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khan

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Reply with quote  #1 
Hello,

I have a few questions on the DWG to GBR conversion for photomask design.

I used Autocad to generate the following design (DWG format):
https://drive.google.com/open?id=0B1T-OmveuU0ySkNuS0lIcnNiSE0

But when I converted the DWG file to GBR file using ACE 3000 I got the following image (inverted color):
https://drive.google.com/open?id=0B1T-OmveuU0yOTl4QlR4ZXJCcDA

Q1. Is there any way to keep the original colors from the DWG file?


In addition to that, I wanted to introduce transparency on squares (https://drive.google.com/open?id=0B1T-OmveuU0yOXg0N3ZnbHpiNE0) but the conversion didn't process it (https://drive.google.com/open?id=0B1T-OmveuU0yV1FQRHZLblRkYTA).

Q2. Is there any way to show transparency on the DWG file?


Lastly, I was wondering how to assign the area for printing. For example, I wanted to print out the area outlined by the bold red line in the linked image (https://drive.google.com/open?id=0B1T-OmveuU0ybzlJc250dk12MG8).

Q3. Is there any way to select a desired area for printing?


Thank you very much for your help.
Best regards



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Koohee Han
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Numerical Support Team
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Posts: 1,558
Reply with quote  #2 
Q1.  The colors are determined by how the DWG is constructed.  Here's our 2 guidelines for DWG to Gerber Conversions:
http://www.numericalinnovations.com/blogs/news/6116174-dxf-dwg-to-gerber-conversion-guidelines
http://www.numericalinnovations.com/blogs/news/7099866-dxf-conversion-secrets-for-gerber-gds-ii-odb-etc


Q2.  You may want to review "polygon de-embedding" feature.  This allows ACE to assign what is Dark/Clear.  Here's several forum topics:
http://forums.numericalinnovations.com/post/what-are-layer-composites-can-i-change-each-objects-composite-level-3383818?highlight=composite+level&pid=32714104
http://forums.numericalinnovations.com/post/during-dxf-conversion-we-need-to-fill-the-circles-to-make-solid-i-tried-to-7184863?highlight=deembed&pid=1285203725
http://forums.numericalinnovations.com/post/conversion-of-a-complex-dense-dwg-to-gerber-format-7218761?highlight=deembed&pid=1285521858


Q3.  To assign a specific area for printing, I would recommend you add crop-marks to the 4 corners of your DWG that you wish to export as an image.  Here's a design that uses circle crop marks to define the extents.  We recommend using squares as crop marks.

http://forums.numericalinnovations.com/post/dxf-to-high-resolution-bitmap-4000-per-millimeter-density-the-final-cropped-bitmap-height-is-8053415?highlight=crop&pid=1291737858




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