Electronics Forum | Mon Apr 07 11:39:55 EDT 2003 | russ
How thick is your stencil? We print 16mil every day with type 3 paste 2 of which you have tried (Alpha and Kester) Stencil should be 5 mil. Russ
Electronics Forum | Wed Jul 30 23:16:01 EDT 2003 | praveen
The profile is enclosed.The PBGA is 37x37 mm.I am keeping the gap about 4-5 mm.The profile meets the solder paste spec.Peak temp is 211 deg C,Above melting point 77 sec. rate of heating
Electronics Forum | Wed Sep 15 22:43:24 EDT 2004 | davef
Just to help convince those on the fence that we don't know dip: 2221A, 4.5.1 tells you the vias have to be tented on both sides.
Electronics Forum | Fri Oct 14 08:12:48 EDT 2005 | lyrtech
For LUPO: speed: 4.5 inch alloy: 63Sn/37Pb Solder pot temperature: 500 Quantity of flux: just to wet the board
Electronics Forum | Thu Nov 16 11:40:03 EST 2006 | CK the Flip
I know Indium was big into the "ambient-to-peak" parameter, so now I know why. For their Sn/Pb paste, they recommended an EXACT number - I believe it was 4.5 minutes.
Electronics Forum | Thu Jan 18 21:45:34 EST 2007 | davef
Take this chance to update your documentation. See Appendix B in: http://www.jedec.org/DOWNLOAD/search/jstd033b.pdf How much fun is that going to be? As an alternative, maybe your supplier can save you the pain.
Electronics Forum | Thu Apr 05 16:03:38 EDT 2007 | beentheredonethat
Definitely recommend the Siemens F4/5 machine for your application. Based on experience I can say placement accuracy/repeatability is DNO (that�s Dead Nuts On). Good luck.
Electronics Forum | Mon Jul 14 17:55:16 EDT 2008 | gregoryyork
This could happen if your angle was wrong on the machine. If its a Chinese machine then probably 4 - 5 Deg. With the wrong angle the solder will only drain in one direction instead of both. cheers greg
Electronics Forum | Thu Dec 10 06:01:22 EST 2009 | gregoryyork
have you checked solder resist cure as this will cause the glue to lose adhesion if not cured correctly especially if dwell time sin the wave are excessive i.e 4-5 seconds cheers Greg York
Electronics Forum | Mon Aug 19 16:42:07 EDT 2013 | thanh567
W- HTLM-5 :Hydra tool length wrong for tool tube 3. expected tool length 4.5mm, tool length found -1.358mm any one out there know what to look for this issue? sensor?
