Electronics Forum | Wed Jun 14 01:52:57 EDT 2017 | bukas
I have been using IPA for more than 3 years with no damage to stencils. what some cleaning solvent manufacturers claim is that you get better separation with their products, some even recommend nitrating stencil to enhance separation and avoid paste
Electronics Forum | Thu Sep 07 11:39:39 EDT 2017 | swag
Two magic bullets help us greatly with fine pitch printing: 1) nano coatings (we use a DEK product) YES it really does work 2) temperature control in the printer (AC unit). Of course good quality stencil and proper cleaning of the stencil are im
Electronics Forum | Fri Feb 16 10:25:31 EST 2018 | ameenullakhan
Hi Rob, Thanks. We have very high mix low volume products. Even our stencil suppliers have problem to fix. So we are landing up getting one more stencil after checking the issue in NPI build. we are trying to add up all and have guideline. which i
Electronics Forum | Wed Feb 28 10:44:06 EST 2018 | jdengler
If you need to make changes to a stencil that many times someone is not doing their job properly. In the past 16 years I have had 3 line stoppages due to stencil issues. 2 of those were because the board house made the panel differently than the fi
Electronics Forum | Wed Aug 22 10:08:28 EDT 2018 | emeto
If we don't take SPI machine is given in the equation, another control should be put in place. Buckcho your approach is interesting, but requires a lot of effort. Do you guys think the stencil printer can count the prints for the same program? Or eve
Electronics Forum | Tue May 22 08:23:55 EDT 2018 | dleeper
metal blades scraping against a metal foil; do it enough times and any stencil will look like that. It's possible the squeegee pressure is set too high, exacerbating the condition. Try reducing squeegee pressure a little at a time, making sure you
Electronics Forum | Thu May 31 06:25:23 EDT 2018 | cyber_wolf
Diego, In my opinion you are wasting your time testing. Set the squeegee pressure until its just cleaning the stencil off. That is the correct pressure. Unless you are getting failures at SPI (if you have SPI) or getting solder defects don't worr
Electronics Forum | Sun Nov 24 13:34:44 EST 2019 | majdi4
Hello Guys, I'm new here. I am smt process engineer in a company located in Tunisia. I am looking for a means of measurement to control: thickness of serigraphy stencils , dimenal measurement of apertures . STENCILS with stainless steel material.
Electronics Forum | Thu Jan 09 17:28:07 EST 2020 | dwl
2-3 weeks? wow! I've had stencils last over a decade and only needed replacing because the adhesive holding the mesh dry rotted and crumbled. Of course build volumes were in the order of 50-100 per year. Just goes to show there is no easy answer f
Electronics Forum | Thu Jan 09 18:26:21 EST 2020 | spoiltforchoice
Much like DWL we have multiple stencils that are really quite old (~2003 and still in use) and are perfectly OK. In fact I don't think we've ever worn one out, higher volume designs are far more likely to get a layout change before the stencil gets
