Cad drawing beginners often use cad in their work and study. It is the entry threshold for architectural design, interior design and many other fields. More and more people want to learn cad. Let's take a look at the introductory course of cad drawing first.
Introduction to cad drawing 1 master the correct method to learn AutoCAD.
1. Some beginners get poor grades in learning AutoCAD, which is often caused by low interest in learning and low learning efficiency. Interest is the best teacher. Beginners learning AutoCAD should regard the process of learning and operation as learning a new video game.
2. The whole learning process should adopt a step-by-step approach. To learn and master AutoCAD well, we must first know how to draw by hand, and be very clear about the geometric knowledge of drawing methods used in the drawing process. Only in this way can we further consider how to do it with AutoCAD. Practice has proved that AutoCAD has strong drawing and geometric drawing ability, is easy to learn and has good effect. Then I understand the basic knowledge of computer drawing such as relative rectangular coordinates and relative polar coordinates, so that I can master the use technology of AutoCAD from simple to complex.
3. One advantage of studying cad course is that you can draw accurately. Accurate drawing means accurate size and drawing in place. Parallel lines must be parallel; For an angle formed by two lines, the vertices must coincide. When the dimensions are not drawn according to the standard, the data need to be modified when the dimensions are marked, which not only affects the beauty of the drawing, but also directly affects the authenticity of the drawing, so we should be very careful and step by step in the drawing process to be accurate.
The purpose of computer drawing is to improve the drawing speed and efficiency, and the fastest operation mode is to use shortcut keys. Therefore, when drawing graphics with AutoCAD, we should try our best to remember and use shortcut keys so that both hands can work, thus improving the speed of drawing graphics. To execute a command in drawing, you can directly enter the shortcut key of the command with your left hand (without moving the cursor to the command line), and then click the right mouse button with your right hand, which is the same as clicking the command icon with your left mouse button.
For example, to execute the move command, you can enter "m" with your left hand (the command line is not case sensitive), and then click the right mouse button with your right hand to execute the move command. Shortcut keys of common commands, such as: offset "O ",fill "H", cut "TR ",extend "EX", write blocks (blocks used in different graphics files) "w", multiline text "T ",about (back)" u ",real-time translation of" p ",and creation of arcs" a "and straight lines.
Common on-off keys are capture F3, orthogonal F8, polar axis F 10 and object tracking F 1 1. Give beginners a simple suggestion. At the beginning of learning AutoCAD, try to use shortcut commands to draw their own practice graphics.
5. When learning AutoCAD commands, we should always combine the actual application, and don't spend the main energy on learning each command in isolation; The principle of applying what you have learned should run through the whole learning process, so that you can have a profound and vivid understanding of drawing commands, which is conducive to cultivating your ability to complete drawing independently with AutoCAD. We should force ourselves to make several comprehensive examples and draw the graphics in detail, so as to grasp the whole drawing process from a global perspective and strive to devote ourselves to practical work after learning AutoCAD.
Skills of using AutoCAD to improve drawing efficiency
1. follows certain drawing principles.
(1) Drawing steps: set the map sheet → set the unit and precision → establish several layers → set the object style → start drawing.
(2) The drawing always uses the ratio of 1: 1. In order to change the size of the pattern, different printing scales can be set in the paper space when printing.
(3) Set different layers, colors and linewidths for different types of primitive objects, and control the colors, linetypes and linewidths of primitive pairs hierarchically.
(4) When drawing accurately, you can use the grid capture function to set the grid capture interval to an appropriate value.
(5) Don't draw picture frames and figures on the same picture. Insert a picture frame in the layout, and then print out the picture.
(6) For famous objects, such as views, layers, blocks, lines, text styles, printing styles, etc. The naming should not only be concise, but also follow certain rules to facilitate the search and use.
(7) Set some common settings, such as layer, label style, text style, grid capture, etc. , in the graphic template file (that is, save as *. DWF)。 When drawing a new drawing in the future, you can click Use Template in the Create New Drawing wizard to open it and start drawing.
Step 2 choose the right command
In the process of AutoCAD operation, although there are many formulas that can achieve the same goal, if the command is properly selected, the operation steps will be significantly reduced and the drawing efficiency will be improved. The following are just typical cases.
Generate a line or segment
① In the initial stage of cad drawing, you can use commands such as LINE, XLINE, RAY, PLINE and MLINE to generate straight lines or line segments, but only the command of line is used most frequently and flexibly.
(2) In order to ensure the correspondence of "long alignment, equal width and high level" among three views of an object, we should choose XLINE and RAY commands to draw several auxiliary lines, and then use TRIM to cut off the redundant parts.
③ If you want to quickly generate a closed filled boundary or construct an area, you should choose the PLINE command. Line segments generated by PLINE can be edited by PEDIT command.
④ When multiple parallel line segments are generated at one time, and each line segment may use different colors and linetypes, you can choose the MLINE command.
Introduction to cad drawing 2 1, distinguish the basic knowledge of design objects and be familiar with 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, we 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 us to improve and improve our technology in the future.
3. The foundation is learning outside the software.
You also 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.
Extended data
Drawing principles that CAD drawing should follow;
1. Drawing steps: Set the map sheet, set the unit and precision, establish several layers, set the object style, and start drawing.
2. The graph always uses the ratio of 1: 1. In order to change the size of the pattern, you can set different printing scales when printing and in paper space.
3. Set different layers, colors and line widths for different types of primitive objects, and control the color, line type and line width of primitive pairs in layers.
4. When drawing accurately, you can use the grid capture function and set the grid capture interval to an appropriate value.