Electronics Forum | Fri Nov 19 14:40:48 EST 2004 | glaucon
The R.H of 28-30% is too low! (What about ESD issues?). Have them check to see if the printer/print area has a "breeze blowing" accross it, they can disconnect fans inside if needed to limit airflow from drying the paste out.
Electronics Forum | Wed Aug 03 08:42:02 EDT 2005 | ianlg
Hi Here is one that can handle the size board that you are looking to print. http://www.reprintservices.co.uk/R29_Series_Screen_Printer.html Hope that this is of help. Regards Ian
Electronics Forum | Thu Nov 01 10:09:18 EDT 2007 | slthomas
Lke Pete C said it's specified by the manufacturer of the paste, but it's also board specific. We print a lot faster on boards with nothing smaller than 50 mil pitch than we would on 16.
Electronics Forum | Wed Nov 04 06:47:22 EST 2009 | davef
There may be supplier guidelines or accepted practice, but there is no shear specification for printing either paste or glue. Beyond the issue of not knowing the shear value, what's the problem that you see when printing glue?
Electronics Forum | Sat Oct 07 10:10:28 EDT 2017 | tsvetan
Did you check the printing head wearing time? If I remember correct the head needs replacement after few KG of paste printing this means buy new head each few days in real production quantities. Beside for prototypes they are extremely expensive to
Electronics Forum | Thu Dec 09 21:46:22 EST 2021 | dwl
Totally agree with Evtimov. Let the SPI be the judge, as long as your getting good prints, your stencil is fine. I had a colleague cut the mesh on one side of a stencil and it still printed fine. This was proof to management that measuring tension w
Electronics Forum | Fri Dec 16 04:41:30 EST 2005 | tk380514
A day and half is a life time for our solder paste, Almit V14L... but then we dont have in-line solder paste printers, we have micro BGA stencil that wont work with anything but new solder paste, 0.8mm pitch and pad size is 0.3mm, stencil thickness
Electronics Forum | Thu Jun 25 14:45:55 EDT 1998 | Chrys
| I have a single-sided board with test vias that pass through the board. The test vias are pasted and reflowed with the SMT components on the top side. When the boards are wavesoldered, the solder coverage on the vias is spotty. Some will sold
Electronics Forum | Tue Nov 01 19:53:23 EST 2005 | KEN
Um...for you mylar guys....esd safe? Why worry about the first two prints. Worry if they power up or not when sent to funcitonal test. Zapp! I think I know where this is comming from. It is not that uncommon to have a sacrificial print. However,
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
