Electronics Forum | Mon May 07 12:11:33 EDT 2007 | colormaker
I have the option of increasing the wave pump but when I do the wave is very unstable. Do you have the possibility to create a backflow at the wave to drain the oxides away from the board? Not sure how to do this I wish I have the old 1962 7' holl
Electronics Forum | Thu May 10 08:09:52 EDT 2007 | davef
There is no standard for time above liquidus. It is described rather broadly by the solder paste supplier. Reflow Zone: If the temperature is too high, boards may char or burn. If the temperature is too low, cold and grainy solder joints will resul
Electronics Forum | Mon May 14 18:59:23 EDT 2007 | mazemach1
I would like to ask anyone who may have use any equipment or device to check SMT socket leads. We have co-planarity problems with these sockets on the boards. The sockets we have are packaged in tubes and mostly the bent leads appear in different loc
Electronics Forum | Tue May 22 06:28:50 EDT 2007 | aj
Hi All, I ran a prototype last week with one of the above mentioned connectors on board. During Inspection post reflow we noticed a solder ball had formed at the top of each leg. We used a 5thou stencil with 10% reduction on the width but it seems
Electronics Forum | Tue May 22 12:27:04 EDT 2007 | cyber_wolf
I would consider calling Kester and telling them they need to send their people out. I could not really see mesh size being an issue on anything 20mil and above. There are several other issues that can cause aperture clogging as well...: Incorrect
Electronics Forum | Thu May 24 14:44:42 EDT 2007 | colormaker
We use a washer soluable solder flux for our solder wave. We then wash the boards in a dishwasher. We have done it this way for years without problems. We just got a new dishwasher and now we get residue on the solder (white marks) Anyone know of wh
Electronics Forum | Thu May 24 22:33:07 EDT 2007 | slthomas
By purchasing or leasing a DI system and supplying it for your final rinse, at least. You'll avoid some troublesome ionics on your boards that way. Kind of off topic, but are you filtering or boiling off your washer's waste water or are you sending
Electronics Forum | Fri May 25 12:27:32 EDT 2007 | bschreiber
You should also check the quality of your compressed air. If the proper filters and desiccants are not in place, you could be recontaminating your washed boards with condensed water and oil residues from the compressed air used for drying. Bill Sch
Electronics Forum | Mon May 28 03:36:46 EDT 2007 | aj
Hi All, We have a QFP device that is struggling to achieve acceptable solder joints. I have noticed one or two of the components shifting during reflow. I can adjust the Blowers but I dont have any issues on other boards. This seems to be a straigh
Electronics Forum | Thu May 31 11:07:23 EDT 2007 | pjc
ICT and AXI are two different methods for MDA. ICT checks component values and polarity- component and circuit electrical testing while AXI checks solder joints- volume, voids, bridging, etc.... Typically, AXI is in the SMT process engineering and QA
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