Electronics Forum | Wed Dec 06 14:42:28 EST 2006 | wrong way
Im using kester easy profile 256 and just this week started seeing problems with the paste being to thick sticking to the sqeeges and not going thur the screen this is not a lead free paste but it is a keester product
Electronics Forum | Thu Nov 09 12:23:10 EST 2006 | russ
Good luck frazzled! sure would like to see what you got going on though. Russ
Electronics Forum | Thu Nov 23 09:41:36 EST 2006 | Jon
The DPMO is a far better measure - first pass yield doesn't give you any indication on quality or effectiveness of test step. If you want 100% first pass yield, test nothing - works every time - you see where I am coming from..........
Electronics Forum | Sat Nov 18 08:56:47 EST 2006 | jdumont
Nothing is missing I suppose. I was looking to see if there was another standard more appropriate to add to our POs. Something like, "all incoming material must be packaged according to J-Std-033B under penalty of death...or returned material."
Electronics Forum | Tue Nov 21 12:36:52 EST 2006 | kmeline
Hi Bill, I have profiled the boards using a KIC. The temperature the board sees is close as I can get it. This is not the only difference I have seen between the two oven but it is the one I haven't been able to workout.
Electronics Forum | Tue Nov 28 17:43:03 EST 2006 | IRAS
I'm looking to gain some knowledge on potential causes of solderballs on LGA's and advice on how to eliminate them. we all seeing some solderballs on only the edges of the LGA. Any inputs will be greatful.
Electronics Forum | Wed Nov 29 17:00:40 EST 2006 | John S.
We've used both effectively to resolve this issue. Check with your stencil manufacturer. Often, they can give you a very good starting place on issues like this since they see everyone's designs. John S.
Electronics Forum | Fri Dec 01 11:36:53 EST 2006 | Rob
These are usually 260C for 5 seconds, however, this is only the top end of the graph. Ask your supplier for the recommended profile for this part and check that you are inside the curve for the whole process. We are going through around 250K of the
Electronics Forum | Tue Dec 05 21:19:14 EST 2006 | Jack
Hi Doug, I think you are right..Let me do some EDX on other location to see any nickel oxide...BTW, is this black pad reworkable?? If yes, how? Thanks in advance,..
Electronics Forum | Wed Dec 20 17:03:50 EST 2006 | aj
By the way , changing the ball screw will also sort your problem out because you will have to carry out the Z-axis setup ( belt tension etc ) as part of the change. so it is worth a shot to carry out the setup and see how it goes! you will have nothi
