Electronics Forum | Tue Jun 01 18:06:36 EDT 2004 | Rob
I used an Ultraprint 2000 so if that's what you use then maybe I might be able to help. First, I'm assuming that you've already passed the Teach New Board section. This is board dimension, X and Y boardstop, stencil/squeegee heights and strokes. If
Electronics Forum | Thu Aug 12 22:38:44 EDT 1999 | Dave F
| Hello | | Having a problem with bridging on 20mil pitch qfp, only on the lead groups where squeegee goes over width of apertures. Using MPM sp-200 semi-auto, chem-etch stencil, 9-10mil width opening | 100 durometer blade. Getting "tails" on deposi
Electronics Forum | Thu Jan 02 15:32:26 EST 2003 | Mark
Hello. Sometimes metal squeegees DO work with stepped stencils. You will always get much better results with metal squeegees compared to polymer blades. The only requirement for the metal squeegee to work, you need about 0.06 in clearance for eve
Electronics Forum | Wed Sep 01 12:07:31 EDT 2010 | davef
Printing solder paste * Use single stroke, on-contact print cycle * Ensure the substrate is well supported, especially under areas of fine pitch print. * Select pressures of about 1- 2 lbs per linear inch of squeegee blade [Set squeegee pressure hig
Electronics Forum | Fri Mar 09 15:13:49 EST 2012 | davef
Care must be taken to not apply an excess of material, as the adhesive will flow under the device during placement and curing, and could cause a short. Printer setup: * Don't worry about stencil thickness. A wide range of stencil thicknesses (typic
Electronics Forum | Wed Oct 28 01:17:57 EST 1998 | Earl Moon
| SMT-ers | | I notice that most suppliers provide data that is eye-catching but avoid providing data of significant technical relevance, such as Cp and Cpk. It would perhaps be a wise idea for standards to be formulated in this area. | For
Electronics Forum | Thu Nov 20 20:47:58 EST 2014 | slouis2014
Well the stencil in question have shield components. And this stencil sometimes doesn't even reach 10,000 strokes.As compared with stencil that does not have shield components, the life span seems to be lesser considering that same squeegee, print pr
Electronics Forum | Mon May 06 12:44:50 EDT 2002 | Bob Willis
The SMART Group is starting a new project on PPM Monitoring which will be providing average PPM yield data per month free to the industry. I would like to get feedback or exchange criteria for paste printing as non exists with in IPC or similar organ
Electronics Forum | Sat Mar 29 15:29:06 EDT 2008 | aw
I am printing a ceramic paste through a 160 mesh screen that should have a theoretical wet print thickness of 53um but the only way I can get the print that thin is to increase down stop and slow the stroke. This is causing problems with the mesh, s
Electronics Forum | Sat Mar 18 02:21:31 EST 2006 | pavel_murtishev
Good morning, Once again a met annoying solder beading issue while producing board with PLL (leadless, contacts from the bottom side of the package). Board has very high placement density and beads appear near PLL package only. This package is finep
