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Set DXF/DWG export options

 

Before saving the vector image as a DXF/DWG file you need to ensure that the DXF/DWG export options are set correctly.

To set the DXF/DWG export options, go to File Menu > Vector > DXF/DWG Export Options.

 

CAD Color 0->Color 7

Bezier curve export options

Include line widths

Layers by color or by type

Attach raster image

Font

Default DXF/DWG file version

 

CAD Color 0->Color 7

In Scan2CAD, Color 0 is always black regardless of the palette you are using.

If CAD Color0->Color7 is selected, Scan2CAD will convert all vectors that are Color 0 (black) to Color 7 when you save the vectors.

Because some CAD programs cannot read black vectors, CAD Color0->Color7 is selected by default.

 

Bezier curve export options

Bezier curves are exported from Scan2CAD as splines.

If your CAD program does not support splines you can choose to export Bezier curves as arcs or as polylines.

We recommend that if your CAD program does not support splines, you should select the Bezier -> Arcs option. When you select this, Scan2CAD breaks any Bezier curves into smoothly flowing arcs when you save the vectors to DXF.

If you select Bezier -> Polylines, each Bezier curve will be broken into a user-defined number of straight line segments when you save the vectors to DXF. Type the number of segments you want into the Segments box. The diagram below shows the effect of breaking a curve into 4, 8, 16 and 32 segments.

Bezier curve exported to polyline:

Original Bezier, 4 segments, 8 segments, 16 segments and 32 segments.

The default value of 16 segments will be optimal in most cases. Entering more segments will usually increase the size of the DXF file without improving the shape of the curve.

 

Include line widths

If you select Include Line Widths, any vector line width data will be included in the DXF file.

Some CAD and CNC programs are unable to handle vector line widths. To exclude line width data from the DXF file, deselect Include Line Widths.

 

Layers by color or by type

If you select Vectors -> Color Layers Scan2CAD creates a DXF file with a layer for each color in the palette. The layer that each vector is saved to depends on its color. If the vectors you are saving originated from a PDF file, the colors will be mapped to the nearest color in the AutoCAD palette.

If you select Vectors -> Type Layers Scan2CAD creates a DXF file with a layer for each vector type – continuous lines, dash lines, dash dot lines, arrow lines, hatch lines, polylines / polygons / filled circles / filled polygons, arcs, splines, circles and text. The layer that each vector is saved to depends on its type.

If you select Vectors -> True Color Scan2CAD creates a DXF file with all the vectors on one layer. Each vector is saved as its own true color.

If you select Vectors -> True Color and CAD Color0->Color7 is selected, black vectors will be saved as white.

 

Attach raster image

If you select this option, a reference to the raster image is included in the DXF file. This means that if you open the DXF file in a CAD program that can accept attached raster images, both the DXF file and the raster image will be opened in the CAD program, correctly overlaid.

Note that the raster image is not actually contained in the DXF file. The DXF file only contains a reference to the raster image. This means that if you move, delete or rename the raster image it will no longer be attached to the DXF file.

When you load a DXF file with an attached raster image into your CAD program, the CAD program will display the raster image in the color that corresponds to the number you type into the CAD Color Index box. This color will be different depending on the CAD program you use. If you are using AutoCAD or AutoCAD LT you might like to try the following colors:

2 will display the raster image in yellow.
8 will display the raster image in dark gray.
9 will display the raster image in light gray.

 

Font

If you select Default (Standard), text will appear in your CAD program in your CAD program’s default font.

If you select User Set (Arial etc), text will appear in your CAD program as Arial or as any other font you have selected when writing or editing vector text.

 

Default DXF/DWG file version

Scan2CAD can save two versions of DXF, pre R14 and R14 and later.

If you select DXF pre R14 Scan2CAD defaults to saving a very simple DXF file that has no known compatibility problems with any CAD or CNC program.

If you select DXF R14 and later Scan2CAD defaults to saving a DXF file that can be read into programs that support AutoCAD R14/LT97 and later DXF files.

Scan2CAD can save a range of versions of  DWG from R2000 through to R2014.

See Save the vector image.

 

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