Electronics Forum | Fri Oct 08 16:48:24 EDT 1999 | Charles Morris
| I recently had the opportunity to visit the vendor who is making my boards. On my trip I noticed that the guy who was in charge of the SMD placement machine (brand new Samsung) still had to manuallly place about 20%-40% of the parts after placement
Electronics Forum | Tue Mar 27 07:34:57 EDT 2007 | ck_the_flip
Amy, One way you can drastically lower the peak temperature of your QFP and prevent it from re-melting is to lower the solder pot temperature. If you're running 63/37 in your pot, the typical range for these is 460�F to around 500�F. You will need
Electronics Forum | Fri Dec 19 10:18:05 EST 2008 | dyoungquist
On TH parts we have been hand soldering. This last summer we purchased a Rhythm selective solder machine from RPS automation. I did a factory tour of both RPS and ACE since both facilities are about 1/2 mile from each other. In comparing the 2 c
Electronics Forum | Thu Mar 15 11:12:45 EST 2001 | slthomas
solder, but flux -> adhesive. Hmmmmm.... Are the chemists working hard to reduce the consequences of these possibilities? And as to Dave's comment about long term reliability issues due to outgassing from the adhesive, double-hmmmmmmm....... Ther
Electronics Forum | Fri Aug 16 06:39:12 EDT 2002 | Matt Kehoe
SIPAD solid solder deposit and glue dots is an excellent solution. www.sipad.com Matt Kehoe SIPAD Systems Inc
Electronics Forum | Thu Dec 18 12:05:14 EST 2008 | evtimov
dyoungquist, I don't think you understasnd the process. TH parts are the problem, not SMT. How do you proceed with your TH parts during last several years? Hand soldering? Emil
Electronics Forum | Fri Dec 19 11:42:17 EST 2008 | realchunks
Yes we are. They are considered the Cadillacs of spot solder - so they better work. But yes, we have never had a repeatability problem in 5 years.
Electronics Forum | Fri Dec 19 13:13:53 EST 2008 | evtimov
Dyoungquist, As I know RPS is doing that equipment from a long time and ACE is actually formed by x employees from RTS. KISS 104 looks exactly the same as RPS Rythm. :) The point is that if you want to use wave soldering machine, adhesive will be
Electronics Forum | Tue Mar 27 06:37:14 EDT 2007 | realchunks
There is no "standard" or "procedure". Your customer is putting a requirement on you because this has probably lead to weak QFP solder joints breaking in the field or non-functioning units due to co-planar QFP legs. I�ve been there done that. Had
Electronics Forum | Tue Dec 09 14:01:05 EST 2008 | evtimov
Hi Steve, first you have to decide if you need adhesive or you can go with solder. Usually depends on the TH parts. Otherwise dispensing is always more problematic process than print. I would go with the printer and stay away from troubles. It is f
