Electronics Forum | Wed Feb 01 22:27:16 EST 2006 | KEN
Many relays use soldered post coil terminatins inside the relay. In one case many years ago I found the SMT relay manufacturer used eutectic solder inside their hermetic relay. The SMT relay would fail because the solder balled up on the post, woul
Electronics Forum | Thu Feb 07 14:58:08 EST 2008 | operator
We don't have one of those cool air compressed syringes to dispense adhesive. We have to do it by hand. My question is does anyone have any suggestions on syringe size, needle size etc... for successful deposition of SMT adhesive? I know you can go s
Electronics Forum | Tue Aug 22 16:02:07 EDT 2000 | Dr. Ning-Cheng Lee
If the thermal mass of the products is small, a tent-shaped profile is recommended, with peak temperature around 240C. The hottest spot on board should be less than 250C. However, if the thermal mass of the product is large, such as a large server PC
Electronics Forum | Mon Jul 12 11:35:27 EDT 2004 | Pierre RICHARD
Here are some answers to my questions after a good research. I also added more definitions that could help understand this esoteric language used in assembly, specially surrounding fluxes and their use. In blue italics are comments and extracts from
Electronics Forum | Mon Dec 22 20:16:17 EST 2008 | davef
The first question in solving the "ol' SMT component loss after second-side wave operation" problem is: So, what makes you think the components actually came-off in the wave and not during some previous 'handling'? Putting that aside, we'll play thi
Electronics Forum | Mon Apr 16 18:49:40 EDT 2012 | tris101
Hi guys, I'm looking for some tooling parts and I hope you can point me in the right direction. We design basic in house reflow Carriers to surport boards during reflow. I would like to add clamps to our designs but I can not locate any off the she
Electronics Forum | Mon Jun 27 10:45:31 EDT 2005 | franciscoioc
Thank's for the information Bob. I have another question, at the moment my peak reflow is at 218c, this means I am above the 210c a lot of companies run off. If I am building boards using SN63/37 solder paste with lead on my process, and using lead f
Electronics Forum | Thu Sep 19 11:14:45 EDT 2002 | Jim M.
We had lots of problems with bridging on 15.8mm pitch, QFP17-160 at the start.The board was .032 thick, double sided-six boards to a panel. Here is the problems (not neccessarily in the biggest to little but as i remember them) and solutions that he
Electronics Forum | Mon Nov 09 09:44:22 EST 2015 | davef
Purpose. This describes setting-up a wave soldering system set-up for a new assembly design or checking a wave solder machine operation with a test board. Applicability. To be used for new design printed circuit assembles and during machine accept
Electronics Forum | Fri Apr 30 10:42:40 EDT 2021 | oxygensmd
I have a customer who ask close to prototyping jobs with low volume and high-mix components. A regular job have around 5-30 pieces board but have high quantity and many type of components. All the time over 1000 pieces of parts on board from 250-350
