Electronics Forum | Wed Apr 19 10:27:30 EDT 2006 | russ
Look at your paste specs, they give you recommended starting points relating to speed and pressure. Dave F is right, it is usually about 1 pound per linear inch of squeegee length. Speed for finepitch printing should be started at about 1in/sec. T
Electronics Forum | Fri Aug 13 18:38:47 EDT 2004 | russ
Your paste manufacturer will have the best guidelines for you. Different paste types and manufacturers sometimes/usually require a little bit different setup. I would also contact your printer manufacturer. As far as stencil concerns the larger/be
Electronics Forum | Tue Oct 27 12:31:24 EST 1998 | Sanjay Bhatikar
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 eg., ma
Electronics Forum | Fri Feb 18 16:08:35 EST 2000 | ScottK
John, As a supplier of squeegee blades, we ship them out in clear plastics tubes at the approximate length of the blade itself. The ends of the tube have simple slide-on end caps. After visiting many customers sites, I've found that most of them k
Electronics Forum | Fri Feb 18 16:08:35 EST 2000 | ScottK
John, As a supplier of squeegee blades, we ship them out in clear plastics tubes at the approximate length of the blade itself. The ends of the tube have simple slide-on end caps. After visiting many customers sites, I've found that most of them k
Electronics Forum | Thu Aug 12 22:31:10 EDT 1999 | Dave F
| Hello, | | Can any netters suggest what critical parameters should be considered & what are there assoicated impacts for a solder paste printing process ... | | B.Regards, | Felix | Felix: There are some 30 variables that affect SMT solder qua
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 25 09:56:59 EST 2007 | realchunks
Total Force is the weight on the squeegee blades. Generally you should set this by the length of blade you use. A 12 sgeegee blade would require a Total Force setting of 12 pounds. So, if you have 8 inch long squeegees, you should be OK. Your b
Electronics Forum | Fri Feb 24 08:29:25 EST 2006 | davef
Step stencils are not widely used, due to: * Higher cost as compared to uniform thickness stencils * Danger of solder paste smearing at least close to the steps * Difficulty of cleaning the stepped stencil underside (the steps cannot be on the upper
Electronics Forum | Wed Mar 23 11:40:21 EDT 2022 | SMTA-64388039
In my experience a distance of 30 mils per 1 mil in height above PCA nominal is sufficient for the squeegee blade to bend (in the direction of squeegee travel) so that you don't have excessive solder issues near the label. Labels are about 5 mils ta
