Electronics Forum | Fri Nov 05 12:25:42 EDT 2010 | deanm
I think you are right. According to IPC-7526 section 6.2 says that using compressed air to blow out paste will damage the stencil, especially between fine pitch apertures. It can also broadcast solder paste onto other surfaces or personnel. I recomm
Electronics Forum | Fri Nov 05 13:58:23 EDT 2010 | chartrain
I agree that the tines (webs between apertures) can become damaged on fine pitch stencils from a blast of air. If they get bent, the stencil won't seat and gasket properly allowing bleed out of paste. Of course we all know that the air being blasted
Electronics Forum | Thu Nov 04 14:36:51 EDT 2010 | floydf
I need a second opinion. My operators us an air hose to clean out the aperatures in our stencils. It is my contention that this puts solder into the air, and could be harmful to us. It is the operators contention that I am crazy, and cite as proof
Electronics Forum | Fri Nov 05 06:58:04 EDT 2010 | scottp
I agree with the others - I just don't see the danger. We've been using air to help clean stencils for decades.
Electronics Forum | Thu Nov 04 14:48:48 EDT 2010 | spitkis2
You got my vote. I would not want to be on the other side of that stencil. Maybe your operators are just trying to save the company some money by collecting the excess solder paste and resuing it for future builds? I hope there are no bean count
Electronics Forum | Thu Nov 04 19:04:49 EDT 2010 | eadthem
It would depend on the solder paste but the stuff we use is heavy enough that it wont go airborne. and theres really no other way to clean the apertures on a 0402 or similar part.
Electronics Forum | Fri Nov 12 17:06:07 EST 2010 | dwong
I would also be concerned about spreading solder paste on the walls/floor/equipment downstream of the air. This would then get transfered to hands, clothing and shoes. In turn, tracked out to the rest of the floor/building or even to the home of em
Electronics Forum | Tue Apr 20 20:10:16 EDT 2004 | Indy
Hi Everyone, I am trying to stencil print chipbonder. The problem I am having is with the cleaning of stencil. The apertures are gettting blocked and cleaning with alcohol is not helping. Could anyone suggest a better way of cleaning the stencil. I
Electronics Forum | Wed Aug 25 19:44:35 EDT 1999 | Dave F
| Does anyone have any information on stencil aperture/pad ratios for noclean solder paste. In the past I have experienced severe solder ball problems when using the same size apertures from aqueous products as I do with the No-clean products. Cons
Electronics Forum | Tue Apr 20 23:14:51 EDT 2004 | Maneet
ou can use the air gun to clean the apreture.Also contact to your Glue manufactrure.
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