Book Image

Getting Started with DraftSight

By : JOAO ANTONIO C DOS SANTOS
Book Image

Getting Started with DraftSight

By: JOAO ANTONIO C DOS SANTOS

Overview of this book

Computer-aided design (CAD) uses computer systems to assist in the creation, modification, and analysis of a design. DraftSight is a 2D computer-aided design (CAD) software application. DraftSight includes all the main tools to draft with precision, and it works with DWG files, the most popular CAD file type. It runs on a wide variety of operating systems, including Windows, Mac, and Linux. Getting Started with DraftSight addresses all the main phases for executing and printing a mechanical project. These concepts and commands can easily be applied to other areas. Beginning with the very basic concepts, and going through all the necessary drawing steps, you will finish by printing a full scale mechanical drawing. The illustrative examples will help you understand the design process and teach you how to utilize DraftSight features in your mechanical design projects. You will start with an overview of the mechanical design process, which will help you understand the different commands, tools, and tasks involved in DraftSight projects. You will then proceed to executing all the phases of the design process. This includes setting up a drawing, drawing and editing with precision, organizing with layers, and finally obtaining valid information from the drawing. Furthermore, you will also learn to apply fills, patterns, and dimensions, and the process of defining and printing sheets. With "GettingStarted with DraftSight" you will learn how to specify and document parts and print drawings with the help of DraftSight. Towards the end of this book you will be introduced to some advanced concepts like additional layer commands, and methods to reference other drawings or images, which can be very useful when dealing with complex projects.
Table of Contents (18 chapters)
Getting Started with DraftSight
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Defining coordinates


An essential step in all CAD programs is to draw with precision. Defining entity points like endpoints of a segment line or a circle center, without any doubt is a constant process, which can be achieved by introducing coordinates, absolute or relative. There are also several auxiliary tools that ease the process, as shown later in the chapter.

Absolute coordinates

DraftSight uses a Cartesian system, with an origin and three orthographic axes: X, Y, and Z. All points are referenced with coordinates related to these axes. In 2D drawings, the Z coordinate can be omitted.

So, to define a 2D point in absolute coordinates, two values must be set: the first along the X axis and the second along the Y axis, separated by a comma:

X_value,Y_value

Examples, as displayed in following diagram, are the points -2,3; -3,-2; 1,-2; or 4,2.

Note

Absolute coordinates are mainly used with georeferenced drawings or in 3D models. In Mechanical Drafting normally there is no need for these coordinates...