Electronics Forum | Thu Aug 16 14:29:00 EDT 2012 | bobpan
Sounds to me like a dirty quad-align. If you have cleaned the lens and have the same results then you may have dirt on the inside of the quad-align. The only fix is to replace it or blow it out with an air gun. Unfortunately it is not easy to tell if
Electronics Forum | Fri Aug 17 17:23:21 EDT 2012 | processman
Hi, Looking for some experience from others regarding frequency of repair, maintenance etc on UIC Lightning Head spindles. We have a genesis machine for the last year and we are continually removing and repairing spindles due to the Vaccuum or b
Electronics Forum | Wed Sep 12 11:10:40 EDT 2012 | cyber_wolf
We run BTU, Vitronics and Electrovert. All of those are rock solid machines AS LONG AS YOU KEEP THEM PM'ed. For some reason companies seem to neglect their oven PM's. Make sure you are buying an air only oven if you aren’t running nitrogen. The flux
Electronics Forum | Wed Sep 26 12:16:44 EDT 2012 | bwjm
Hi Guys,recently i am facing an issue. Refer to the attached photo. This PCB is high RF speed, gold immersion single layer. After reflow, my solder seems to have black stains on it. I tried with SAC305 paste water soluble and no-clean, both results a
Electronics Forum | Sat Oct 20 14:18:49 EDT 2012 | davef
I've been in shops with a flux containment pan under the wave fluxer. While I'd rather see excess flux in a containment pan than on the floor, but I'd prefer to see flux applied precisely to eliminate the need for either using a containment pan or cl
Electronics Forum | Thu Nov 29 11:06:47 EST 2012 | davef
Approaches to getting started are: * Most batch cleaning equipment suppliers provide both open and closed loop options on their machines. Talk to them about upgrading your machine. * There are companies that specialize in supplying closed loop system
Electronics Forum | Fri Dec 07 10:34:05 EST 2012 | davef
Your machine is a quality control tool. It's good for measuring trends, like the way that you use the scale in your bathroom. It's not intended to be an absolute measure. Background on cleanliness tests * http://www.empf.org/empfasis/oct03/603clean.
Electronics Forum | Fri Jan 18 12:34:14 EST 2013 | duchoang
Yes, I have. think I have pretty good reflow profile. We use Lead-Free,No-Clean,SAC305 Solder Paste. The problem is at LGA design.The pad size is alot bigger than BGA. They are totally flat and do not have balls/spheres which melted and collapsed thr
Electronics Forum | Wed Jan 30 15:10:09 EST 2013 | hegemon
Restoration of the fluxing properties? Can't see adding a liquid flux to a solder paste (assumed expired shelf life) in order to "restore" anything. If the volatiles in the original paste are gone, then adding more carriers and volatiles will not pr
Electronics Forum | Wed Jan 30 19:59:22 EST 2013 | hegemon
To dyoungquist - I understand that situation. I can see where that is possible in the case that your paste has gone a bit dry. As you said, not neccessarily the recommended practice, and yes your print regularity can go out the door. However, I th
