Electronics Forum | Mon Aug 23 10:11:55 EDT 2010 | flipit
Hi, I have never been able to find an acceptable dispense process for dispensing small dots of solder paste. I currently have an auger screw automated dispense system and can not accomplish 0.010" dot sizes. In addition, stencil printing is much m
Electronics Forum | Tue Sep 24 12:58:27 EDT 2002 | dragonslayr
Although focusing on solderability may be the right answer, I wonder if you are satisfied that co-planarity is not the root cause. With random events of contact opens, this may be the case. Cleanliness of the stencil can also be a source of your pr
Electronics Forum | Thu Mar 23 10:02:09 EST 2006 | Joe
Check placement pressure. I agree with the "smushing" theory. If you can place the component with less pressure, I'd do that first. A switch to Type three paste is also a good idea, as long as your minimum aperture dimension remains at 0.009" as you
Electronics Forum | Thu Jun 21 22:04:18 EDT 2001 | davef
This is my attempt at beating the "Fuzzburg 7" translator used on the SMTnet Forum that mashes everything it sees. Below the next paragraph are three paragraphs,each with a common numering sequence, where each paragraph represents the columns of a t
Electronics Forum | Sun Sep 13 09:21:26 EDT 2009 | davef
You as, "What data is available showing the long term reliability of the intermetallics of the solder joints?" Alloy||Microstructure Sn-Pb||Lamella or globules Sn-Cu||Sn-matrix, Cu6Sn5 needles or globules Sn-Cu-Sb||Sn-matrix, cuboids of SbSn and Cu6
Electronics Forum | Fri Jun 04 16:30:10 EDT 2010 | jdm2008
I am running a cemelot 5000 and I am having trouble with the solder clogging up the needle. When the solder is removed it almost appears if it has reflowed. I am using a 22 guage needle, and the problem occurs with both type 3 and type 5 solder pas
Electronics Forum | Sat Jun 05 14:20:10 EDT 2010 | davef
It's a common problem. Try using a different needle diameter. Paste type||Suggested needle size II||21 or larger III||23 or larger IV||25 or larger V||27 or larger VI||30 or larger Additionally, improper clearance between the auger pump screw and t
Electronics Forum | Fri Nov 26 06:18:18 EST 1999 | stefano bolleri
Jeff & Ted, we have used a dispensing system too and yes, I agree, we are not too happy with the results. Not at the point that it doesn't work, though. I think our problem basicly is that we have selected an entry-level dipensing system. We are app
Electronics Forum | Mon Jan 24 04:26:32 EST 2005 | Hannu
Morning all, Has anybody done any pin in paste job with a dispenser? I read somewhere that the needle i.d. should be slightly larger than the hole diameter, but with holes of 1.4 mm I would have to work with a very large needle indeed. How does past
Electronics Forum | Fri Jul 30 17:17:08 EDT 2004 | cvega
GPD Global provides a line of system to for small volume solder paste and condutive adhesive dispensing know as the MicroMax. Our systems have an accuracy of 0.001" at the needle tip, capability of two valve mountings, integrated closed loop needle
