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 | Wed Feb 16 05:09:30 EST 2000 | Dean
You might try a no HASL spec on your fids...but shelf life may hamper copper quality. Not a pleasant situation...opertors tend to polish the fids with erasers to compensate but this leads to eraser "bits" in your equipment and your solder! Maby op
Electronics Forum | Wed Oct 25 07:54:16 EDT 2000 | CAL
We were using a Glenbrook RTX then upgraded to a jewel box. We have been extremely pleased with both Glenbrook units.Glenbrook has great analytical BGA software.Glenbrook and ERSA have also teamed up to provide total inspection solution package. 973-
Electronics Forum | Wed Oct 11 09:55:10 EDT 2000 | Ian Harrison
Some boards that are populated by one of our subcontractors are getting a white powdery residue forming on them. I think it is the non clean flux and process which they are using that is causing the problem. Their process is as follows. Flux is put i
Electronics Forum | Fri Oct 06 10:19:21 EDT 2000 | JAX
Head, There are no rules on what is placed by machine. Some things to look at: 1. vision alignment issues a. board size ( FOV ) 2. Machine pick-up a. special nozzle b. off center pick-up (depending on machine this could cause a problem) 3. Re
Electronics Forum | Wed Sep 20 22:19:06 EDT 2000 | Herman Koo
I am operating MPM AP HiE. The squeegee was just repaced with metal blade, side plastic deflectors(with spring) at both ends. The engineering dept suggested that we level the squeegee with the plastic deflector up. Afterwards, we loosen the screw and
Electronics Forum | Thu Sep 21 12:03:35 EDT 2000 | Boca
We have been using a hot air knife on Electrovert equipment for a few years. It must be set up properly for a given machine, primarily the distance from the trailing edge of the wave. Sometimes the set up must be adjusted for the assembly being sol
Electronics Forum | Thu Sep 14 10:43:20 EDT 2000 | LarryK
Have a project that use to have them. End up getting a little grayer every time they came around. Finally got the design Engineer to redesign the board with through holes. Now the part is used the way it was intended to be! Ended up costing us more m
Electronics Forum | Mon Aug 14 01:49:14 EDT 2000 | Joe
G'day, I am interested in hearing about the automatic lubrication of the chains in a reflow oven. The systems I have seem to work to a certain degree. They either lubricate too much, so we end up getting oil on the edges of the PCB, or not enough, w
Electronics Forum | Thu Jul 20 14:07:23 EDT 2000 | JohnW
Mike, we use carrier's as a matter of course on all wave products, it let's us keep the conveyor width the same all the time so speed's up change overs and eleimiates one more thing that can be set wrong. The main aim of the exercise is to be able
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