Electronics Forum | Mon May 09 15:27:05 EDT 2005 | jdumont
We used the 92J a couple of years ago for a while. It performed very well for us. However when we started batch cleaning our assemblies the 92J post solder residue was not very easy to remove so we switched to Kester 256 which cleaned better. JD
Electronics Forum | Mon Mar 27 10:26:59 EST 2006 | slthomas
It seems highly unlikely that you could actually trap enough air in your paste for it to be releasing air after you've worked it a few times unless it's not rolling properly to begin with. I suppose maybe a contaminant could be present that could b
Electronics Forum | Thu Apr 22 17:19:57 EDT 1999 | JohnW
| | We process both tin/lead plated boards and gold plated boards in our surface mount group. I have used Sn62/Pb36/Ag2 solder paste on all gold plated boards to help prevent gold scavaging. To reduce the amount of different solder pastes we have t
Electronics Forum | Thu Sep 20 07:26:42 EDT 2007 | davef
Jimmy So, it sounds like your stencil and board are made to dissimilar versions. Choices are: * Buy new stencil to match the pads on the board * Tweek position of stencil to better match-up with the pads on board, ignoring the fiducials. You may be a
Electronics Forum | Fri Sep 21 10:31:44 EDT 2007 | russ
this would be meaniung that somewhere in your documantation it should have spec called "repeatability" what this means is that when the vision aligns the stencil/board, the board will always be within "x" amount of the njominal xy "T" position, some
Electronics Forum | Wed Feb 11 06:50:18 EST 2015 | mbartel
I knew jet printers where slower but I not that much slower. Right now I have a old Speedline Tech that Im looking to replace. Since Im new to this industry, Im cloudy on which companies make a good quality machine. I have a mydata pick and place, s
Electronics Forum | Wed Jul 08 03:43:27 EDT 2015 | pmcg
I'd also be interested in seeing what the OP went for too. We're thinking of upgrading our MPM3000 series. Has served us well over the years but is a bit dated to say the least. Not heard much about the SJ Inno. machines here in the UK. Would prob
Electronics Forum | Fri Jun 08 01:25:02 EDT 2018 | buckcho
Hello, good choice! Koh young makes great reports for cpk. Only one advice. If you take 50panels from production and your cpk seems low, try to group the different kinds of components. Because also cpk on a whole panel would be not good number as wel
Electronics Forum | Sun Jan 07 08:46:08 EST 2018 | spoiltforchoice
Your paste should specify a number of times it is OK for various things to happen. The two you might care about are the "Stencil Time"/"Working life", which is how long the paste can be out of the pot on your stencil while you print PCBs. The othe
Electronics Forum | Tue Oct 06 17:36:20 EDT 2020 | hearsehauler
Have used stencils for low volume paste printing for 18 yrs. New job uses jet printing (MY500). But machine is limited to .33mm dot size. Parts used here have pad sizes that are .25mm or smaller, so paste touches between pads when printed. Thankfully
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