Sep 04 21:50:47 EDT 2003 | davef
We like to use "enameled wire" that can be stripped by hot solder. Formvar [105�C] will not do that. Formvar was designed to with stand the hot oil seen in transformers. So, it requires either chemical or mechanical stripping. Most polyurethanes
Electronics Forum | Fri Aug 06 11:07:49 EDT 2004 | JB
"I thought it was purely a mechanical up-down movement with the cam and hence the thickness hardly has any effect!" It is purely mechanical.On our high speed turret the machine knows the distance between the tip of the nozzle and the top surface of
Electronics Forum | Fri Aug 27 13:07:44 EDT 2004 | C Lampron
Hello, I believe that the area's of concern are primarily component related. Some component are rated for a temp (usually 260 degrees max) for some length of time. Tant Caps come to mind as being heat sensitive. The other concern would be the inerme
Electronics Forum | Mon Oct 31 20:16:29 EST 2005 | erokc
Ok, it looks like the direction I should take is NO mechanical chucking. I can identify with that! Using my existing feeders would make sense as that was my biggest cost of what I have now. Are the machines you mentioned non-mechanical chucking?
