Electronics Forum | Tue Jun 28 02:37:17 EDT 2005 | grantp
Hi, Check to make sure your paste is not dried up, and it should roll across the stencil, not slide. Also, if your running in a cold environment, then that can stiffen up the paste, and it will still to the blades, and not roll over the stencil corr
Electronics Forum | Mon Jun 27 11:24:03 EDT 2005 | russ
What size paste roll do you have on your stencil? It should be about 1/2" in diameter. What type of paste are you using? I have found that certain Mfgrs have this problem with some of their formulations. What typoe of printer and what is your squ
Electronics Forum | Mon Jun 27 11:06:20 EDT 2005 | geb
Do you know why my solder paste sticks to the squeegee so much that it mis-prints and how can I prevent it from happening. I can only get about 3/4 prints before this happens.
Electronics Forum | Wed Jun 29 12:52:12 EDT 2005 | jdumont
We also had issues with paste sticking on our Trans Automation printer and switched to the Permalex blades. That made the biggest difference with release. They are a little pricey but it was worth it.
Electronics Forum | Mon Jun 27 11:32:45 EDT 2005 | sumote
Humidity level can play into this as well. Good blades will help the process. We use permalex blades from Transition Automation and we love them. YMMV
Electronics Forum | Mon Jun 27 14:09:25 EDT 2005 | davef
We've talked about this previously on SMTnet. Try searching the fine Archives. For instance: http://www.smtnet.com/forums/Index.cfm?CFApp=1&Message_ID=5473
Electronics Forum | Thu May 26 16:41:00 EDT 2011 | scottp
Here's what I do: - Test Surface Insulation Resistance (we're in the high reliability market and use a test significantly harder than IPC's). I also test SIR in combination with other assembly materials like conformal coatings and wave solder flux
Electronics Forum | Fri Aug 23 01:40:14 EDT 2019 | sssamw
Such huge difference between low and high thickness will definitely cause paste accumulation on the squeegee side. Normally is 2 mil max difference.Yes, dispense maybe help for thicker paste or print two times.
Electronics Forum | Mon Aug 19 13:47:45 EDT 2019 | emeto
Forget about a stencil here. The only solution I have for you is to dispense this paste. There are some super cool Jet printers out there that will do the job.
Electronics Forum | Mon Aug 12 12:16:25 EDT 2019 | SMTA-Martial
Hi, We are using a 15mils to 5 mils step stencil with a metal blade. The 15mils area the surface is smooth and polish and in the 5mils area the surface is rough and porous because of the laser process. In the 5 mils area where there is no aperture t
