Electronics Forum | Tue Jul 02 14:24:30 EDT 2002 | paul_bmc
My question is refering to "stencil life". How accurate is this and is this something I can go by. The solder paste I am using is Kester R562, R562 specifications state that it has a 12 hour stencil life, optimal temp ranges 70-77 F, 35-65% RH. Ou
Electronics Forum | Mon Dec 17 09:38:27 EST 2012 | cyber_wolf
Why scrap paste if there is no degradation of performance? Do your own study to determine this.
Electronics Forum | Sat Dec 15 06:34:54 EST 2012 | sowmya
Normally paste manufacturer specifies stencil life of a paste is 10 hours. the question is, if i run a continuous manufacturing for 40 hours, we will be adding 250 g of paste for every two hours. The addition of 250 g will be mixed with the paste whi
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 16:04:08 EDT 2002 | russ
We normally disregard what the "tech" sheets say. A lot of it has to do with your printer settings, prints per hour, placement time, stencil cleaning procedures etc... Just another wrench to throw in, We have noticed lot to lot paste differences al
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 03:26:57 EST 2014 | slouis2014
Hello, Can anybody tell me what is the life span of a stencil? How many stokes on the stencil is the maximum count to have PREDICTIVE maintenance on the stencil.Thanks
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 | Thu Nov 20 20:47:58 EST 2014 | slouis2014
Well the stencil in question have shield components. And this stencil sometimes doesn't even reach 10,000 strokes.As compared with stencil that does not have shield components, the life span seems to be lesser considering that same squeegee, print pr
