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black fiducials

black fiducials

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Hello everybody. I can't get black fiducials when laser-cutt... - Oct 12, 2016 by andremoris

I think stencil manufacturers back fill half etched fiducial... - Oct 12, 2016 by hken

Yes, bottom-side fids are usually half-etched with epoxy fil... - Oct 12, 2016 by DEKHEAD

OLD DEK manuals actually have a procedure for fiducial fill,... - Oct 12, 2016 by DEKHEAD

Yes, I read about filling the fiducials with balck epoxy, bu... - Oct 13, 2016 by andremoris

Basically, what is the main issue which requires you to use ... - Oct 20, 2016 by fadzril

We get our fids laser etched and never have fid read problem... - Oct 20, 2016 by Sr. Tech

> Yes, I read about filling the fiducials with > bal... - Nov 09, 2016 by SuMoTe

Why would they wear off? Many people use ultrasonic stencil ... - Nov 16, 2016 by A Very Frazzled Man

andremoris

#76450

black fiducials | 12 October, 2016

Hello everybody. I can't get black fiducials when laser-cutting a SMT stencil. They are grey or beige but never black. Can someone help me? Thanks!

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hken

#76455

black fiducials | 12 October, 2016

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.

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DEKHEAD

#76458

black fiducials | 12 October, 2016

Yes, bottom-side fids are usually half-etched with epoxy fill. just the half-etch gives a pretty "dirty" looking fid.

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DEKHEAD

#76459

black fiducials | 12 October, 2016

OLD DEK manuals actually have a procedure for fiducial fill, and they used to sell a kit (for way too much $$$$); since usually pretty well covered by stencil vendors probably not on the list any more.

www.dekhead.com

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andremoris

#76463

black fiducials | 13 October, 2016

Yes, I read about filling the fiducials with balck epoxy, but it was said that it doesn't last for long. Thank you for your reply.

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fadzril

#76484

black fiducials | 20 October, 2016

Basically, what is the main issue which requires you to use black fiducials? Stencil mark recognition issues?

Solder printer machines have ability to adjust the brightness or contrast.

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Sr. Tech

#76487

black fiducials | 20 October, 2016

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 mixture into the fids with a razor blade to fix them.

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