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作者:  信息来源:无忧机械电子  2006-10-17

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This page deals with: Import DXF/DWG options: Standards, Unit of the file, Paper Spaces in Background, Keep Model Space, Create end points, Convert dimensions as, Export DXF/DWG options: Exported sheets, Version, Export mode。 DXF:DXF Standards replace the mapping options of the previous releases。 ...
  This page deals with: Import DXF/DWG options: Standards, Unit of the file, Paper Spaces in Background, Keep Model Space, Create end points, Convert dimensions as, Export DXF/DWG options: Exported sheets, Version, Export mode.

 

 

Import

 

Standards

Drafting:

The element you import will be placed in a Drawing, the root document of Drafting.
This Drawing uses styles defined in a pre-defined or a customized standard such as ISO, JIS, ANSI, ASME.
For more details about Drafting standards, please refer to Administration Tasks in the Interactive
Drafting User's Guide
.

Drafting Standards replace the process of the previous releases where you had to open, (eventually modify)
and close a new Drawing to recover the standard you wanted to use for the data you were going to import.
The standard selected in the settings is taken into account at once.

DXF:

DXF Standards replace the mapping options of the previous releases.
Those options applied only to the current session whereas a given standard applies to all the sessions
using that standard.
For more information, please refer to the Infrastructure User's Guide Customizing Standards.

Some CAD/" target="_blank">AutoCAD elements do not exist in V5 and require a mapping:

AutoCAD color is mapped to V5 line thickness, AutoCAD line type is mapped to V5 line type, AutoCAD text font is mapped to V5 text font.

These mappings are defined in a DXF standard file. For more details about DXF standards,
please refer to DXF/DWG: Administration Tasks in this User's Guide.

select the requested standards from the drop-down lists.
 

  The content of this list depends on which standards have been created and/or customized by your administrator.    

Unit of the File

 

  By default, the option is set to Automatic and the unit of import is determined automatically
(either millimeter or inch) for the best possible resulting drawing.

However, in some cases the resulting drawing is not satisfactory and requires another unit.
select this unit in the list. Then restart the import.

If you have selected Scale Factor, enter the value of the scale factor between the imported
file and what you want to get from the original Drawing in the fields on the right. 

  By default, the option is set to Automatic    

Paper Spaces and Model Space

The Interactive Drafting workbench provides a simple method to manipulate a sheet. A sheet contains: 

a main view: a view which supports the geometry directly created in the sheet  a background view: a view dedicated to frames and title blocks  interactive or generated views.

An AutoCAD file is usually made of:

a model space that contains the geometry, a paper space (or several in AutoCAD 2000). 
AutoCAD recommends that the paper space contains the title box and one or several viewports 
(A viewport is a window to the model space). However other configurations are possible.

select this option to put the Paper Spaces in the Background view.
The viewports will be created in the working view.
By default, this option is not selected.

select this option to keep the entire Model Space in its own sheet.
By default, this option is not selected.

 

  By default, these options are not selected.    

Create end points

It is not easy to modify and stretch geometry of imported elements the way you can do it in a V5 native elements.
A solution is to create end points when needed, but to the detriment of performances.
Create end points offers
you three options to fit your needs:

Never: it is the default option. It ensures the best performances. For few entities: creates end points only for hatch boundaries and mixed polylines.
This is an intermediate choice between performances and edition capabilities. Always: creates end points for arcs, ellipses, lines, mlines, leaders and not standard polylines and splines.
Use this option only when edition capabilities are required.

Information on the option selected is given in the report file:

  By default, the option is set to Never.  

Convert dimensions as

select the required option:

Dimensions

This option preserves the semantic of AutoCAD dimensions in V5 as best as possible. 

In most cases, the whole semantic of the dimension is kept. 
This means the position, the layout and the text are preserved. 
The position, color, thickness, text caption (symbol, value, tolerance, font, color) can be edited.  In some cases, text with redundant information 
(e.g. tolerance present both in the dimension field and in the dimension text) or dual dimension, 
or other unrecognized information will be dealt as a text with an associative link with the dimension.
This dimension has a "fake value" that is blanked.
To display the true dimension value, delete the associated text and enter the data in the properties
of the dimension.
Limitation for the Dimensions option: Angular dimensions, problems may occur while positioning texts, Following attributes are not yet supported :
suppression of one of the dimension lines (for half dimensioning), offset extension or suppression of extension lines, arrowhead choice (the V5 default arrowhead is used), automatic suppression of arrowheads if space is not sufficient.
Geometry

select this option to keep the graphical aspect. Geometry is exploded into multiple lines, arcs, texts.
(this mode increases performance when loading a model).
This is the option by default

Details: dimensions are turned into details. 
This is an halfway notion between the previous two, in which the geometry is preserved and
the dimension is easy to handle (it can be all selected at once).

See also the FAQ

  By default, the option is set to Geometry.    

Export

 

Exported Sheets

select the required option to export either all sheets or only the current sheet of a multi-sheet drawing.

The option Only current exports the data to a file with the name entered in the Save as dialog box. 

The option All exports the data to several files. 
The name of each file is made of the name entered in the Save as dialog box and the name of the sheet
(Drawing1_sheet_1.DXF, Drawing_sheet_2.DXF, ...). 

  By default, the option is set to All.  

Version

select the required export file format from the combo box.

 

Version 5 supports DXF/DWG formats version 12, 13, 14 and Autocad2000.

Autocad2000i and Autocad2002 formats are the same as Autocad 2000.

  By default, the option is set to DXF/DWG R14.    

Export mode

This option offers the choice between three export modes:

Graphic:
This was the only available mode up to Release 9.
It is quick and reliable. It is useful if you want to export a CATDrawing to AutoCAD and print it without modifying it.

Structured:
This mode was introduced in Release 10.
The exported file can be modified. For example, in the case of a dimension exported in Structured mode,
all the graphic entities representing the dimension are exported to an Insert/Block. 
The more complex Drafting elements are exported the same way whereas the basic geometric elements
(lines, arcs, etc)  are exported as isolated elements. 

Semantic:
This mode was introduced in Release 11 and is similar to the Structured mode, with the advantage that linear,
angular and circular dimensions are exported as true dimensions (with a default dimension style).
"Default dimension style" entails that most graphic attributes
(such as color, display format of the dimension value, type of arrow, space...) of the dimensions are lost. 

For more information, see the What About the Elements You Export? section in the
Exporting a CATDrawing Document Data into a DXF or DWG File
chapter of the Data Exchange Interfaces User's Guide.

  By default, the option is set to Graphic.  
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