AutoCAD is a powerful drawing software, and the drawn graphics are widely used in many fields. At this time, we need to output graphics in different ways according to different uses. Below I will introduce to you several techniques of AutoCAD output.
1. Export AutoCAD graphics as image files
AutoCAD can output the drawn graphics as a universal image file. The method is very simple. Choose the "Export" command in the "File" menu, or directly enter the "export" command in the command area, and the system will pop up the "Export" dialog box. Select the "* .bmp" format in the "Save Type" drop-down list, click "Save", use the mouse to select or select the graphics to be output in sequence, and then press Enter, the selected graphics will be output as a bmp format image file. Although this output method is simple, it must pay attention to certain skills in operation.
1. Ensure the clarity of the output image
When AutoCAD outputs images, it usually takes the screen display as the standard. The size of the output image is equal to the size of the AutoCAD graphics window. The graphics in the graphics window are output according to the screen display size, and the output result is independent of the actual size of the graphics. In addition, the undisplayed part of the screen cannot be output. Therefore, in order to display the output image clearly, the part to be output should be displayed on the screen with the largest possible proportion.
We know that when the graphics display ratio in AutoCAD is large, the circle and arc appear to be composed of several straight line segments. This does not affect the printing result, but when the image is output, the output result will be exactly the same as the screen display. Therefore, if you find When a circle or arc is displayed as a polyline segment, you should use the viewres command before outputting the image to make the circle and arc look as smooth and realistic as possible.
The resolution of the image file output in AutoCAD is the screen resolution. If the file is used in other programs for screen display only, this resolution is already appropriate. If you want to print it out eventually, you must increase the resolution of the image in image processing software (such as PhotoShop), generally set to 300dpi.
2. Control the background of the output image
The color of the output image is usually exactly the same as the screen display, that is, the white text effect on the black background in the AutoCAD operation interface, which may be different from the actual effect we need. At this time, we can use the "Options" command under the "Tools" menu, in the pop-up "Options" dialog box, select the "Display" tab, click the "Color" button, in the pop-up "Color Options" window, Click directly on the white or other colors in "Color" and press Enter twice, the background color of the window will change. The color of the output image is exactly the same as the actual drawing color.
Second, output AutoCAD graphics as non-1: 1 graphics
When we finish drawing the graphics in AutoCAD 2000, we need to output the graphics to a plotter or printer, and most of the drawing ratios are not 1: 1. Different industries use different drawing ratios. For example, the ratios commonly used in mechanical engineering are 1: 1, 1: 2, 1: 5, 1:10, etc .; the ratios commonly used in construction engineering are larger, from 1:10 to 1: 100. , Even bigger.
In AutoCAD, we can draw graphics without knowing the drawing size before drawing, but it is best to know the output size of the drawing before drawing the drawing, so that you can determine the drawing scale, size ratio, text size, fill pattern ratio, and line style proportion. However, AutoCAD is easy to use and flexible. Before and after drawing, we can change all the settings.
In AutoCAD, there is a distinction between model space and paper space. In different spaces, the method of outputting non-1: 1 graphics is also different. Below we explain the method of outputting non-1: 1 graphics in different spaces.
1. Output non-1: 1 graphics in model space
After designing and drawing the graphics in the model space, calculate the drawing scale according to the paper size of the required drawing, and use the Scale command to scale the drawn shape overall according to the drawing scale. Select the "Print" command in the "File" menu, AutoCAD opens the "Print" dialog box, in the "Print Settings" tab, set the paper size, printing range, drawing direction, in the "Print Scale" option group, set the scale Set to 1: 1, press the "OK" button to output graphics. The disadvantage of this method is that when the graphics are zoomed, the dimension values ​​marked will also change accordingly. It is also inconvenient to adjust the linear proportion in the dimension style before drawing.
After designing and drawing the graphics in the model space, the drawing scale is calculated according to the required drawing size of the drawing. Select the "Print" command in the "File" menu, AutoCAD opens the "Print" dialog box, in the "Print Settings" tab, set the paper size, printing range, drawing direction, in the "Print Scale" option group, select " "Custom" option, set the ratio to the calculated drawing ratio (such as 1:10 or 2: 1, etc.); or select the "Zoom by paper space" option, the drawing ratio will be automatically set to the best ratio to adapt The selected drawing size, and finally press the "OK" button to output the graphics. The advantage of this method is to use the actual size, which is convenient for future modification and management. When printing graphics, you can specify the exact proportion.
2. Output non-1: 1 graphics in the paper space
Although we can directly select the "print" command in the model space to print the graphics, in many cases, we may want to process the graphics before outputting them. For example, to output multiple views of graphics in one drawing, add title blocks, etc., the so-called paper space will be used at this time. The paper space is a tool that completely simulates the paper page and is used to arrange the output layout of the graphics before or after drawing.
After designing and drawing the graphics in model space, create a layout and set the pages in the layout. In the "Printing Device" tab, select the printing device and print style sheet. In the "Layout Settings" tab, set the paper size , Print range, drawing direction, in the "print ratio" option group, set the ratio to 1: 1.
Create a floating viewport in the paper space, use the object characteristics to set the standard ratio of the viewport (such as 1:10 or 2: 1, etc.), each viewport has its own independent standard ratio of the viewport, so that we can Many viewports are generated on different sheets of paper with different scale factors so that the same geometry can be used without having to copy or scale the geometry.
After making all the settings, select the "Print" command to print out the graphics at a 1: 1 ratio.
3. Export AutoCAD graphics to web pages
Due to the increasing use of the Internet, the use of the Internet for design and communication has become a development trend. However, if you just want to show someone your own design, and the other party does not have AutoCAD installed, or does not use AutoCAD, then you need to use the DWF file format.
AutoCAD's ePlot graphic output function can generate DWF format files, which are "electronic graphic files" and can be published on the Internet. DWF is saved in Web graphics format, and can be opened, viewed, and printed using browsers and plug-ins such as Autodesk WHIP! 4.0. And supports real-time pan and zoom, layer, named view and embedded hyperlink display. However, DWF cannot be directly converted into a DWG that can be used, nor does it have the function of modifying lines, thus ensuring the safety of design data to some extent.
DWF is a compressed vector data format, which is faster to open and transmit than DWG. Check out DWF's WHIP! The software interface is simple and easy to use, and you can easily view the drawings in DWF without knowing the AutoCAD technology.
To export graphics to DWF format, first open the exported graphics file, select the "Print" command in the "File" menu, AutoCAD opens the "Print" dialog box, select "Print Configuration" in the "Printing Device" tab Set the "DWF ePlot.pc3" method. If necessary, you can also press the "Characteristics" button to set the relevant parameters of DWF in detail. Enter the file name and file location description in the "Print to File" column. The file location can be a local folder, a location on a local area network, or a URL on the Internet. On the "Print Settings" tab, set the general options for drawing output. As a means of publishing design results, DWF does not need to rigidly set the output ratio. After determining the size of the paper, setting the print ratio to "scaling by paper space" can meet the general requirements. After the preview is confirmed, you can output it.
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