Electronics Forum | Thu Mar 30 03:45:04 EST 2006 | dd
Hi all, Can anyone explain the main difference between using a 45 degree squeegee angle over a 60. thanks in advance d
Electronics Forum | Fri Nov 12 03:57:17 EST 2004 | pioneertechnology
Hi All For the past 8 years we have been screen printing paste succesfully using hard rubber blades. Over the past 12 months we have changed paste from lead to lead free, the board size has changed from 300x200mm to 120x90mm and we have also moved
Electronics Forum | Mon Mar 05 23:10:56 EST 2001 | flynhi34
Hi, I always thought 45 deg squeegee blades were the way to go for solder printing. What are everyones opinions? Does anyone think that 45 deg blades will help prevent solder paste from sticking on the squeegee blades since equal amounts of paste
Electronics Forum | Wed Mar 07 02:34:10 EST 2001 | Cosine Theta
Strange? Can u explain why magnetized squeegee be a factor, not to mention rusty squeegee?
Electronics Forum | Tue Mar 06 19:33:28 EST 2001 | jhingtgen
DEK wrote a paper that compared 45 degree blades vs 60 degree blades. This paper was presented at APEX 2000 by Jay Hinerman. Email me at jhingtgen@dek.com and I will ensure you get a copy.
Electronics Forum | Thu Mar 15 09:30:01 EST 2001 | keith47611
We've actually seen best results with 60 degree blades (as measured from stencil surface to face of blade), and paste sticking has not been a problem since we switched to a higher quality metal blade. More expensive than the OEM stuff but worth it.
Electronics Forum | Tue Mar 06 09:28:30 EST 2001 | davef
You're correct 45� is preferred. 5 Paste sticking to squeegee: * Squeegee is heavily magnetized * Some pastes stick more than ... * Plastic squeegees stick more than metal * Old metal squeegees stick more than new * Paste needs to be worke
Electronics Forum | Wed Mar 07 20:43:55 EST 2001 | davef
Sure, the rolling action of the paste creates a weak magnetic field surrounding the paste. This is similar the field created by electric current flowing through a wire, as first described by James Maxwell. After creation of the magnetic flux, the m
Electronics Forum | Tue Apr 06 10:30:48 EDT 1999 | Scott Davies
Tony Although I agree in principle with Dean that 45 Degrees would be ideal, most of the squeegees I have worked with have been 60 Degrees to the stencil surface. This seems to work best with metal squeegees when printing HASL boards, because the sl
Electronics Forum | Fri Apr 02 22:01:19 EST 1999 | Dean
| Anyone knows what is the optimum squeegee angle for screen printers. | | 45 Degrees. The forward velocity creates a downward pressure equal to the vector pressure (equalibrium). This is commonly known as paste "rolling action". Too obtuse an an
