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There are some suspicions about the reasons why the PDFs get rather big.
Do the drawings have many arcs? It has been a known issue for quite a long time that arcs (except full circles and full ellipses) are converted into polygons, which makes the PDF rather big, as the polygons may contain (50 to 100) lines. This is actually THE test to find out how good the conversion from CAD to PDF actually is.
Then, you mention fills, which might be not properly converted (normal lines instead of patterns).
These problems occur when the PDF creation goes via plot output to PostScript and then to Distiller. With Acrobat 6, you have now a new feature to create PDFs from Autocad drawings, however. There is a PDFMaker for Autocad, which should abbreviate the creation process and also bring more features through from the drawing. You might check with the compatibility list, if the PDFMaker for Autocad actually supports their version. If it does, make sure that it got installed. I don't know if this PDFMaker helps with the polygon issue and the pattern issue.
Hope, this can help.
Max Wyss PRODOK Engineering Low Paper workflows, Smart documents, PDF forms CH-8906 Bonstetten, Switzerland
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They are currently using AutoCad 2000-I and have recently upgraded to Acrobat Pro 6.0 to create PDF's from AutoCad. They would like to create an efficient process for converting all hard copy architectural drawings and AutoCad files to PDF files available on a web page. On first try they are experiencing these problems and questions:
The PDF file created from AutoCad in Acrobat 6.0 using the Standard plot setting is about 3.4 MB. The original AutoCad file was about 1.05 MB and the three linked photos were about 1.2 MB. Why is the PDF file larger than the original file? Why is the PDF so big no matter what plot setting is selected?
Is there something unusual about solids or solid hatch patterns? One Autocad file keeps locking up and crashing Acrobat at a section with a solid hatch pattern.
Do they need to upgrade AutoCad 2000-I to be compatible with Acrobat 6.0?
Is there a resource for AutoCad users to look at for recommendations/descriptions of PDF plot settings?
Coming from a printing perspective, I'm having trouble answering their questions.
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