Electronics Forum: used (Page 1771 of 2487)

Farewell to All!

Electronics Forum | Sat May 20 09:38:55 EDT 2006 | slthomas

"witty and provocative" And that is pretty much the perspective I see all of this guy's posts from. I don't take it seriously for a second. How can you take that author name seriously? And quoting himself is perfect if he's using new usernames for t

Business question for you CMers

Electronics Forum | Thu May 18 14:14:57 EDT 2006 | samir

Sounds like your company will need to make a "sound business decision." Is this a contract that you guys really want to win? If yes, then Chunks is correct. Jump through hoops for this customer and "eat the cost" of rebuilding or repairing their b

Laser Depaneling / Routing

Electronics Forum | Wed May 24 16:29:34 EDT 2006 | smt_guru

Yet another example of narrow focus. "What's the best and latest machine out there, and should I use a technology that's been around for decades." Wrong approach there, Chunks! Think outside the box. My firm, Worldtronics Consultancy Services, In

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 16:19:58 EDT 2006 | inds

John, there have been quite a few discussion on Mixed Assemblies in this forum.. do a search.. you will get whole lot of information.. in addition - IF you are using Lead-free reflow profile...make sure the rated temp for Sn-Pb components is not vi

Mix Pb and Pb free alloy

Electronics Forum | Wed May 24 16:40:40 EDT 2006 | samir

Yikes! Sounds like a hairy situation there. I've successfully collapsed a Pb-Free BGA (using a Sn/Pb solder paste), with a peak temperature of 220 Deg. C and Time Above SAC's Eutetic point (217) of 17 seconds. Beware of overcooking your smaller ma

Tin Whisker Formation?

Electronics Forum | Fri May 26 14:15:16 EDT 2006 | patrickbruneel

Its it possible to post a picture from right after reflow? To see what we start with and compare the difference after 5 years. The grainy structure is not as much a concern as the growth-like appearance on the boundary of the solder. What paste al

SMT optimization and improvement

Electronics Forum | Thu Jun 01 04:51:21 EDT 2006 | EC

Hi TS, Most of the machines will face this problem after been using few years.....I handling SMT equipments ( Fuji machine ) and process.....sorry if I have offened you...... Hi Jack, Firstly, you must able to tell which component having a high thr

SUZUKI Pick and Place Machine

Electronics Forum | Thu Jun 01 07:40:23 EDT 2006 | netellink

I have a Suzuki vision machine with 4 heads (SMT-1000VL). This machine is using the camera to inspect the nozzels (4 sets) in the nozzel tray changer every time it is going to change the nozzel(s) in the 4 heads. The problem I have is now the machine

Flux Compatibility Issues....

Electronics Forum | Mon Jun 05 14:35:17 EDT 2006 | marc

Yes.... stop checking on your process.... :) Seriously...if you cleaning the boards after I would suspect no issues. If your leaving the flux on the board (I suspect they are using quite a bit) then I would be concerned. Since the boards have al

Flux Compatibility Issues....

Electronics Forum | Thu Jun 08 17:13:41 EDT 2006 | davef

We don't agree that "a little to the top would just even things out". The raw flux on the top of the board never touches the wave and so, does not receive the proper amount of heat for activation, except at the through hole barrels. * We assume WML


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