Electronics Forum | Tue Nov 09 14:21:00 EST 2004 | Dreamsniper
Thanks Russ. When solder paste is applied, you can't see the pads. Because my aperture reduction is 5% - 10% of the pads. Pads are reduced by almost and up to 20% by the PWB Fab and the paste covers the pad. We cal align and inspect but very hard as
Electronics Forum | Wed Nov 24 05:57:31 EST 2004 | chad
If you're using tooling pins, you may check to see that they do not have wear on the sides from boards repeatedly rubbing against them. I have seen this problem several times, you may give it a look. If you're not using them, I'd suggest that you gi
Electronics Forum | Tue Nov 30 17:26:41 EST 2004 | donb
Thanks for the advice folks, but we only have one Fuji Engineer in Australia, and he is in Asia for training. I haven't looked at the machine yet, but am told it is misplacing small parts. It may only be the camera that needs calibrating, but I won't
Electronics Forum | Tue Mar 15 13:24:44 EST 2005 | pjc
There is equipment available to clean NC residues off low standoff devices, well below 0.8mm (0.031"), from Speedline Technologies- Electrovert and Accel. See this paper under Accel: "High Reliability Underfill Performance through Proper Flip-Chip D
Electronics Forum | Thu Dec 09 16:15:32 EST 2004 | Kevin
You should try looking into the Technical Devices Nu/Era. They offer the best warranty on their lead free solder pots. They use something called Titanium Nitride which has been tested to outlast Melanite. The dross produced on the TDC machines i
Electronics Forum | Wed Dec 15 07:54:46 EST 2004 | rlackey
Hi Vinit, Glad to see that you are so passionate and knowledgeble about your machines, and I'm sure Assembleon has come on a long way since I last used their machines. You'll have to forgive me as I'm just an engineer whose only concerns are accur
Electronics Forum | Thu Dec 16 10:08:20 EST 2004 | jdengler
Hi Clayton, If your in the USA you should contact Fuji America for new manuals. I bought some a couple of years ago for $35.00 ea. That's a bargain in this industry! Used manuals often have missing or damaged pages. These always seem to be the o
Electronics Forum | Sat Jan 08 08:50:35 EST 2005 | davef
Normally, you should not have to bake boards that are properly packaged and stored. Since you are seeing problems, baking makes sense. Consider 125C for 4 to 6 hours. Additionally, look here for more, while waiting for others: http://www.smtnet.
Electronics Forum | Mon Jan 17 11:23:49 EST 2005 | Brad
Ya Russ is right for Ti Parts they tend to use more pelladium, which requires a bit more heat average temp increase is about 10 degrees C. from 225-235. As far as optimum solder joint I look for fillets on all sides of leads. The back of the lead is
Electronics Forum | Tue Feb 01 10:25:24 EST 2005 | Scott Baker
Jay - I read your report and was interested to see that you ran your evaluation on a Heller 1500 5 zone. We have been hearing for some time that a larger machine (7 zone min)with higher temp heaters and fan motors would be required. Is yours a "hi t
