Electronics Forum | Tue Dec 18 09:31:45 EST 2007 | rgduval
Bill, Any reflow oven sales guy would be happy to help you with a snazzy sales pitch. I also had some info from paste manufacturers when I pitched it to my boss. Essentially, I believe, it comes down to control. You may be able to get a 4-zone ho
Electronics Forum | Tue Jan 15 16:44:54 EST 2008 | gregoryyork
I found some machine manufacturers put convection nozzles in line parallel with each other instead of staggering them so you get a nice parallel line up the board where there is no flux be it no residue alcohol or VOC Free. The best I could find was
Electronics Forum | Mon Jan 21 19:10:29 EST 2008 | hegemon
The APE machines are still OK in their place. We still have two APE machines that are over 8 years old and still are good for some processes, but have been consigned to the leaded solder rework area. We have upgraded to AirVac since the advent of le
Electronics Forum | Sun Jan 20 16:42:10 EST 2008 | bentigano
I have developed an application to help the ease of image set backups for YesTech AOI systems. I'm sure many CM's like to keep their scanned image sets for future reference, and manually moving those files over and over wastes time, and increases th
Electronics Forum | Wed Mar 12 11:28:06 EDT 2008 | gregoryyork
Lead Free is probably worse as it contains something like 25% more flux by volume than Leaded. But is unusual as No Clean organics usually volatise off and rosins are non volatile so should not accumulate readily unless mixing with other gases in the
Electronics Forum | Thu Mar 13 16:32:25 EDT 2008 | dyoungquist
MyData PNP machines are good for high mix/low volume because change over time between jobs is lower than with many other PNP machines. They also handle parts on cut tape strips easily and you will have these with low volume runs. As for lead free o
Electronics Forum | Tue Apr 22 03:46:19 EDT 2008 | fowlerchang
It is CSP reliability issue, which is the mobile CPU from Spreadtrum. All the tests passed and shipped to customer. They assembly them and tested but failed. After they reflow this CSP with hot air gun, some of the boards passed. We got some board
Electronics Forum | Thu May 01 10:51:09 EDT 2008 | realchunks
You need a paste designed specifically for this. They are available. Most have 2% silver in them and higher temp flux so you can reflow at "no-lead" temps. The silver aids in the intermaetalic bond and the high temp flux allows you to reflow the n
Electronics Forum | Fri May 02 16:20:35 EDT 2008 | rwyman
We've never, to my knowledge, sent out Pb-free BGAs to be reballed for use on an SnPb assembly. In fact, we developed an in-house reballing process and we haven't felt the need to do that either (for salvaging an occasional reworked part, maybe).
Electronics Forum | Thu May 01 18:26:50 EDT 2008 | jmelson
I am partial to Weller for the small rework irons. I use both the WSL with WMP (current model) and some older EC1302 irons with their power supply (I forget the model, but the one with analog setting knob and digital temp readout). I actually prefe
