Electronics Forum | Fri Feb 25 11:13:32 EST 2000 | Russ
This probably won't help much but I find it at least a little interesting. During some experimentation recently I accidently loaded a board into the wave upside down and it had a PLCC 68 package along with other types of components that had only bee
Electronics Forum | Fri Feb 25 04:28:49 EST 2000 | Sze-Pei LIM
We faced terrible void issue while using Sn96.5Ag3.5 solder paste, more than 20% void. We tried adjusting the reflow oven profiles but we did not have much success in reducing the void. Generally, we find quick preheat, high peak temp. and fast cooli
Electronics Forum | Thu Feb 24 15:39:59 EST 2000 | JAX
What's happening Larry, I would help you if I could but I don't remember what the fix was. Do you have it set to reject the trays? This might be what the problem is. We had to turn the tray eject option off on multiple machines due to errors like thi
Electronics Forum | Fri Feb 25 05:12:12 EST 2000 | Dean
...problem? Are you not sure its not a "feature". LOL I have had the same problem...spent many hours tracing down the sequence of events which leeds up to this situation. No real solution...however, I use the key command zero set feature rather t
Electronics Forum | Thu Feb 24 11:05:53 EST 2000 | Russ
I usuallly like to have the pad size the same size as the ball up to +2mil, the pcb solder mask opening to be +4 mil from the pad size (I have found this to aid in Xray inspection for opens since you can see the little tail of the solder wicking up t
Electronics Forum | Thu Feb 24 00:06:00 EST 2000 | Ver Viray
Hi, Can anyone help me on how to choose profile points in wave soldering...e.g. smallest like R, C, to biggest like transformer heatsink etc.... Are the thermo-couples supposed to be on top of the pcb or at the bottom touching the solder bath when fl
Electronics Forum | Wed Feb 23 21:23:56 EST 2000 | Larry Johnson
Does anyone know where I can find something in writting on the proper ways to clean a mis-printed board using no-clean solder paste? If not, can any of you tell me what the best way is? Currently, we are running mis-printed boards though the Aqueou
Electronics Forum | Wed Feb 23 21:35:01 EST 2000 | Dave F
Larry: You're correct to question this: * We don't like to run raw paste through our aqueous cleaner. It makes a blinking mess. Your entire machine is probably now coated with hazardous material ... well at least the first tank and the out-bound
Electronics Forum | Fri Feb 25 14:00:57 EST 2000 | Bill Schreiber
Dave is correct, a stencil cleaner is a good way to go. There is an article on our web site, by Dick Clouthier, that covers cleaning misprints with various types of stencil cleaners. Go to www.smartsonic.com and click on "Recommended Reading" to fi
Electronics Forum | Wed Feb 23 19:04:19 EST 2000 | Jason Nipper
Hi Mike, I have had problems in the past that were very difficult to determine the source of. Our tombstoning issues were caused by the plating on the part itself. If your smd placement, x-y positioning and placement pressure is not an issue, and
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