Electronics Forum: pasting (Page 1 of 955)

Stencil pasting in batches?

Electronics Forum | Mon Oct 07 23:04:05 EDT 2019 | SMTA-David

Hi, I have a semi-Auto paste stencil machine and use laser cut stainless stencil with T4 paste. When I start pasting boards the paste covers the pads and is well defined. Throughout the job we have been having some issues with feeder on pick and pl

Stencil pasting in batches?

Electronics Forum | Tue Oct 08 05:41:17 EDT 2019 | spoiltforchoice

I batch print boards, we're talking maybe 1/2 days worth at a time into a magazine. Its not a unique approach, especially if you don't run a fully inline process. However to do that you need a paste that has a decent tolerance of being treated that w

Solder Paste Testing

Electronics Forum | Fri Jul 23 10:20:03 EDT 1999 | Mark D. Milward

Has anyone ever heard of testing solder paste quality by pasting a board and making a determination of the quality by measuring paste height and width after the board is pasted. Would you consider this a valid test for solder paste testing?

Insufficient Solder Paste

Electronics Forum | Thu Dec 08 22:56:07 EST 2005 | davef

Questions are: * Is the stencil design proper to provide the correct amount of solder paste? * Is the stencil design proper to provide for release of solder paste? * Is solder paste filling the stencil aperatures, prior to separation? * Are stencil a

Sudden paste release problem

Electronics Forum | Thu Feb 10 09:14:09 EST 2005 | davef

Don't kid yourself, something has changed. * Worn stencils should produce better release and greater paste deposits than less worn stencils. * Consider inspecting the effectiveness of your cleaning process with a X10 magnifier. * Temperature in your

Viscosity Solder Paste for SMT Production

Electronics Forum | Mon Aug 22 09:35:54 EDT 2005 | cyber_wolf

First off, why do you feel you need to check paste viscosity ? I thought checking paste viscosity was a thing of the past ?? If you are having paste viscosity problems then it's time to get a new paste supplier. Any of the main paste suppliers have g

What will happen if a sloder paste is used after 24hours

Electronics Forum | Tue Jan 20 08:38:37 EST 2009 | davef

MrDif: You don't add fresh paste to used paste? We add fresh paste to used paste on the stencil to replenish the paste consumed while printing boards, so that we maintain a nice thumb-size roll of paste. We change the used paste when we clean the ste

Frozen solder paste.....

Electronics Forum | Fri Apr 29 08:39:01 EDT 2005 | davef

Few solder paste suppliers recommend freezing solder paste. Check with your supplier for recommendations. Examples are: * In many cases, nothing happens. However, some pastes are susceptible to damage that impairs paste performance. As a consequenc

Paste Push-Out In PP Assembly

Electronics Forum | Thu Jul 20 12:16:26 EDT 2000 | Dave F

Bob: On "paste push-out" (when inserting a component lead into a through hole pushes the paste out of the hole) in pin & paste assembly: * What factors affect paste push-out? * What techniques reduce this effect, given a board design and component

Re: Solder Paste Testing

Electronics Forum | Mon Jul 26 11:01:35 EDT 1999 | Kevin Hussey

Has anyone ever heard of testing solder paste quality by pasting a board and making a determination of the quality by measuring paste height and width after the board is pasted. Would you consider this a valid test for solder paste testing? I ha

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