Electronics Forum | Thu May 04 13:20:55 EDT 2023 | tommy_magyar
We do the same as dontfeedphils, with the difference being that it goes through a drying program too after stencil wash program (3 mins @ 90 degrees air spray) to dry out the via holes and any trapped liquid from under the components.
Electronics Forum | Fri May 05 15:41:54 EDT 2023 | proceng1
At the beginning, we absolutely do this with the first board. However, we do have some problem child jobs where we end up wiping 1 in 5 prints. When searching the topic, most of what I got was "ultra-sonic" cleaners, but that isn't recommended for
Electronics Forum | Thu Sep 04 10:43:44 EDT 2008 | mrmaint
Surface wiping will not clean your board. Look under a scope and you will see paste in the vias.
Electronics Forum | Thu May 30 12:27:25 EDT 2013 | ericrr
I was more interested to read up on paste, As for the short run of 50 panels was finished, the panels dribbled out slowly. about three times the second day I took off the paste, mixed it up and put it back on, seems to do the trick. Also I gave ea
Electronics Forum | Wed Jan 03 08:22:08 EST 2001 | G. English
Hi, all the best to you smt' netters for the forthcoming year. I am looking for a one stop shop for surface mount consumables, in particular, stencil IPA wipes, printer under screen cleaning rolls, gloves, dry wipes, squeegee blade replacements etc
Electronics Forum | Tue Jun 04 13:13:58 EDT 2002 | slthomas
Another thing we see is solder balls (sometimes fines, sometimes larger stuff) in the vias after a misprint has been poorly cleaned, as in wiped down but not washed. They end up in the plated through holes too, but those get nicely cleaned up in the
Electronics Forum | Wed Sep 01 12:58:42 EDT 2010 | scottp
A good paste will print fine up to 5 in/sec or so. They key, as mentioned, is to get the pressure right for a given squeegee speed. If the squeegees aren't giving a clean wipe then you'll see huge variation in print volume which can lead to shortin
Electronics Forum | Tue Feb 16 08:54:57 EST 1999 | Ross Berntson
| I am fairly new to the SMT game and I am getting conflicting answers to the following. Maybe someone can help me! When printing, one person is telling me that the stencil should be wiped completely clean of all paste because the quality of the
Electronics Forum | Mon Aug 06 09:55:32 EDT 2012 | dyoungquist
Techspray makes a liquid called "Eco-Stencil SMT Stencil Cleaner" and also pre-saturated wipes by the same name. We spray the cleaner on the stencil and then use the wipes to clean the paste off of the stencil. Putting 1 wipe in each hand and rub
Electronics Forum | Thu Feb 27 12:41:21 EST 2020 | duke211
look at the specs of your solder and stencil life. Check the humidity, low humidity dries the paste. Slowing down your swipe speed and frequent wipe cleaning of your stencil can help.
