Electronics Forum | Thu Jun 06 07:28:30 EDT 2002 | cyber_wolf
It has been my experience that the only thing(s) that will ever cause this is: 1. Operators with paste on their hands. 2. Paste on the screen printer tooling. 3. Paste on the bottom of the stencil. Even very very small amounts of paste on the gold fi
Electronics Forum | Thu Jun 06 09:45:14 EDT 2002 | Hussman69
We based ours on the type of paste we use (stencil life) and not so much the machine. Then we coupled that to what 'true' conditions we normally see in our plant, and determined that under these conditions Max & min) our printing process should be g
Electronics Forum | Thu Jun 06 21:35:22 EDT 2002 | ianchan
Hi mates, 1) Firstly, thanks for everyone's reply to this thread. Cheers! 2) Secondly, Hussman69: sure u dun mean that blokes' tie was too tight? musta cut off his blood flow and oxygen?!? 3) Thirdly, we checked with our paste supplier, and they r
Electronics Forum | Thu Jun 13 06:08:57 EDT 2002 | edahi
guys thanks for the suggestions... DaveF, *Changing paste EricD: Yes we are considering that as a point. Because I believe the paste we are using are in syringe packaged and designed for dispensing. We are using an Indium SMQ75 paste and current
Electronics Forum | Mon Jun 24 18:45:06 EDT 2002 | jersbo
I have done experiments on small runs, with a few connectors and have had favorable results, I had apertures (oversized)made for the thru-hole connectors on our SMT stencil and hand inserted the connectors.. A few insufficient solders here and there
Electronics Forum | Wed Jun 26 01:01:24 EDT 2002 | ianchan
Steve, Dason has valid points here. dun listen to what supplier's say about paste lying on the PCB pads able to be exposed at ambient temperatures for 8-24 hrs? that will never get approval for Class-3 type of customer auditors. (Would any serious
Electronics Forum | Wed Jun 26 11:29:53 EDT 2002 | slthomas
Go to the top of the page and enter your topic in the "Search SMTnet" window. It can take some tweaking to get it dialed in to the exact topic you want. Do you mean the paste was on site for 3 weeks, or was it actually out of the fridge for 3 week
Electronics Forum | Wed Jul 03 07:40:48 EDT 2002 | Yannick
Hi, WE are making some test with this kind of component and aperture and here what we think. when you use a home plate aperture it's seem that the component is not lenght enought to have a good solder but maybe is our CAD guy that didn't make a
Electronics Forum | Sat Aug 03 08:44:11 EDT 2002 | P. Kannan
We are having 3 MPM UP-2000 printer & 1 AP-25 printer with us. I would like to have the technical guidance for my following application. For one of our model, there is a requirement of Glue & solder paste on same side of the PCB. Currently we are u
Electronics Forum | Mon Aug 12 12:05:35 EDT 2002 | russ
I use Paste for high temp balls and/or co-planarity/warpage issues. normally I only use paste flux for ball attachment. One down side to paste application is registration and volume anomalies with those little micro-stencils (for me anyway). Your
