Graphical output skills in AutoCAD
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AutoCAD is a powerful drawing software, and the graphics drawn are widely used in many fields. At this point we need to output the graphics in different ways depending on the application. Below I will introduce you to several AutoCAD output techniques.
First, export AutoCAD graphics as image files
AutoCAD can output the drawn graphics as a common image file. The method is very simple. Select the "Output" command in the "File" menu, or directly enter the "export" command in the command area, and the system will pop up the "Output" dialog box. In the "Save as type" drop-down list, select the "*.bmp" format, click "Save", use the mouse to select or select the graphics to be output and press Enter. The selected graphics are output as images in bmp format. file. Although this output method is simple, it must pay attention to certain skills when operating.
1, to ensure the clarity of the output image
When AutoCAD outputs images, it is usually based on the screen display. The frame of the output image is equal to the size of the AutoCAD graphics window, and 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 graphic. In addition, parts that are not displayed on the screen cannot be output. Therefore, in order to make the output image clear, the portion to be output should be displayed on the screen as large as possible.
We know that when the scale of the graphic display in AutoCAD is large, the circle and the arc seem to be composed of several straight line segments. Although this does not affect the printing result, when the image is output, the output result will be exactly the same as the screen display, so if it is found When a circle or arc is displayed as a line segment, use the viewres command before outputting the image to make the circle and arc look as smooth and realistic as possible.
An image file output in AutoCAD with a resolution of the screen resolution. If the file is used for other programs only for on-screen display, this resolution is already appropriate. If you want to print out, you should 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 black-and-white effect in the AutoCAD operator interface, which may be different from the actual effect we need. At this point, we can use the "Options" command under the "Tools" menu, in the "Options" dialog box that pops up, select the "Display" tab, click the "Color" button, in the "Color Options" window that pops up, Just click on the white or other color in "Color" and press Enter twice. The background color of the window changes. The color of the output image is exactly the same as the actual drawing color.
Second, the AutoCAD graphics output as non-1:1 graphics
When we draw the graphics in AutoCAD 2000, we need to output the graphics to the plotter or printer, and most of the drawings are not 1:1. Different industries use different drawing ratios such as 1:1, 1:2, 1:5, 1:10, etc., which are commonly used in mechanical engineering; the proportions often used in construction projects are larger, ranging from 1:10 to 1:100. Even bigger.
In AutoCAD, we don't have to know the size of the drawing or the drawing before drawing, but it is better to know the output size of the drawing before drawing the drawing, so that we can determine the drawing scale, size ratio, text size, fill pattern scale and line type. proportion. However, AutoCAD is easy to use and flexible. We can change all settings before and after drawing.
In AutoCAD, there are model space and paper space. In different spaces, the method of outputting non-1:1 graphics is different. Below we explain the method of outputting non-1:1 graphics in different spaces.
1, output non-1:1 graphics in the model space
After designing the drawing in the model space, calculate the drawing scale according to the drawing size of the desired drawing, and use the Scale scaling command to scale the drawing shape as a whole. In the "File" menu, select the "Print" command, AutoCAD opens the "Print" dialog box, in the "Print Settings" tab, set the paper size, print range, drawing direction, in the "Print Scale" option group, the proportion Set to 1:1 and press the "OK" button to output the graph. The disadvantage of this method is that when the graphic is scaled, the dimension value of the label will also change accordingly. It is also inconvenient to adjust the linear scale in the dimension style before the drawing.
After drawing the drawing in the model space, calculate the drawing scale according to the drawing size of the required drawing. In the "File" menu, select the "Print" command, AutoCAD opens the "Print" dialog box, in the "Print Settings" tab, set the paper size, print range, drawing direction, in the "Print Scale" option group, select " Customize the option to set the scale to a calculated drawing scale (such as 1:10 or 2:1, etc.); or select the "Zoom by paper space" option, the drawing scale will be automatically set to the optimal scale to adaptive The selected paper size, and finally press the "OK" button to output the graphic. The advantage of this method is that it uses the actual size, which is convenient for future modification and management. When printing graphics, you can specify the exact scale.
2, output non-1:1 graphics in the paper space
Although we can print the graphic directly in the model space by selecting the "print" command, in many cases, we may wish to properly process the graphic before outputting it. For example, to output multiple views of a graphic in a drawing, add a title block, etc., the so-called paper space is used. Paper space is a tool that completely simulates a drawing page for arranging the output layout of a graphic before or after drawing.
After designing the drawing in the model space, create the layout and make the page settings in the layout, in the "Printing Devices" 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 Scale" option group, set the scale to 1:1.
Create a floating viewport in the paper space, use the object property to set the standard scale of the viewport (such as 1:10 or 2:1, etc.), each viewport has its own independent viewport standard scale, so that we can A number of viewports are generated on a sheet with different scale factors, so you don't have to copy the scale or scale it to use the same geometry.
After making all the settings, select the "Print" command to print the output graphic in a 1:1 ratio.
Third, 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 trend of development. However, if you only want to give others a look at your own design, and the other party does not have AutoCAD installed, or will not use AutoCAD, then you need to use the DWF file format.
AutoCAD's ePlot graphics output function generates DWF format files, which are "electronic graphics files" that can be published on the Internet. DWF is saved in a web graphics format that can be opened, viewed, and printed using a browser and plugins such as Autodesk WHIP! 4.0. It also supports real-time panning and zooming, layers, named views, and display of embedded hyperlinks. However, DWF cannot be directly converted into a usable DWG, and there is no function of modifying the line, which ensures the security of the design data to some extent.
DWF is a compressed vector data format that is faster to open and transfer than DWG. Viewing DWF's WHIP! software interface is easy to use, and you can easily view the patterns in DWF without using AutoCAD.
To export the graphic to DWF format, first open the exported graphic file, select the "Print" command in the "File" menu, AutoCAD opens the "Print" dialog box, and select it in the "Print Configuration" column of the "Printing Device" tab. Set the "DWF ePlot.pc3" mode. If necessary, you can also press the "Properties" button to carefully set the relevant parameters of the DWF. Enter a file name and file location description in the Print to File section. The file location can be a local folder, a location on a local area network, or a URL on the Internet. In the "Print Settings" tab, set the general option parameters for the plot output. As a means of releasing the design result, DWF does not need to set the output ratio rigidly. After the paper size is determined, the printing scale is set to "scale by paper space" to meet the general requirements. After the preview is confirmed, it can be output.