Electronics Forum | Wed Mar 02 08:53:58 EST 2005 | jdengler
I like Alpha Metals OM-5100. Very long stencil life with good results. Jerry
Electronics Forum | Wed Mar 02 09:28:02 EST 2005 | bobsavenger
I am looking for images of solder paste defects like Past stringing, paste gorging and dog ears. I would also like to have the avi file to show how tombstoning happens in the reflow oven. Thanks Bob
Electronics Forum | Thu Mar 03 09:29:12 EST 2005 | jdengler
This sounds like you are using a straight ramp profile. For this type of an assembly you may need to use a soak type profile. Most solder paste providers show you both types of profiles that work best with that paste. I would try using that profil
Electronics Forum | Fri Mar 04 13:22:39 EST 2005 | pr
I believe DEK manufactures stencils that will do this. I'm sure their Apps. engineers could help you with squeegee material etc. good luck, pr
Electronics Forum | Mon Mar 07 20:33:35 EST 2005 | KEN
Rule 1: Clean it as soon as you see it! Don't let it dry. It's harder to clean up and can be easily injested when in a dry powder form. Rule 2: See rule 1
Electronics Forum | Tue Mar 08 15:18:15 EST 2005 | Tim
Thanks for the response. What I am looking for is what personal protection or other safety precautions should be used when cleaning the machine of paste/dross/dust. Any experience with this?
Electronics Forum | Fri Mar 11 12:19:50 EST 2005 | Carmine Garboza
I'd like to see the rotary vane vacuum which could suck up a column of molten tin/lead 2 inches in diameter...
Electronics Forum | Thu Mar 10 13:05:41 EST 2005 | patrickbruneel
This phenomenon is caused by a high amount of halogens (Cl, Br etc.) used in the flux activators or in the flux surfactants. We've seen effects creating all colors of the rainbow. Changing to No-Clean (halide-free) will eliminate this color effect.
Electronics Forum | Thu Mar 10 14:31:57 EST 2005 | russ
Patrick told you why, But here is some more info for ya, I would absolutely not recommend that wires be tinned with OA. The residue will never get cleaned underneath the insulation and all of your strands will strt to break in the near/far future.
Electronics Forum | Wed Mar 16 18:39:55 EST 2005 | KT
I am looking for the same. IPC 610D does mention about the solder fill based on the class (A,B,C). But, there is no exhaustive study that I have come across. Please let me know if you find any. KT
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