Electronics Forum | Thu Mar 29 14:43:22 EDT 2007 | jmelson
For a microscope, you want one with the greatest working distance and depth of field you can get. You don't want a lot of magnification, so something like 0.7 - 20 X is good. If you are buying new, have salesmen bring them by and actually try them
Electronics Forum | Sat Aug 05 12:12:05 EDT 2000 | Ramon I Garcia C
Hello Friends: I'm new in SMT process, I have a problem with little balls of solder beside of the component, I'm tried reducing the apertures in the stencil and making home base, some times the balls desappear, but some time not, and some times
Electronics Forum | Wed Jan 31 17:45:37 EST 2001 | dason_c
Hi! William, please check the new IPC-A-610 Rev C, para 12.4.10 for the soldeirng anomalies. Most of them may consider as process indicator and not the defect. The most common method to elimate the solder ball is to reduce the solder volume by red
Electronics Forum | Thu Nov 29 22:38:05 EST 2007 | shy
Hi Dback, Yes, i'm open "dog bone" aperture for my chip component. this is to prevent solder ball issue. For fine pitch i'm opening square with full length and half width to prevent bridging. Btw, if "dog bone" is not for chip component, what is your
Electronics Forum | Fri Jan 14 17:24:08 EST 2000 | John Thorup
Yeah, it would be kind of expensive to replace all of your stencils but it's the only real answer. Be sure that all your new and replacement stencils have a home base or home plate shape for the passives. This reduces the paste volume near the cent
Electronics Forum | Wed Nov 10 18:02:54 EST 1999 | John Thorup
Hi Dave Sounds like what we call a "squeeze ball". Usually caused by excess paste squeezed over the mask between the pads of the component when placed. This sometimes escapes the pull of surface tension back to the fillet and escapes to the side, us
Electronics Forum | Mon Oct 07 11:35:08 EDT 2002 | John
We use home-grown java based software to turn our remstar shuttles. Manages 8000 different part numbers on 3000 feeders. We are able to generate recipes which turns our shuttles and operators pull our feeders. Just did 5600 change outs in a 16 hour d
Electronics Forum | Tue Sep 24 12:49:43 EDT 2002 | dragonslayr
Aperture reduction @ 5 mils thickness is your best bet. It may take several attempts to get just the right paste volume. What aperture reduction was specified to the stencil house for these specific LEDS? or was the stencil blindly produced using a
Electronics Forum | Thu May 10 14:12:43 EDT 2007 | smtfan
Hi folks, This is my first time posting here. So I do not know clearly if I am posting in the right place. I have two questions: 1. I would like to know your comments about the following equipment (see links): http://www.madelltech.com/MD5001.html
Electronics Forum | Thu Nov 29 15:08:56 EST 2007 | jaimebc
Shy, You mentioned that you are using "dog bone" apertures for your chip components? It doesn't make sense to me. I thought that the "dog bone" was used for fine pitch devices, to keep the solder away from the center and avoid bridging. It doesn't
