Electronics Forum | Fri Jun 18 10:24:12 EDT 1999 | John Thorup
| first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads. an
Electronics Forum | Fri Jun 18 11:33:16 EDT 1999 | Brian wycoff
| | first of all what is the technical term for the small amount of solder on a plated pad. we are getting poor screen printing gasketing on a 20 mil qfp due to this solder not being even or too high in spots and not covering the length of the pads.
Electronics Forum | Thu Dec 16 15:00:20 EST 2004 | glaucon
Simple differences. Both processes require a very similar machine platform, controlled motion, vision fiducial recognition and alignment of a substrate (PCB or hybrid ceramic) to the "image", the image being either a stencil (hence stencil printing)
Electronics Forum | Fri Jul 05 18:55:25 EDT 2024 | jdengler
Note that not all pastes are equal. You need to test the paste you use to see how long it continues to print well. I have used paste that prints the same after 24 hours on the stencil and some that barely makes it to 8.
Electronics Forum | Tue Aug 19 14:24:22 EDT 2008 | shanenaturalpoint
My first problem is that when the unit homes, the print carriage seems to be traveling too far back. After the carriage reaches its mechanical limit, it continues to try and move back, eventually throwing up a print carriage error. Any ideas?
Electronics Forum | Thu Aug 27 09:29:04 EDT 2020 | serge_pirog
Yes, I calibrated the height, no error. How can I check that pressure was compensated? If we press button "continue" after some cycles of printing system will show "error".
Electronics Forum | Fri Mar 26 23:07:07 EDT 2010 | dekhead
Just a guess: Are you printing your fiducials on the fiducial side of the board? Fidicial Side is for Vision Calibration, Bare Copper Side is for Offset Calibration (Step 5 of procedure says "copper side uppermost"). After printing 25 fiducials o
Electronics Forum | Thu Aug 27 14:32:34 EDT 2020 | dekhead
Following a pressure error, if continue is pressed, the next print with THE CORRESPONDING squeegee should attempt to compensate by increase or decrease in pressure (as appropriate)... Is it: 1)Not changing at all? 2)Over compensating? 3)Under compens
Electronics Forum | Fri Sep 30 03:36:39 EDT 2005 | pavel_murtishev
Good day, 2D inspection requires correct adjustment. In the other case it will cause continuous problems and false alarms. Adjust the lightning first and choose the correct process limits second. Look at histogram when you are adjusting the camera
Electronics Forum | Wed Jun 27 21:33:09 EDT 2001 | davef
There was a similar thread last week on SMTnet. Maybe the poster of that thread can help. Not everyone responds on-line. Check the SMTnet Archives for generalities and platitudes about PIH, although there may be some good links. Baring the obviou
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