Electronics Forum | Thu Feb 27 08:59:15 EST 2020 | spoiltforchoice
In both cases, it will depend on storage conditions, unless you do something horrible to them (or as previously mentioned, wash them) months & months. For boards we put through SMT and then stash for THT loading in smaller qty's I don't think we've e
Electronics Forum | Tue Feb 25 10:30:02 EST 2020 | richardcargill
If you get the stencil made with all apertures included then you can blank some off with sellotape. Saves you buying 2 stencils should you require them machine fitted in the future
Electronics Forum | Tue Feb 25 11:56:33 EST 2020 | slthomas
I think I'd opt for a stencil with everything already cut and then tape it if that didn't screw up your stencil gasketing. Then you just have to define the process for adding the optional parts and you can decide to use those apertures or not.
Electronics Forum | Tue Mar 03 07:47:48 EST 2020 | dontfeedphils
Thanks for the info. In a past life I ran everything WS and washed in a batch wash using saponifier. I'm surprised I never saw anything then as we would regularly wash boards assembled on only one side. Unless it's specifically washing in DI only.
Electronics Forum | Thu Feb 27 16:23:37 EST 2020 | dwl
http://www.circuitnet.com/news/uploads/3/Comparing-Soldering-Results-of-ENIG-and-EPIG-Post-Steam-Exposure.pdf Years ago, I battled this problem. ENIG PCBs reflowed with active WS flux. We built one side, and then washed them because they were going
Electronics Forum | Wed Jul 07 13:37:56 EDT 2004 | mark
Not sure if this helps but found this site that outlines % of N2 against O2 ppm levels. You need 99.99% N2 purity for http://www.tkb-4u.com/articles/consumables/whatisnitrogen/whatisnitrogen.php Most customers we have worked with in the past run an
Electronics Forum | Sat Feb 15 15:39:53 EST 2003 | Joe
I have the identical machine and setup as you with the same issue(s). I looked at setting up for N2 but am choosing to retrofit to a standard lambda nozzle setup. If you are soldering bottom side SMT parts or other challenging assemblies, N2 may ma
Electronics Forum | Thu Feb 13 08:28:47 EST 2003 | pjc
Call 1-800-737-8110 for tech support. They can give you the N2 supply specs for the 650C. You should consider the cost to convert the Contour to a standard Lambda vs. the cost to bring in N2 and the consumable costs. Tech Support can give you the ret
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 | Tue Jun 20 07:51:21 EDT 2006 | Chunks
What is your process? Wave solder, hand solder, pin in paste?
