Electronics Forum | Thu Jul 21 07:21:47 EDT 2011 | ccouture
So far after ~1500 units printed with the stencil treated once with Rain-X, no issues were detected with solder joints. The only difference is no more solder bridges on fine pitch with .010" openings. The print is picture perfect on all pads, nice an
Electronics Forum | Tue Jun 28 14:06:08 EDT 2011 | dmiller
If you have room, and the aperture size will allow for it, try a 5 mil overall stencil thickness with a 1 mil step-up in the area of the BGA connector.
Electronics Forum | Wed Jun 29 12:07:11 EDT 2011 | kahrpr
These have been around for many years from a variety of manufactures. They work well and save a lot of space and will save some money on the stencils.
Electronics Forum | Thu Jun 30 13:00:14 EDT 2011 | scottp
I've been using a DEK Vectorguard frame for a couple months now and like it a lot. It uses air to clamp/unclamp the foil and both DEK Vectorguard and Alpha Metals Tetrabond foils fit the frame. Just about any decent stencil supplier sells Vectorgua
Electronics Forum | Thu Jul 07 08:21:27 EDT 2011 | scottp
I don't understand the long lead times comment. You should be able to get stencils next day.
Electronics Forum | Mon Jul 11 09:07:27 EDT 2011 | don7888
Long lead times was a slight exaggeration we wait approx 3 days for a stencil, although we can purchase them next day at a much higher cost. But when you are working to tight prdcution schedules this can prove costly.
Electronics Forum | Fri Jul 29 10:03:02 EDT 2011 | blnorman
At a previous location we used the Semco cartridges. Occasionally the operator would have to scrape down the stencil and knead the paste back in. That would keep the paste on the edges from drying out. It was just standard procedure.
Electronics Forum | Mon Aug 22 11:00:04 EDT 2011 | emeto
This problem means that you have too much paste. I would design a new stencil with reduced apertures. Emil
Electronics Forum | Thu Sep 01 09:34:08 EDT 2011 | ev
Looking for any feedback from those of you who have had any experience working with paste printers. How well do they work? Can we really get away from stencils? How do they handle fine pitch parts?
Electronics Forum | Sat Sep 24 16:42:23 EDT 2011 | tech1
I assume you mean dispensers? They are slow and limited on how fine they can go. Paste is much more expensive. The money you save in stencils will be eaten up by other consumable items on the dispenser. They are flexible but how flexible do you need
