Electronics Forum | Mon Oct 25 21:19:06 EDT 2004 | davef
Q1: I thought we have a industry standard for this. A1: We're unaware of such a standard. IPC-7525 - Stencil Design Guidelines has a brief section on stencil inspection. We've talked about it previously on SMTnet. If you can't find it in the Archiv
Electronics Forum | Thu Jan 13 13:51:37 EST 2000 | Michael Uganecz
Hello, I'm doing some research on frameless stencils/stencil frames and I'm looking for people's thoughts on them. I'm looking for any and all thoughts/opinions on how well they work or don't work. Some specific areas of interest: tensioning in one
Electronics Forum | Mon Apr 21 16:39:50 EDT 2003 | k_h
You might try reducing your solder paste volume. To much solder paste gives the part a pool to float in, nullifying the positive effect of surface tension. I use an aperture on stencil for the heat sink which is 5mils reduced on each side and a 25mil
Electronics Forum | Mon Apr 09 13:28:06 EDT 2001 | slthomas
I've been wondering if I was the only person thinking this. There are so many print parameters that are programmable now on new machines (squeegee pressure, height, speed, snap-off settings, cleaning intervals) that the process would (in my oh-so-hu
Electronics Forum | Wed Oct 27 16:16:24 EDT 1999 | John Thorup
Hi Dave I have used the IIT proframe II (I believe the proframe I used four sided tensioning, was somewhat inconvenient to set up and is obsolete) for about six months. I don't have any complaints of note and I do use it to 20 mil. It does take som
Electronics Forum | Fri Sep 07 08:57:28 EDT 2001 | Hussman
Por, You talking wave solder or reflow solder? At wave, nitrogen is the way to go. Just like you stated, it does affect the surface tension. If you're reflowing, I wouldn't go nitrogen unless you have to. Improper stencil design is usually the c
Electronics Forum | Thu Jul 21 10:48:02 EDT 2011 | emeto
We use QTS and Vectour guard. I would prefer Vectourguard - it is very siple to set it up. However, you have to check the tension of the stencil everyday. I wouldn't trust them as 29 inch hard frame. It is always a metter of quantities. If you deal w
Electronics Forum | Tue Jan 28 07:46:34 EST 2020 | dontfeedphils
I've always been a big fan of the VectorGuard frame system, especially in high mix environments as it saves a ton of space in your shop storing stencils. Maintenance hasn't been a big issue for me in the past, just keep spares on hand if it's a conc
Electronics Forum | Tue Jan 28 10:22:02 EST 2020 | emeto
Phil from the picture attached you see the challenge - there is no marking to show you which stencil is what. That is why people keep it in a box- to be able to see the number. I used VG for long years and I never liked them. Also with high changeove
Electronics Forum | Fri Jul 21 01:50:04 EDT 2023 | auriga2001
The purpose is explained in the program 'help' - 'contents' menu. Due to viscosity and adhesion of different fluxes, paste may stick to the stencil more than the board. Using steps allows the surface tension and gravity to pull the paste down; rather
