Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Stencil fiducials


GEB

#35072

Stencil fiducials | 22 June, 2005

Do the fids on a stencil need to be in the same place as the fids on the PCB for it to be able to print?

Thank you

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??

#35073

Stencil fiducials | 22 June, 2005

If you are using vision to correct on the printer and you are using the fiducials....then......yes

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Claude Couture

#35074

Stencil fiducials | 22 June, 2005

Depends on the printer. Look into your printer's manual under specifications.

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GEB

#35079

Stencil fiducials | 22 June, 2005

Don't have the manual (which is useful!) but suspect thats what the problem is. Anyone know where I could get a manual for an MPM Corporation AP-27 printer, can't find the company's website in Google.

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#35080

Stencil fiducials | 22 June, 2005

The fids do not need to be in the same place, but it is much easier to get good alignment if they are. It will become trial and error if they are different.

Jerry

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RDR

#35082

Stencil fiducials | 22 June, 2005

MPM is speedline. speedline.com

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??

#35084

Stencil fiducials | 22 June, 2005

use pads if you suspect thats what the problem is!!!!

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slthomas

#35085

Stencil fiducials | 22 June, 2005

I don't know how your printer could match the board's alignment to the stencil if they aren't. If you don't have fids on both board and stencil that match you'd have to use pads, but then you've got apertures thrown in to the mix.

If that's the situation, make sure you clean often (I hope you have a vacuum wiper on that machine) so that paste in the aps doesn't affect the alignment.

Just my take based on EKRA experience, but I'm assuming they all use similar arrangements for vision alignment.

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pr

#35086

Stencil fiducials | 22 June, 2005

Yes, They do have to be the same. If not you'll have to put in some ridiculous offsets. If they are not located in the same place (as mentioned earlier) use 2 pads that are off by themselves (if possible) and increase wipe frequency, because your stencil "fid" will get dirty.

good luck, pr

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GEB

#35088

Stencil fiducials | 22 June, 2005

Thanks for your help. I have resorted to using pads as the PCB doesn't have fids particularly close to the stencils fids. All previous jobs have had fids in the same place on the stencil as the PCB. The printer has a wiper paper which I have set to every 3 prints... see how it goes.

It is harder to find the same pad on the stencil as the PCB as they don't have circuit refs next to them!!, so thanks for the sarcastic comments "??"

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#35089

Stencil fiducials | 22 June, 2005

Hello Geb The first thing that I would do is to get a operators manual. Call Us they are not expensive, your time probly is. 740-344-4260 harry

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??

#35090

Stencil fiducials | 22 June, 2005

Anytime......hahhahahahahaha..

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GEB

#35091

Stencil fiducials | 22 June, 2005

?? I think you're just showing yourself up now......

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Rob

#35092

Stencil fiducials | 22 June, 2005

Hi Grant,

I think I've got one somewhere - I'll have a look later in the week and post it out to you.

Cheers,

Rob.

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GEB

#35095

Stencil fiducials | 22 June, 2005

Cheers Rob, that'd be great.

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