Summary Of 6 Techniques For CAD Drawing Import

Usually, if we can obtain electronic CAD drawings when dealing with projects, it will save us a lot of drawing processes, which improves efficiency and accuracy. However, due to the nonstandard drawings and other reasons, we did not import CAD drawings into the software smoothly every time. When the electronic drawings cannot be imported or are incomplete, we can try hard to try some methods and tips to successfully import them. Today, we will analyze several problems encountered in the drawing and their solutions.

The CAD Drawing Is Displayed Small After Being Imported

After the CAD drawing is imported into the software, it will be displayed very small, even if it is placed at the maximum size. But it can be displayed normally when opened with CAD software. This is because there are other elements in the CAD drawing. This element may be just a small point or a short segment, which is far from the drawing we want to import. It can only be seen when you view it in full screen in CAD.


Open the file with CAD software, double click the scroll wheel in the middle of the mouse to display the full screen. When you look carefully, you will find that in addition to the drawing we want to import, there is a small point in the interface, which can be deleted by dragging the box.

Misalignment Between Components And Grid

The grid has been identified and started to import the next drawing, the column diagram. However, after importing, it was found that the column positions were all in a string, which did not coincide with the identified grid positions. The coordinate origin of the identified grid is not the same as that of the imported drawing, so the imported column positions are in a string.


After the grid has been identified, the CAD drawings imported later should be repositioned to ensure the accuracy of the component import position. Click, and then snap a point just imported into the CAD drawing, usually the intersection point at the bottom left of the drawing, and then make this point coincide with the point at the same position of the imported grid.

Components That Display Normally Cannot Be Imported Sometimes

After the CAD drawing is imported into the software, it can be displayed normally, but the components cannot be imported. Some CAD files use “external references”, that is, reference blocks on other CAD files. If such files are identified, they may fail. Although walls, beams, slabs, columns and axes can be seen, they do not belong to the CAD file itself, so nothing can be obtained when reading line data.


Use the “External Reference Manager” under the AutoCAD “Insert” menu to find out which CAD file blocks it references. The referenced CAD file is the real file that can be read. After finding it, select Bind and save it to recognize it.

CAD drawing

The Identified Column Size Is Inconsistent With The Mark In The CAD Drawing

The size of the identified column is different from the mark on the CAD drawing. At present, it is found that the problem may be caused by two reasons, and the specific treatment method can be determined only by analyzing the drawings.

Problem reason 1:

It may be caused by the proportion of CAD files. Some icon dimensions do not conform to their actual dimensions at all. However, the software identifies components according to their actual dimensions rather than dimensions, which leads to the discrepancy between the identified components and the dimensions noted on CAD icons.

Solution 1:

The first step after opening a drawing is to use the CAD query tool to query the scale of the drawing. Note: Do not query the dimension of the axis dimension! (It has been found that the dimension of some drawings is not proportional to the dimension of the column section.) Query the actual pixel of the column and the dimension, and remember the scale. For example, the actual dimension of the column is 3600mm, while the dimension is 5400mm. When importing a CAD drawing, you can directly enter the ratio of the actual size to the marked size as 2:3. In this way, the size of the identified column is correct.

Problem reason 2:

When the imported CAD project is large, the distance between the insertion point and the default origin of the system is too far, resulting in changes in the size of the column after identification. For example, the actual dimension is 400 * 400, but it is 600 * 800 after identification.

Solution 2:

Open the file with CAD software and check the origin coordinates.

Customization Of CAD Importing Environment

Because it is often necessary to switch the display state of CAD in CAD mapping, the shortcut key F6 for displaying CAD drawings does not work in some drawing states. This is due to the proportion of CAD files. Some icon dimensions are not consistent with their actual dimensions at all, while the software recognizes components according to their actual dimensions rather than dimensions, which leads to the discrepancy between the identified components and the dimensions noted on CAD icons.


Click the tool option to assign an uncommon hotkey letter (such as A) to the “CAD drawing”. In the future, if you want to display or hide the CAD drawing, just press “A”.

How To Import CAD With Many Drawings?

How to import many drawings in a CAD file. Some CAD electronic drawings design all drawings of buildings or structures in one DWG file. The software can only import one drawing at a time, so many drawings in one file cannot be directly imported by the software.


Import the DWG file into the graphics software, and then pull the box to select the drawings to be imported. At this time, the selected parts are displayed as blue dotted lines. Then, we pull the box to select all the drawings. Because the software provides us with a reverse selection function, when a drawing is selected, and then all the drawings are selected except the one we just selected. Then click “Delete”. In this way, other graphs that do not need to be imported will be deleted at one time. Directly import the selected drawing.

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