Electronics Forum | Wed Apr 09 03:21:36 EDT 2008 | fnorradd
Hi Steve, The adjustable workboard holders are a mixture of universal and aftermarket, they do not use the clamp down arms which were originally with the universal pbs holders, they are the type which have two grub screws holding the clamps to the h
Electronics Forum | Mon Jun 16 23:57:47 EDT 2008 | grantp
Hi, How has it worked for you with small parts such as 0402, and are you using these size parts, and getting any tomb-stoning problems? We used lead paster with our vapor phase, while lead free should have less surface tension, so I have always won
Electronics Forum | Tue Mar 31 08:11:51 EDT 2009 | davef
Solder ball formation can be a significant problem if the balls get trapped in the smaller spaces between ceramic chip carriers and substrates or possibly between the leads of small pitch leaded ICs. The solder balls also reduce the solder volume ava
Electronics Forum | Wed Nov 04 10:31:25 EST 2009 | vetteboy86
I'm not familiar with a puff off setting. I have tried some different things including release delay to shut the vacuum off before the nozzle lifts in the upward direction. I tried to minimally overstroke the part hoping the paste tension would over
Electronics Forum | Sun Jan 31 18:05:30 EST 2010 | davef
Questions are: * What kind of oil is this? Where did it come from? * In olden days, we used to pour oil on the wave solder pot to limit dross formation and loosen-up the solder. Miss that stuff, sigh. * Is there oil under the BGA? It's surface ten
Electronics Forum | Thu Feb 25 14:06:56 EST 2010 | CL
Good Afternoon Duane, Surface tension should be adequate to hold the smaller BGA's during second side reflow. You will need to ensure that nothing comes in contact with the parts during reflow. I have added a chipbonder adheasive at the edge of some
Electronics Forum | Thu Dec 09 07:21:10 EST 2010 | scottp
You won't have 2 mil height because the solder doesn't remain brick shaped. It's a dome. In the past I tried doing some calculations using the formula for the volume of a spherical section and also tried using a simulation program that accounts for
Electronics Forum | Thu Jul 21 10:48:02 EDT 2011 | emeto
We use QTS and Vectour guard. I would prefer Vectourguard - it is very siple to set it up. However, you have to check the tension of the stencil everyday. I wouldn't trust them as 29 inch hard frame. It is always a metter of quantities. If you deal w
Electronics Forum | Wed Nov 13 15:33:08 EST 2013 | mondalaci
Good question :) I'd say with a machine that is available for an average pick and place operator nowadays. Our manufacturer is not fixed yet, that's why I don't have any specific. On a related note I'm wondering whether the machine is so importan
Electronics Forum | Mon Aug 24 22:27:52 EDT 2015 | sarason
Your solder looks like it hasn't had time to reflow. Are`the pictures of an aluminium substrate ? So just positing a theory your boards need more soak time, the solder seems to have formed little hills/mountains and then cooled off before the surface
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