Electronics Forum | Tue Feb 05 22:19:52 EST 2002 | davef
Residual stress is not limited to BGA balls. I have residual stress. It does not leave until I start singing Led Zepplin songs at the top of my lungs. And for that to start, I need a good hour of staring at the bottom of a frosty mug at Jimbo's Lo
Electronics Forum | Wed Oct 10 12:01:22 EDT 2007 | russ
you could call DIMA and have them give you a starting recommendation OR get a fab and run it through with a thermocouple and adjust from there. as a start try these. 220 180 180 300 top and bottom belt speed @.4 I do have one of these ovens and t
Electronics Forum | Fri Oct 12 11:07:03 EDT 2007 | stepheniii
To get you started you might want to look at http://en.wikipedia.org/wiki/RoHS I think it's as good a place as any to get started. It has the basics explained in a straightforward manner. At the bottom of the page are external links they probably
Electronics Forum | Fri Apr 08 09:33:32 EDT 2005 | Dave G
We put the following on our travelers: Finished Assembly Part # Date Started (@ Bottom SMT) Date Finished (@ Top SMT) SMT Inspection -- Just a checkbox Postwave Inspection -- Just a Checkbox Board Wash -- Just a Checkbox Solderpaste Date Code & Type
Electronics Forum | Wed Jan 11 14:38:37 EST 2006 | cg
We have recently started using lead free solder on our wave. The dross accumulates rather quickly. The dross flakes (tin oxide?) are light enough to sometimes fall or float into the main wave. What kind of quality concerns are there if the dross is m
Electronics Forum | Sat Mar 04 12:01:28 EST 2006 | slthomas
Slightly related story....my dad (vision not so good) put a gallon of WATER in with 4 gallons of cooking oil to deep fry a turkey. Of course the water was on the bottom and when it started boiling, whoooheeee!
Electronics Forum | Fri Jun 15 08:53:02 EDT 2007 | ed_faranda
I remember seeing that formula, but looking through my notes, I can't find it. My R&D group is starting to bigger and bigger parts on the bottom side. Could you please email or post that formula?
Electronics Forum | Sat Sep 26 21:45:37 EDT 2009 | casmt
It didn't see the ref points on the bottom of the hydra head. start by checking the camera for dirt or dropped parts. Is it a hydra camera or Linescan?
Electronics Forum | Wed Nov 10 16:33:09 EST 2010 | esoderberg
I don't. However we perform inline ICT and functional testing on both sides and the first side has never had issues. It is only when we flip the board and start reflowing on the bottom side.
Electronics Forum | Fri Apr 29 11:54:05 EDT 2011 | marcpeo
Jeff or Bilal at Heller can help out on this. Give a call to Heller at 800-394-OVEN and press 5 when the recording starts and one of the team will get to the bottom of it with you. Best, Marc
