Electronics Forum | Thu Feb 25 07:37:42 EST 2010 | pcbrown
We are using Humiseal 1B31 and polyester dots for masking. We are spraying this in a Binks sprayer mixed at almost 1:1 with 521 thinner. Whe are seeing the coating creating thin halos around the poly dots as if the dots are "rejecting" the coating. T
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 | Fri Feb 02 08:36:14 EST 2007 | CK Flip
Wow, I cut first cut my teeth in the Industrial motor control industry. My 1st company made motor control products like variable speed drives, solid state overload relays, soft starts, etc. and in our shop, we used nothing BUT Dow Corning silicone p
Electronics Forum | Fri Jul 13 16:45:37 EDT 2007 | losersk8er
The Contamination has proven to be pretty random, lots of stainless steel though in fact two cases in the past two days. As far as I know all machinery is cleaned regularly as well, even the stencil washer itself. The boards we make are 90% (at l
Electronics Forum | Thu Mar 10 09:13:15 EST 2005 | davef
From http://www.IPC.org ... IPC-7351 - Generic Requirements for Surface Mount Land Pattern and Design Standard The successor to the IPC-SM-782A is here! The document covers land pattern design for all types of passive and active components, includ
Electronics Forum | Tue Aug 09 22:03:38 EDT 2005 | davef
Since these are mounting holes, they're probably all the same size. Why not try rubber plugs shaped like golf tees? Try: * Dempsey Industries; 802 N. 4th St, Miamisburg, Ohio 45342; (937)-866-2345; Gary Pascoe * Shercon somewhere in CA * Harman; 36
Electronics Forum | Thu Oct 30 15:36:18 EDT 2008 | grantp
Hi, Sounds like your engineer does not know what he's doing. We have developed and built hundreds of thousands of boards with normal square pads for 0402, and we just use a 5 thou stencil with 5% reduction and it works well. Decoupling? What is tha
Electronics Forum | Thu Oct 30 22:29:58 EDT 2008 | davef
For most applications, a nice square [or rectangle] pad works just fine. Assemblers ship boat loads of boards with these every day. It's reasonable for tight decoupling capacitor requirement applications to use round or radiused pads for components
Electronics Forum | Mon Apr 26 09:46:05 EDT 1999 | C.K.
Chrys: I have checked all the basic elements of Wave solder joint formation: fluxing, preheating, and lastly soldering. For checking the fluxer, i used a product from ECD that's very similar to what you desribed called the flux-o-meter. It did a
Electronics Forum | Mon Sep 25 08:24:25 EDT 2017 | directx995
At the moment we do it like this: We get .csv or .txt pick and place file and .csv or excel bom file. Then I verify every single placement manualy with BOM and delete placements that are not listed on BOM. (Yes, you are right, I do it for 30 placeme
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