How to set the ratio in the AutoCAD

When drawing on a drawing, you should first determine the scale before starting. This ratio is the ratio of the size of the drawn object to the actual size of the object represented by the graphic. For example, every quarter of an inch in a building graphic may represent one foot of a room floor plan. The selected scale must have the object's graphic full of drawings. In AutoCAD, this process will be reversed. You can draw with the specified unit type (building unit system, decimal, etc.) or the default unit type (decimal). Each unit on the screen can represent the desired unit system: inches, millimeters, kilometers. Therefore, if the engine parts are drawn, one unit may be equivalent to one millimeter. If you draw a map, one unit may be equivalent to one kilometer.

That is to say, when you start drawing, you don't need to consider the drawing scale, you can draw according to 1:1, which is a remarkable feature of CAD drawing. When you print out the plot, consider the scale of the plot. When printing, you can set different scales for different parts of the graph.

Although you don't need to specify the scale of the graphic before printing, you can enter the zoom size of the next few items in advance:

1. Text (if drawn in model space)

2 , label (if drawn in model space)

3, discontinuous line type

4, fill pattern

5, view (only in the layout viewport)

Scale these elements to ensure that they are the correct size in the final drawing. Of course, multiple text formatting, dimensioning styles, and fill patterns are used in the drawing, and the scale factor can be flexibly adjusted.

Specifying scale factors in model space

If you plan to print graphics from the Models tab, you should calculate the exact scale factor by converting the scale of the graph to scale 1:n. This ratio treats the print unit as a graphical unit representing the actual size of the object being drawn.

For example, if the drawing scale is 1/4 inch = 1 foot, you can calculate the scale factor 48 as follows:

1/4" = 12"

1 = 12 x 4

1 (print unit) = 48 (graphic unit)

With the same calculation method, the scale factor of 1/8 inch = 1 foot is 96, 1 ​​inch = 20 The scale factor for feet is 240.

If you are using a metric system, such as a paper size of 210 x 297 mm (A4 paper), the scale factor is 20. Calculate the graphic limits as follows:

210 x 20 = 4200 mm

297 x 20 = 5900 mm

After setting the scale factor, you can use it to set the text height and label Size, line scale, fill pattern scale, and viewport scale. Once the graph is complete, you can print at any scale or print different views of the model at different scales.

Apply Scale Factor

Set the values ​​of the following elements to determine if you want to print from a model space or paper space layout.

Text, set the text height when creating text or set a fixed text height in text style (STYLE). The text print height of the model space should be increased by the scale factor. Text created directly on the layout should be set to the true size (1:1).

Label, set the scale in the dimension style (DIMSTYLE) or with the DIMSCALE system variable. Labels created directly on the layout should be set to true size (1:1).

Line Style, For objects printed from the Model tab, the CELTSCALE and LTSCALE system variables should be used to set the scale of the discontinuous line style. For objects printed from layout (paper space), the PSLTSCALE system variable should be used.

Fill the pattern, in the "Boundary Fill" dialog (BHATCH) or use the HPSCALE system variable to set the scale of the fill pattern.

View, when printing from the Layout tab, you need to use the ZOOM XP command, where XP is the ratio of the view to the paper size (the reciprocal of the scale factor).