Electronics Forum | Thu Oct 04 10:22:56 EDT 2012 | ericrr
By the way how are PCB's made (briefly)? During my radio apprenticeship in the 70's I made PCB via the screen printing method, The other method for say one off or small volume is the photo-etch. Is there a third high tech method, or just a updated
Electronics Forum | Fri Dec 20 04:07:25 EST 2002 | Roger
Although everything that has been said earlier is sound advice for achieving good printing results, I strongly believe your problem is your manual printer and its inability to accurately control the speed at which the PCB separates from the stencil a
Electronics Forum | Fri Jan 21 06:35:51 EST 2022 | stivais
"Manual washing" of a misprint board basically is smearing of printed solder paste all over the board. And trying to remove (wipe off) it afterwards. So for me it would not be any surprise that the solder paste ended up on the pads where it was not i
Electronics Forum | Thu Jul 07 11:52:25 EDT 2016 | proceng1
We just pulled a Speedline Accuflex printer out of storage. After programming a board and stencil, and calibrating the fiducials and everything, we do a test alignment and bring the board to print height. It is off. I've done it now with two diffe
Electronics Forum | Tue Sep 22 08:03:49 EDT 2015 | mervin
Hi. I have recently purchased a old MPM UP2000. I can not get it print correctly consistently. It goes off after 5 Pcb's and remain that amount off for another 5 Pcb's. Then it goes more off and remain like that for another 5 Pcb's. If you stop and e
Electronics Forum | Fri Sep 17 15:43:08 EDT 1999 | Dave F
| HI everyone, | | We are using a Siemens ap-25 screen printer, in the past we have not had any problems with adhesive placement until a couple of weeks ago. It seems the x axis has decided that it should be set somewhere between .00085 and .001
Electronics Forum | Fri Sep 17 21:25:00 EDT 1999 | Rob
| | HI everyone, | | | | We are using a Siemens ap-25 screen printer, in the past we have not had any problems with adhesive placement until a couple of weeks ago. It seems the x axis has decided that it should be set somewhere between .00085 an
Electronics Forum | Fri Jul 18 11:59:10 EDT 2014 | jagriffin
The good thing for me is I will not have these around for very long and they are prototypes.... We build fast and send them on to our EE's! What I have found to be my challenge is the wiping off of the miss prints on the first side... What I have rea
Electronics Forum | Fri Apr 23 07:50:50 EDT 2004 | smtpro
We have switched over form Indium's nc-smq92 to nc-smq92j and are experiencing a ton of solder balls. Even if the print is dead on we still seem to be getting them. We never seemed to have this problem with old paste unless the print was way off. Is
Electronics Forum | Mon Oct 31 03:42:47 EST 2005 | pavel_murtishev
Good day, Problem appears only with 0.5mm pitch components. Print quality for these components is unacceptable. Paste type isn�t new for us. No any tape on the bottom of the stencil. We apply enough pressure on squeegees, stencil remains clear after
