Electronics Forum | Thu Jun 25 11:11:13 EDT 2009 | bruna
Hello, I want to hear some experience about selective soldering for PCB using nozzle plate and screens Do you have solder defects? bridges and insufficient soldering? How do you combat that? and about the screens you have good quality? What is the f
Electronics Forum | Thu Jan 22 13:01:14 EST 2015 | dyoungquist
We are using a nitrogen generator (with a N2 storage tank) that feeds 1 selective solder machine. I do not know which type of generator it is. The N2 generator has an oxygen analyzer on it. The selective solder manufacturer recommends a N2 purity
Electronics Forum | Thu Jan 22 10:21:46 EST 2015 | charliedci
I am curious to know how others are providing N2 for their lead free selective soldering process. If you are utilizing a nitrogen generator, is it a PSA type or Membrane type? I am trying to get a handle on nitrogen purity and what purity is necessar
Electronics Forum | Fri Jan 23 11:27:45 EST 2015 | charliedci
Per our selective solder provider, they recommend a PSA type generator to supply the needed 99.999% pure N2. The membrane type (which we have) does not provide the minimum (99.995%) purity necessary for lead free wave soldering. They happen to sell P
Electronics Forum | Fri Jan 23 10:31:01 EST 2015 | rgduval
What are the continuing costs on the N2 generator? Is there replaceable media that needs to be monitored/replaced at regular intervals to maintain N2 generation? We're currently using tank-supplied N2, but are just getting ready to fire up our sele
Electronics Forum | Sat Jan 24 02:10:42 EST 2015 | comatose
Liquid is significantly cheaper than compressed gas tanks if you are in continuous production. Of course, it will eat your lunch if you're running things for a few days, then the machine sits idle for two weeks. It boils off whether you use it or n
Electronics Forum | Fri Jan 23 12:34:28 EST 2015 | dyoungquist
Our nitrogen generator and an air drying unit came with the selective solder machine when it was purchased new in 2008 as a package deal. We originally were feeding the system with air that was not properly dried. That lead to some maintenance cost
Electronics Forum | Fri Jan 23 16:11:38 EST 2015 | rgduval
Charlie, For the 300 cylinder (the largest Airgas sells), it's going to cost about $66/cylinder for the gas (plus delivery charges). They also charge a $99/year lease for the cylinder. Based on those costs, and a low-end N2 generator system that I
Electronics Forum | Thu Nov 03 09:43:55 EST 2005 | lupo
Check flux penetration and type of flux. How much is solid contents. The solder filling is better under Nitrogen. Check the time (speed) of the nozzle whether is correct. Usually For SAC305 the temperature of bath is 320C/degrees, but only for sel
Electronics Forum | Thu Apr 21 10:25:44 EDT 2005 | Fred Saffer
A thorough analysis is in order because laser point-to-point soldering lacks the flexibility of the bottom sided miniwave systems. My experience showed that heating profiles could be grossly affected by color temperature and thermal mass. This can be
