Electronics Forum | Wed Oct 12 11:02:59 EDT 2016 | hken
I think stencil manufacturers back fill half etched fiducials with black epoxy or something. I know I've had some worn and that's what I've done for my vision systems to be happy again.
Electronics Forum | Wed Oct 12 13:44:10 EDT 2016 | dekhead
Yes, bottom-side fids are usually half-etched with epoxy fill. just the half-etch gives a pretty "dirty" looking fid.
Electronics Forum | Thu Oct 20 12:33:39 EDT 2016 | cyber_wolf
We get our fids laser etched and never have fid read problems. They are black. (see attached) All of our printers are Momentums. Half etch and fill is old school. I used to take 2 part epoxy and mix black printer toner into it and squeegee the mi
Electronics Forum | Wed Jun 09 15:03:53 EDT 1999 | Earl Moon
| In past PCB designs I have cleared all traces from all layers | (except pwr/gnd) from fiducial area. It has come to my attention that this is only necessary on the side where fud is placed. Which is the correct method of design using a fidicial?
Electronics Forum | Mon Apr 26 03:00:43 EDT 2010 | fujiphil
Check the following... 1. Set the fiducial reading to SCAN... 2. Clean the half mirror of the fiducial camera... 3. Check the CCD Camera...maybe blown fuse inside. Hope this will help.... Good luck....
Electronics Forum | Mon Jul 13 07:25:09 EDT 2009 | hcarrasco
Hi everybody, > We recently start to use an ultrasonic stencil cleaners for our stencils. > It' work well, but after some time, we saw a lot of fiducial that the black > epoxy have been partially or totaly remove. I want to know if someone h
Electronics Forum | Mon Nov 12 16:14:47 EST 2001 | davef
Yes!!! How can we assemble boards with 20 pitch when we allow 0.008� error to the master art? Excellent question!!! IPC-D-300G has nothing to do with assembler requirements. It is written by and for fabricators, so that they can be comfortable.
Electronics Forum | Tue Feb 20 15:23:28 EST 2018 | dleeper
Proper fiducials are going to be more accurate than drill holes. Since drilling is a separate step in the PCB fab process, the registration to the PCB isn't as accurate as the copper etching process which forms the fiducials. In a pinch, it can be u
Electronics Forum | Thu Feb 15 16:46:07 EST 2007 | flipit
CK, That is the exact machine I had. I bought a Dek 265LT in 1997 or late 96. Was one of the first Dek 265LTs made. Never had to use epoxy blackened fiducials and it worked great with 1/2 etched or laser cut fiducials. Chris
Electronics Forum | Sun Oct 18 00:56:19 EDT 1998 | PARK KYUNG SAM
| I AM LOOKING FOR INFORMATION ON A WAY TO REPAIR STENCIL FIDUCIALS TO KEEP THEM SOLID AND AS DARK AS POSSIBLE.SOMETING THAT WOULD BE MORE OF A PERMANENT SOLUTION,I HAVE USED PERMANENT INK BUT IT EVENTUALY WIPES OFF OR FADES... HELLO MR NATE. I WO
