Electronics Forum | Mon Dec 17 08:34:58 EST 2012 | emeto
I would scrap it. As you said part of it is going to be old paste. All manufacturers don't recommend mixing old with new paste because you change the rheology of the paste.
Electronics Forum | Tue Jul 02 15:50:28 EDT 2002 | blnorman
FIrst, be a doubting Thomas and never trust supplier propaganda sheets, do your own testing. How often do you knead the paste? We have a standing requirement that if the paste printer is idle for 30 minutes, we have a minimum of 4 kneads before pri
Electronics Forum | Mon Dec 01 02:54:05 EST 2014 | divia
Yes nano coating giving the good printing, but the stencil tension is very important for the life, 1st ensure the stencil tension...
Electronics Forum | Thu Nov 20 11:28:41 EST 2014 | markhoch
I've spoken with a number of Engineers about this subject and there didn't seem to be a consensus number. In my own experience, I found that we were replacing the stencils after approximately 30,000 print strokes. In my predictive maintenance spreads
Electronics Forum | Fri Aug 17 01:49:51 EDT 2018 | buckcho
Traceability can be made for many things. It is up to the factory and what it wants to implement. You can have traceability on the stencil for a several reasons: 1. Want to check stencil cycles 2. Want to verify if stencil is the correct one loaded 3
Electronics Forum | Thu Apr 19 11:03:42 EDT 2018 | dleeper
When your stencil foil looks like cooked bacon it's time to replace it.
Electronics Forum | Thu Apr 19 10:32:41 EDT 2018 | emeto
Hello experts, what would you recommend as a standard practice for stencil replacement? I am having here a stencil from 2004 that is worn out enough and has a small dent on the image, but still have to prove why I want to change it.
Electronics Forum | Wed Aug 22 10:08:28 EDT 2018 | emeto
If we don't take SPI machine is given in the equation, another control should be put in place. Buckcho your approach is interesting, but requires a lot of effort. Do you guys think the stencil printer can count the prints for the same program? Or eve
Electronics Forum | Fri Apr 20 07:41:19 EDT 2018 | stephendo
Show that it is cheaper to replace than to make bad boards that need rework. Surely you can get QC to complain about the boards pasted with that stencil.
Electronics Forum | Thu Aug 16 00:41:03 EDT 2018 | smt2020
Hey man, can you please suggest what you do for traceability system to count cycles of the stencil. Is there any special setup for that or just a Excel sheet with formulas.?
