Electronics Forum | Tue Jan 23 23:22:18 EST 2007 | jovial_guy23
If you are looking for an effective cleaning performance with long bath life and environmental friendly nature, then definitely VIGON SC200 is a very good choice...You would not regret it...If you want to try out, perhaps you can ask them for VIGON S
Electronics Forum | Mon Dec 29 07:23:57 EST 2008 | ghenning
Watch out for workmanship specs. I don't believe this is covered under IPC-A-610. You may have to write your own. Alignment of the fixture and coplanarity of the bar and substrate are key. Also, pay close attention to stencil aperture and thicknes
Electronics Forum | Tue Aug 17 12:27:48 EDT 2010 | namruht
That reminds me...We already have home plate apertures on our stencil. Try number 2...I tried an overall reduction based on the copper layer of 10% and used oval apertures. I hope that you guys can suggest something that I am over looking. I know tha
Electronics Forum | Thu Aug 19 16:03:04 EDT 2010 | kpm135
Are you reusing your paste or putting down new every time? I've seen solder balls before when operators try to use the paste past the recomended stencil life. I've also seen it happen with a bad batch of solder paste from a vendor.
Electronics Forum | Wed Jan 05 17:56:30 EST 2011 | ppcbs
I am looking for a No-clean or water soluble solder paste, Sn63/Pb37 alloy, 15 - 25 microns (T5). I need to print with a 4.8 mil stencil opening. Does anyone know where I can get 250 to 500 grams in one week or less?
Electronics Forum | Thu May 10 15:32:45 EDT 2012 | 14367
We are having a lot of tomb stoning with this no clean solder paste. It's limited to larger, complex boards, affecting 0603 ferrite beads, capacitors and SOT23s. It was suggested that paste removed from a stencil should not be put back in it's origin
Electronics Forum | Fri Dec 20 15:38:53 EST 2013 | island2013
Aperature layout on your stencil could be a root cause as well. Home plate design aperatures have cleared this issue up for me in the past. If it's a clean product, running through the wash may get rid of quite a few of them. Also check your IPC s
Electronics Forum | Tue Sep 22 14:23:42 EDT 2015 | travishemen
We had 4 of these machines several years ago. If I remember right the drive that aligns the board to the stencil was stepper motors with no encoder feedback. We would see the same issue if our leadscrews and linear rails were not clean and properly
Electronics Forum | Wed Jan 25 00:46:09 EST 2017 | cmarasigan
Our Stencil Mask Fiducial vanishes from black color to light where our Screenprint machine unable to detect fiducial during batch teaching (auto set-up alignment). Does anybody here encounter the same problem? I am searching for a dark marker or any
Electronics Forum | Fri Mar 29 00:18:05 EDT 2019 | SMTA-Vikram
3% NDF. We using 8oz 90 degree blade type razor probes, still same issue. Is there stencil we can use or selective pasting test via so flux will not build in testvia. any help or guidance will be appreciate.
