147 import and my12 results

Electronics Forum: import and my12 (Page 3 of 15)

Pre- and post-reflow rework

Electronics Forum | Sat Feb 05 14:51:49 EST 2005 | etienne

One important thing to look at, when buying an AOI is the False Calls Rate, along with tact time of machine to inspect the PCB. Obviously, many machines can do the the work....but it's also true that each machine differ from the way it do the work. S

N2 and Voiding??

Electronics Forum | Thu Oct 18 11:08:22 EDT 2012 | scottp

Since we follow IPC Class III, I've done experiments turning N2 on and off and measuring void level with both SnPb and SAC305 solder. In both cases there was a statistically significant, measurable increase in voids with N2, but it wasn't significan

SMT optimization and improvement

Electronics Forum | Fri Feb 16 11:07:25 EST 2007 | stepheniii

I'm not sure if anyone mentioned the single most important factor. p.m.'s. If the nozzles are getting dirty and clogged it's not going to do a great job of picking parts up. Don't think in terms of variation. It's there it's unavoidable and undet

SAC305 and Selective Soldering

Electronics Forum | Wed Sep 18 14:12:40 EDT 2013 | pjchonis

Hello Bachman. SAC305 is the most common lead-free solder alloy, not only for wave soldering but also selective. Most of our selective customers (especially automotive) are using SAC305. What is more important than the alloy to consider is the flux

Board Stacking and Conveying

Electronics Forum | Mon Mar 26 16:58:53 EDT 2018 | solderingpro

Is there anything stopping you from replacing the flat belt solution to a continuous running steel roller chain conveyor? - From there (depending upon board temperature) you should be able to buffer your boards in a vertical buffer station if neede

SMTECH pro's and con's

Electronics Forum | Mon Apr 30 18:17:16 EDT 2001 | ianlg

Hi Barry Unable to assist on specifics but I can tell you that some 74 100is machines were built. The majority residing in China Imported in by Wong King Kong Ltd ( Johnson lee Tel 00852 2357 8888 ) Most are at either Flextronics or Roslare. You mi

Mydata Pick and place

Electronics Forum | Thu May 24 09:11:12 EDT 2001 | Grant Petty

Hi, I would agree. We purchased a TP9 just the slow machine, but we were a small company at the time, and it worked fantastic. Almost no maintenance, and it's a dream to changeover. The serivce in Australia is also very good, but that does not appl

SMTnet Cookies and You

Electronics Forum | Wed Oct 07 11:51:51 EDT 1998 | Clifford Peaslee

You may have noticed that we have started using cookies on the site, and I wanted to explain the importance of cookies. Cookies are used at SMTnet to facilitate future enhancements of the site like personalizing your experience while browsing our si

Cp and Cpk values

Electronics Forum | Mon Mar 03 11:06:13 EST 2003 | msivigny

Hi floydl, I completely understand when it comes to data crunching after long hours of performing measurements, it's the last and most important arduous task in obtaining performance data. If a measurement and evaluation process that traditionally to

PDBE and PBB replacements???

Electronics Forum | Fri Mar 11 18:47:54 EST 2005 | davef

JD: It's important to note that FR-4 does not contain PBB or PBDE. The bromine in FR-4 epoxy comes in the form of tetra-bromo-bisphenol A [TBBA], which polymerizes and become part of the cross-linked epoxy. Bromine, in the form of hydrogen bromide, i