Electronics Forum | Fri Oct 25 14:46:50 EDT 2002 | russ
Leading edge, This is used to determine the orientation of the board as you want to run it. If you use center justified stencils this is usually not an issue since you can just turn the stencil any which way you want to. If you are using front/rear
Electronics Forum | Fri Oct 14 14:09:19 EDT 2005 | bschreiber
Your problem is not the 0.4 pitch. Your problem is the manual cleaning. Manual cleaning will only remove the solder paste from the surface of the stencil. What's more, manual cleaning will force additional contamination into the 0.4 pitch apertures
Electronics Forum | Mon Feb 25 13:12:20 EST 2008 | bschreiber
Hello CarlN, Yes, StencilScan can reverse engineer a stencil, screen or a board. We just take a high resolution scan of the stencil/screen/board and the software does the rest. Another cool feature is the Assembly Module option for producing assem
Electronics Forum | Thu Apr 22 12:46:41 EDT 2004 | Mark
What type of chip bonder you use? I use Loctite 3611... part #25410 on my stencil screening and use epoxy cleaner, air hose and that takes care of our issues. If you use alchol it just hardens the epoxy so make sure its cleaned out good before restor
Electronics Forum | Mon Feb 18 13:54:38 EST 2008 | bschreiber
Most stencil manufacturers use an automated stencil inspection system like our StencilScan AOI that compares the Gerber data directly to the stencil image. We provide the StencilScan AOI system to end users that wish to guarantee stencil / screen an
Electronics Forum | Tue May 02 14:19:26 EDT 2000 | Bill Schreiber
There are two primary causes of epoxy adhesive bond failure, heat and over exposure to moisture. Ultrasonic cavitation is a only a mechanical "scrubbing" action on a microscopic level. However, if the adhesive bond is week or has small areas of det
Electronics Forum | Tue Jul 02 14:24:30 EDT 2002 | paul_bmc
My question is refering to "stencil life". How accurate is this and is this something I can go by. The solder paste I am using is Kester R562, R562 specifications state that it has a 12 hour stencil life, optimal temp ranges 70-77 F, 35-65% RH. Ou
Electronics Forum | Thu Mar 29 18:14:19 EST 2001 | kerryn
Hi Dave, I looked into the South Coast Air Quality Management District Clean Air Solvent Certification when I was having my problems with VOCs. The problem with the SCAQMD CAS Certification is that it only certifies chemicals as they are found in t
Electronics Forum | Fri Mar 22 14:34:16 EDT 2024 | carl_p
Used a Gen 3 system for screens & boards. TDC for inline washing.
Electronics Forum | Fri Sep 17 08:03:04 EDT 2004 | soease
Hi Simon, thanks for answering so fast. Well, our company is building several different products to monitor turbine activities (power generation and propulsion). So our boards are equipped with mixed technologies including minimelfs, 0402 chip resis
