2. When you press F8, straight lines can only be drawn on these two axes, either parallel to the X axis and perpendicular to the Y axis, or perpendicular to the X axis and parallel to the Y axis.
The angle between these two axes is 90 degrees, which is convenient for you to draw more accurate angles and figures according to these two axes when drawing.
Extended data:
1, CAD technology, as an excellent engineering achievement, has been widely used in various fields of engineering design. With the development and application of CAD system, the traditional product design method and production mode have undergone profound changes, resulting in great social and economic benefits.
2. At present, the research hotspots of CAD technology include computer-aided conceptual design, computer-supported collaborative design, massive information storage, management and retrieval, research on design methods and related issues, and support for innovative design. It can be predicted that there will be a new leap in technology and a design change.
3.CAD technology has been in constant development and exploration. The application of CAD technology has played a certain role in improving enterprise design efficiency, optimizing design scheme, reducing the labor intensity of technicians, shortening design cycle and strengthening design standardization. More and more people realize that CAD is a great productivity.
4.CAD technology has been widely used in machinery, electronics, aerospace, chemical industry, construction and other industries. Design methods such as concurrent design, collaborative design, intelligent design, virtual design, agile design and life cycle design represent the development direction of modern product design mode.
5. With the further development of artificial intelligence, multimedia, virtual reality, information and other technologies, CAD technology will inevitably develop in the direction of integration, intelligence and collaboration.
6, enterprise CAD and CIMS technology must take a step-by-step road with e-commerce as the goal. Realize integrated, intelligent and networked management from within the enterprise, cross enterprise boundaries with e-commerce, and realize a real agile supply chain for customers, enterprises and suppliers.
7. It mainly includes interactive technology, graphic transformation technology, surface modeling and solid modeling technology.
8. In computer-aided design, interactive technology is essential. Interactive CAD system means that when users design with computer system, people and machines can exchange information in time. With the interactive system, people can conceive, sample and modify at the same time, and the display results of each step can be seen from the screen of the graphic terminal at any time, which is very intuitive.
9. The main function of graphic transformation is to connect the user coordinate system with the coordinate system of graphic output equipment; Translation, rotation, scaling and perspective transformation of graphics; Graphic transformation is realized by matrix operation.
10, computer design automation Computer-owned CAD aims to realize the automation or semi-automation of computer-owned design and development process.
1 1. The research contents include functional design automation and assembly design automation, involving computer hardware description language, system-level simulation, automatic logic synthesis, logic simulation, microprogram design automation, automatic logic division, automatic layout and wiring, and corresponding interactive graphics system and engineering database system. Integrated circuit CAD is sometimes included in the scope of computer design automation.
References:
Baidu encyclopedia -CAD