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'[OT]: Extracting Gerbers from WinBoard'
2001\11\26@085725 by Peter Foster

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Having just spent two weeks on an MP3 project, I have discovered that my
PCBs have been manufacturer back-to-front (mirror image). When extracting
gerbers from Winboard is there something I should look out for? How can I
check it is okay prior to manufacture?

Thanks

Peter

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2001\11\26@094201 by John Walshe

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What we always do is load the gerber into a gerber viewer (eg GCPREVUE) or
an PCB cad tool like CAM350( which we use to make up panels etc). This way
you will see what the board manufacturer gets rather that wondering what the
cad package created.
John

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2001\11\26@104857 by David VanHorn

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At 08:55 PM 11/26/01 +0700, Peter Foster wrote:
>Having just spent two weeks on an MP3 project, I have discovered that my
>PCBs have been manufacturer back-to-front (mirror image). When extracting
>gerbers from Winboard is there something I should look out for? How can I
>check it is okay prior to manufacture?

Put layer markers on each layer.
Box, containing "1", "2" etc in top-down order.
I also label my gerbers as compsilk, compcop, soldcop, soldsilk etc
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2001\11\26@110539 by Bob Barr

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On Mon, 26 Nov 2001 20:55:27 +0700, you wrote:

>Having just spent two weeks on an MP3 project, I have discovered that my
>PCBs have been manufacturer back-to-front (mirror image). When extracting
>gerbers from Winboard is there something I should look out for? How can I
>check it is okay prior to manufacture?
>

You can check your Gerber files with a Gerber viewer. GC-Prevue is a
free download at www.graphicode.com/index.cfm?section=download
(I believe that you have to register to download it but the program is
free.)

You may also want to consider placing some text (perhaps the words
'Component' and 'Solder') right in the copper pattern on each side of
a two-sided board. (I don't know for certain that Winboard allows free
text on a copper layer but I'd be surprised if it didn't. Most CAD
programs do.)

If the solder side Gerber doesn't get mirrored properly, the text
'Solder' will appear reversed when you (or your fab house) views it
from the solder side of the board.

Regards, Bob

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2001\11\26@122255 by chris

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I use Ivex WinBoard and I generate my Gerbers with Ivex View. I have always
checked the "Mirror X" check box in the 'Plot' dialog box to be sure one
side is flipped to match the other. I always have to view the files with the
viewer before sending to the fab house- WinBoard is pretty good for the $,
but it doesn't often do a perfect job. The suggestion to place markers on
the board (WinBoard calls them "Targets" - place them once, and they will be
imaged on both sides)is a must also.
I would also look into a new board house. Advanced circuits http://www.4pcb.com
would have caught this type of error, and notified you before proceeding.

> {Original Message removed}

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