Electronics Forum | Fri Jun 10 14:41:45 EDT 2005 | jdengler
I agree with PR. We run down to 12 mil pitch with out local fids. We run with 2 global fids for a panel of up to 40 boards. This has worked very well for us. Jerry
Electronics Forum | Thu Jun 23 14:34:17 EDT 2005 | pr
Is it only this 1 job? Is the error "board model not found"? I have had instances where I taught the Fids. and it still didn't like them in production. Is the board fid. in the center of the screen when you try to run the job?
Electronics Forum | Fri Sep 23 08:35:05 EDT 2005 | jdengler
I agree with the local fids concept. This is usually a problem since the flex will most likely not have fids. However if your components are 50-mil pitch and 1206 or larger, you could use tooling holes to align the flex circuits when they are attach
Electronics Forum | Thu Oct 19 14:21:34 EDT 2006 | sliebl
Also, with our CS machines, I don't need to know the exact location of the fids, I just teach them to the machine. What the software does with the data is bisect the line the centerline between the fids to find the centerpoint of the part.
Electronics Forum | Thu Oct 19 14:32:53 EDT 2006 | curious
The fid is just a "known reference" location, the only advantage/difference is proximity to the part. It almost sounds like you are using the local fid as your part placement coordinates? So maybe the CS machine IS different but something doesn't sou
Electronics Forum | Thu Oct 19 14:49:35 EDT 2006 | sliebl
We teach all of the fids. Globals and Locals. This is because we use a magnetic table, not a pass through conveyor. Without showing the machine the global fids, it has no idea where we've mounted the board.
Electronics Forum | Thu Oct 19 15:15:24 EDT 2006 | russ
to use local fids such as this you must use the cad data, when the machine knows where it is supposed to be and seeks there it reads where it (PCB) really is and then corrects the machine, it does not have to be symetrical at all. If you teach fids
Electronics Forum | Mon Dec 03 15:27:51 EST 2007 | aj
Hi, I have often used Plated drill holes for reference with good success. You should advise your customer to put 4 fiducials on the board which covers both diagonals this way you have the option to change fids ( or even get them to put extra fids a
Electronics Forum | Tue Mar 25 14:27:16 EDT 2008 | smtnet51
Make sure whatever you are using for a fid. is apart from any other pads or apertures. It'll grab a pad/aperture above or below (in auto mode) and screw up your print. We saw this alot when using pads for fids on DEKs.
Electronics Forum | Fri Aug 22 15:26:18 EDT 2008 | rway
I rarely use blk fiducials. But when I do, they are always programmed after the fids. It's the fids that sets your general alignment of the panel. I only use blk fidus for thin pcbs (30 mil) that tend to warp when on the conveyor.
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