Self-study cad foundation, for those who study CAD, it is one thing to master CAD skills, and also need to master CAD shortcut keys, which can help improve drawing efficiency! The following is the basic self-study of cad for everyone.

Self-study 1 foundation is very important, step by step, apply what you have learned, and practice makes perfect.

First, the foundation is very important

Practice has proved that the drawing ability of "manual sketchpad" is the basis of computer drawing ability. Learning AutoCAD requires a certain knowledge and ability of descriptive geometry and a certain drawing ability, especially geometric drawing ability. Generally speaking, people with high hand-drawing level are easier to learn and have better effects.

Second, step by step.

The whole learning process should adopt a step-by-step approach. First of all, we should understand the basic knowledge of computer drawing, such as relative rectangular coordinates and relative polar coordinates, so as to master the use technology of AutoCAD from simple to complex.

Third, apply what you have learned.

When learning AutoCAD commands, we should always combine practical applications, and don't spend our main energy on learning each command in isolation; The principle of applying what you have learned runs through the whole learning process, which makes you have a profound and vivid understanding of drawing commands and is conducive to cultivating your ability to complete drawing independently with AutoCAD.

Fourth, practice makes perfect.

Force yourself to make a few comprehensive examples and draw the graphics in detail, so that you can master the whole drawing process from a global perspective.

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Skills:

1, the same drawing, some people draw a moderate size, some people draw a small figure, or even can't see it, because they didn't set the boundary of the drawing area, or although they set it with the LIMITS command, they forgot to reorganize the drawing area with the all option in the ZOOM command. The setting of drawing area is based on the actual drawing needs.

2. Someone "hides" a line segment with the line name, only to find that the drawn line segment looks like a solid line, which is caused by improper line scale, that is, the line scale is too large or too small. The solution to this problem is to open the Line Manager dialog box and modify its Global Scale Factor to an appropriate value.

Self-study cad basics 2 projection basics: projection method, point, line, surface and stereo projection.

Configuration design: conceive the shape of assembly, the basic principle of computer modeling technology, and carry out the modeling process and method of basic three-dimensional and simple assembly according to known conditions.

Expression method: the expression of assembly, axonometric drawing, parts and assembly.

Drawing skills: freehand drawing method, steps and methods of straightedge drawing, methods of drawing projection of basic body and assembly by computer, methods of modeling basic body and simple assembly by computer.

Cartographic specification: the basic provisions of national standards for technical and mechanical drawings, CAD standards, views, drawing methods and dimensioning methods, and the reading of projection drawings of objects containing the above contents.

Drawing and reading professional drawings: drawing and reading engineering drawings related to this major, and correctly understanding the shape, size and technical requirements.

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Engineering drawing mainly consists of the following modules:

1. Basic knowledge of drawing: including drawing standards and drawing plane drawings.

2. Basic drawing skills: including ruler drawing, freehand drawing and computer drawing.

3. Basic theory: including descriptive geometry and related drawing theory.

4. Basis of pattern expression: including projection of objects and pattern expression methods.

5. Read and draw part drawings and assembly drawings, etc.

3 1, distinguish the basic knowledge of the design object and be familiar with the software.

If you want to make good drawings with CAD, you must first understand what kind of drawings you want to make. If you know what you want to do, there is no way to continue your study. In CAD, if we know the types of drawings to be made, it will bring us a lot of convenience, because there are many classifications to choose from, such as electrical design, clothing design and so on.

Then get familiar with the operation interface and functions in the software. In each software, there will be different shortcut keys to correspond to some related functions. Functional memory of memory shortcuts can bring us a lot of convenience and let us know what we can do with this software.

2. Master the basic operation and design process.

Most novices will be dazzled when they look at the design drawings made by CAD, because they are too complicated. In fact, this design is not responsible at all in the software, because it divides the design into many layers, and each layer is a pattern or line.

Before learning CAD, you need to know what these layers need to do, what functions they have, what effects they will have and so on. It is convenient for subsequent improvement and refinement of technology.

3. The foundation is learning outside the software.

Knowing the basic operation doesn't mean drawing. You need to know something other than software. For example, only by understanding the specifications of fonts, formats and lines in different industries can we use CAD to make drawings that meet the requirements.

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Basic CAD skills:

I. Template file

1. Create your own template file, so that you can set it according to your own preferences and form your own style.

2. Generally, the following settings should be made in the template file: unit, precision, layer (color, line type and line width), text style, annotation style, compound line type, default line width, default font and default word height, and capture type.

3. Naming: Naming according to the map size, such as A3.dwt, A2.dwt, etc.

4. Location: It is recommended that the template file be placed in the AutoCAD installation directory for easy search and can be changed in the options dialog box.

Second, the use of layers.

1. It is best to use English abbreviations for layer naming, and less Chinese characters.

2. Set the number of floors reasonably according to your own professional needs, and it should be less than more.

3. The attributes of the object (color, line type and line width) are all along the layer, which is convenient for modifying the object.