Electronics Forum | Wed Jun 08 13:49:48 EDT 2011 | sonofptolemy
Hello, I am having a problem with HASL PCB's after it comes back from the stuffer. To me it looks like oxidation and it causes poor wetting. This leads to a bunch of problems all of which have different symptoms but the cause is this oxidation proble
Electronics Forum | Tue Jul 05 13:11:46 EDT 2011 | markhoch
Hi Bill, I agree with not cleaning the no-clean. If you're looking for a cleaner because one of your customers is requiring no residue be left on the PCB's, I'd investigate switching to a Water Soluable Process for those specific assemblies. (You'll
Electronics Forum | Tue Oct 04 11:54:49 EDT 2011 | davef
We'd like to help you, but we don't have a clue of what you're talking about. * Which 'heatseal' machine are you using? Is that a reflow soldering machine? See, we think of a heatsealing machine as one that bond the two sides of a plastic bag togethe
Electronics Forum | Thu Oct 27 16:49:05 EDT 2011 | CPI
I’m looking for information regarding Reach and what a contract manufacture is required to supply their end customer. We are just getting our feet wet with this requirement and I want to make sure we nail this out of the gate. Is it just the MSDS tha
Electronics Forum | Fri Nov 25 14:52:50 EST 2011 | davef
Sn43/Pb43/Bi14 is a low temperature leaded alloy that has been used with very good success. The low melting point helps avoid some thermal shock issues on some assemblies. A word of caution, this alloy forms a low melting point at approximately 95*C.
Electronics Forum | Fri Jan 06 13:47:15 EST 2012 | davef
Your starting [and finishing] point should be IPC-7351B Land Pattern Calculator and Tools - http://landpatterns.ipc.org/default.asp For more, look here: * http://www.smtnet.com/bob-willis/pbdai.html * http://www.onboard-technology.com/pdf_novembre
Electronics Forum | Fri Apr 06 17:06:43 EDT 2012 | joeherz
Hello, We have been tracking our SMT quality levels using DPMO which has been a great way to monitor our process with a huge variation in products we build (we're an low vol/high mix EMS provider). We are now looking at implementing the same scheme
Electronics Forum | Fri May 04 13:42:11 EDT 2012 | spoiltforchoice
The Manncorp machines are Autotronik machines re-branded. These are Chinese built while pretending to be German, they are seemingly capable enough and do come in at very attractive price points. The FLX from Essemtec is in many ways a slicker machine
Electronics Forum | Mon Aug 05 10:06:41 EDT 2013 | stevevb
Hello Scotty, As a CM, your first process should be new. We bought a Quadra P&P centric line to build our solid state relay products and loved it so much, we (VB Controls) became a TWS Automation distributor. Recommendation: 2700 semi-automatic s
Electronics Forum | Mon May 07 16:07:05 EDT 2012 | davef
Start with targets based on the stencil thickness (for height) and stencil thickness times the aperture size (for volume). * Set reasonable upper and lower control limits (+ 25% and –25 % of the targets, for example). * Next, check the printer set-u
