Electronics Forum | Mon May 20 13:14:05 EDT 2024 | dontfeedphils
I almost always go with an overprint as long as it's feasible. I haven't had much problem with solder-balling when overprinting. I'd give it a try and see how it works for you.
Electronics Forum | Fri May 17 17:57:10 EDT 2024 | yannick_herzog
Hello, We have problems with insufficient solder volume on a component. To solve this problem, we want to add more paste to the component. We have two options for this: 1. run a stencil with a step to achieve the required volume. 2. overprinting
Electronics Forum | Fri Jun 07 11:08:34 EDT 2019 | gregoryyork
OK good if you get really close to the two small solder balls trapped in that greasy waxy residue and carefully turn the balls over you should see that they are flat on the side stuck to the solder resist.
Electronics Forum | Fri Jun 07 10:46:16 EDT 2019 | gregoryyork
The Single Solder ball stuck to the mask may indicate undercured as well. The issue is not so much the mild No Clean flux but the potentially major active HASL flux or Silver Process chemistries causing issues. This has been through flow solder hasnt
Electronics Forum | Tue May 19 12:54:55 EDT 1998 | Richard Jackson
| We had a similar problem. But whenever the solder came from the screen printer the solder would wet to the gold fingers, with the help of residual flux. But the problem is balls, that I assume are not wetted to the gold fingers but instead are jus
Electronics Forum | Tue May 19 10:23:06 EDT 1998 | Mike C
| Howdy Richard, | Welcome to the club! I now dub thee a full fledged member of the "Spotty Gold Finger and Bleeding Ulcer Society"...or SGFBUS for short... (GRIN) | I know it's not funny to be in that position, but there's so many different places t
Electronics Forum | Thu Apr 16 13:40:08 EDT 1998 | Chrys
| Is there anybody to help me ? | We have small balls appearing on the boards soldered by | wave soldering machine and it looks that use of nitrogen | is linked to the problem (because without nitrogen, we have no more | problems). | That remind you
Electronics Forum | Wed Mar 11 18:28:03 EDT 2015 | gregoryyork
Hi its undercured solder resist which leaves a clear waxy/oily residue and can be seen as brown tar/oil in the molten solder wave. This also causes MicroSolder Balling and some snail trails of solder pick up and worst case bridging and peeling resist
Electronics Forum | Tue Jul 04 16:13:09 EDT 2000 | TOOLMANTIM
HELLO BILL I HAVE SOME QUESTIONS FOR YOU 1:HOW ARE YOU CLEANING YOUR STENCIL 2:ARE YOU SINGLE OR DOUBLE PRINTING. 3:ARE YOU USEING VACUUM FIXTURES OR NOT? HERE ARE SOME OTHER THINGS TO TRY. IF YOU ARE CLEANING YOUR STENCIL OFTEN BECAREFUL OF USEING
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