Electronics Forum | Mon Dec 02 16:01:15 EST 2002 | russ
If you can, attach athermocouple to the locations where you are getting solder balls. A previous product I had showed the same thing and we found that we had inadequate preheat leaving the liquid flux to splatter when it hit the wave. It could aslo
Electronics Forum | Mon Dec 02 18:01:12 EST 2002 | GSW
Hi, Try to check if there is water absorbed in the flux or the humidity around the wave area. possibly plating on barrels that might be damaged?
Electronics Forum | Thu Dec 05 11:36:30 EST 2002 | William Guatemala
Have you check the flux gravity lately? If not, Check the flux gravity every 6 hours to make sure proper parameters are meet. Here is a list of things that may cause your solder ball problems; Excecive heat, defective fixtures, preheating temperature
Electronics Forum | Mon Dec 02 17:02:28 EST 2002 | Vince Whipple
Steve, I agree with the recommendation to check the temperature. This is the first place to go. Is this an IPA or water based Noclean? What is the topside temp of the assembly at the effected areas? If you are too cold you will have a tendency to hav
Electronics Forum | Mon Dec 02 16:19:11 EST 2002 | slthomas
Unfortunately it's nc or we'd be worrying about this on the fly. Non-contact is defintely and issue....this is an 18"x9" board with 1500 bottom side SMT parts that are scattered among the through-hole and vice-versa. We're currently using 7 hold-
Electronics Forum | Tue Dec 10 14:10:38 EST 2002 | Randy Villeneuve
Steve, I wave solder most if not all our boards with selective wave pallets. I did not catch if the solder balls were on top of the board or on the bottom but that will make a difference on what to do to get rid of them. Pallets are good and bad. On
Electronics Forum | Tue Dec 03 18:31:45 EST 2002 | slthomas
At the price of Durapol we'd never get the OK to have them made. The Al fixtures are cheap and a quick turn local item. As dense as the pth parts are I also don't think there'd be any room for any holes which I really think is the answer as far a
Electronics Forum | Tue Nov 14 22:01:07 EST 2000 | Dave F
I'd love to get to the point that I could discuss the impact of flux on dross formation. Until then, I fight with proper solder pot temperature, maintaining enough pump speed, and solder contaminants.
Electronics Forum | Tue Nov 21 22:15:59 EST 2000 | Vince Whipple
Mohammed, The first suggested place to start with your question would probably be with your flux Mfr. Push them! The quantity of dross is effected by several factors: The higher your solder pot temp., the higher your dross level... but don't go too
Electronics Forum | Wed Jun 21 11:30:27 EDT 2017 | ranap121212
but we do not have laminate preheating on robots. There is no flux separate application, the flux is in the soldering wire
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