Electronics Forum | Wed Dec 04 09:24:52 EST 2002 | jseagle
I have found that preheating the solder pallets prior to use helps cut down on the solder balling. Also, we do not cool the pallets between passes and we use a spray fluxer because a hot pallet will knock down the head on a foam fluxer. We use WS f
Electronics Forum | Fri Dec 06 18:13:15 EST 2002 | slthomas
We only have solder balling problems in the interface of the pcb with the selective soldering pallet. All other boards (single, and double sided glue and waved alike) are fine, so I'm not thinking this is going to follow the normal path for resoluti
Electronics Forum | Mon Dec 02 13:16:31 EST 2002 | kenBliss
Hi Steve The people who will have the answer is the experts at EMC Global Technologies. They know their stuff, they are the leader in the solder pallet industry. They design and build them to work right. http://www.emcgti.com for contact info. Hop
Electronics Forum | Tue Dec 03 15:26:07 EST 2002 | GSW
This might be a trival mundane suggestion but try to use non conductive plate to hold components. Probably even made of the pallet material. I am sure your pallet fabricator will have tons of scrap and he can help you find one. T
Electronics Forum | Mon Dec 16 17:35:43 EST 2002 | davef
Jim Consider issuing a purchase order to your assembler for the purchase of selective wave soldering pallets required to solder your board. That way, you: * Own the pallets. * Can take the pallets with you should you decide that another assembler
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 12:52:40 EST 2002 | slthomas
We're trying a selective soldering pallet for the first time with mixed reviews. Are solder balls a prevalent problem with this process? Most of them seem to correspond with pallet wall locations....is it too much turbulence from the rotary chip wav
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 | Wed Dec 04 14:09:52 EST 2002 | Vince Whipple
By the way, what type of preheaters do you have? IR? Convection? If you have IR, there may be a way to cheat. Vince W
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
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