Electronics Forum | Wed Apr 10 22:46:04 EDT 2002 | davef
On SMTnet, we've discussed the the frailties of controlling paste height, when volume is a more telling measure. Sometimes if you seperate too quickly, the paste tries to stay attached to the aperture walls. This creates a 'U' shaped deposit with r
Electronics Forum | Thu Apr 11 07:13:09 EDT 2002 | Johan Bergstrom
Don't throw away the tapes ! We use vast quantities of component tape while testing our P&Pmachines. And mind you, we are normally not particular on what values the components have. ( For some tests we don't even need components in the tape. Its just
Electronics Forum | Tue May 07 07:55:33 EDT 2002 | Sir Alexandr
Our SMTproduction has next troubles : 1. irregular 0603-components in tapes (different solder shapes) makes vision errors on placement devices 2. big solder amounts makes pickup and placing errors 3. some tapes delivery delays , so production halts f
Electronics Forum | Tue May 28 17:33:31 EDT 2002 | wilcoxito
We are just getting started doing BGA assembly at our plant. Any helpful hints would be greatly appreciated. My first main question is about stencils. We are considering using diamond shaped holes for the BGA pads. Does anyone have any experience
Electronics Forum | Tue Jun 04 17:21:22 EDT 2002 | jasonfang
I found solderballs are around chip components (on one side of middle area), I checked gerber data, solder paste of aperture on the stencil for these chip components have 5% reduction to solder land on PCB, shape of solder land are square, not home p
Electronics Forum | Thu Jun 13 11:25:40 EDT 2002 | davef
Help us understand your situation by telling us about: * Is this a terminal-to-terminal short on a single MELF? Or is this a terminal-to-terminal short between or than one MELF? * Clearance of 0.8mm is the distance between what features? * Size ME
Electronics Forum | Wed Jul 03 20:21:26 EDT 2002 | alex_kirichenko
Thanks for responding..... The question I was trying to ask is if U appetures are mechanicaly strong, if the tab in the middle won't stik up and damage squeegee blades? I never had stencil with such appeturs. We are just about to start some trials
Electronics Forum | Tue Aug 13 01:53:19 EDT 2002 | kenbliss
Hey Tony Although clearly everyone so far on this forum agrees that there is no real number in real life and virtual life is well....useless. The reality is that what you are really after is maximizing uptime, meaning, look closely at every event t
Electronics Forum | Mon Oct 14 18:30:49 EDT 2002 | seand
Hello all, My tankard is hoisted on high. I always feel that it's good to get a good discussion going with alot of input. My thanks go out to all who have and continue to respond. Sometimes the best outcomes come from the most hotly debated topi
Electronics Forum | Tue Nov 19 10:25:45 EST 2002 | mcmilse
I have a question abut flux and solder preforms. We build some assemblies that have deep pockets in which we use solder preforms and add flux before placing parts and then onto reflow. I was wondering if anyone knows anything about how much flux sh
