Introduction to CAD

Introduction to CAD Terms & Definitions  CAD  Absolute Coordinates CADD  Relative Coordinates AutoCAD  Polar Coordinates Cartesian Coordinates Coordinates Origin Axes X axis & Y axis

Introduction to CAD CAD stands for: Computer Aided Drafting Acronym & AutoCAD  CAD stands for: Computer Aided Drafting Computer Aided Design CADD stands for: Computer Aided Drafting & Design AutoCAD is a CAD software program developed by the AutoDesk Corporation.

Introduction to CAD What is CAD used for?  CAD is a tool that can be used for design and drafting activities. It can be used to: make “rough” drawings, although it is more suited to create accurate finished drawings. create 2D or 3D computer models, for analysis supply manufacturing equipment with production instructions. create 2D drawings for communicating and archiving.

Introduction to CAD Accuracy Productivity for Repetitive Operations Benefits of CAD  Accuracy Productivity for Repetitive Operations Ability to share the CAD file with other software programs.

Introduction to CAD Why USE AutoCAD  AutoCAD is a world leader in the market for CAD programs. Out of all CAD programs you are most likely to use AutoCAD in the industry. AutoCAD gives you a strong foundation for learning other CAD programs.

The three main types of point entry in CAD are: Introduction to CAD How does AutoCAD work?  AutoCAD uses the coordinate system to plot information in the drawing area/workspace. The three main types of point entry in CAD are: Absolute Coordinates Relative Coordinates Polar Coordinates

Introduction to CAD How does AutoCAD work?  Every object you draw is placed on either the world coordinate system (WCS) or a user coordinate system (UCS). When you create 2D geometry, data input is ultimately passed to the software in the form of a Cartesian or Polar coordinate. You can either manually enter these coordinates or infer them by picking a point on the screen.

Cartesian Coordinates (System)  Introduction to CAD Cartesian Coordinates (System)  The coordinates of a point are its distance from a set of perpendicular lines that intersect at the origin of the system. (Axes)

Introduction to CAD Cartesian Coordinates (system)  Origin: the point of intersection of coordinate axes Axes: A reference line from which distances or angles are measured in a coordinate system

Introduction to CAD X axis represents the horizontal direction Cartesian Coordinate  X axis represents the horizontal direction Y axis represents the vertical direction

Absolute Coordinates  Introduction to CAD Absolute Coordinates  Represent the actual location on the current coordinate system….in reference to the origin.

Activity ! ! ! Absolute Coordinates  Activity 1 : Absolute Coordinates Worksheet Groups: N/A Instruction: Instructor Materials: Worksheet/Pencil/Colored Pencil Activity 2 : My Coordinates

The three main types of point entry in CAD are: Introduction to CAD Coordinate Systems  AutoCAD uses the coordinate system to plot information in the drawing area/workspace. The three main types of point entry in CAD are: Absolute Coordinates Relative Coordinates Polar Coordinates

Introduction to CAD Relative Coordinates  A point or location calculated from a previously selected point…..

Relative Coordinates  Introduction to CAD Relative Coordinates  Use relative coordinates when you know the position of a point in relation to the previous point entered/used.

Relative Coordinates  Introduction to CAD Relative Coordinates  To enter a relative coordinate, precede the coordinate with the @ symbol.

Relative Coordinates  Introduction to CAD Relative Coordinates  For example, the coordinate @3,4 specifies a point 3 units along the X axis and 4 units along the Y axis from the last point specified or plotted.

Activity ! ! ! Relative Coordinates  Activity 1 : Modifying: Absolute to Relative Groups: N/A Instruction: Miss. Conner Materials: My Coordinates Act/Pencil/Colored Pencil

The three main types of point entry in CAD are: Introduction to CAD Coordinate Systems  AutoCAD uses the coordinate system to plot information in the drawing area/workspace. The three main types of point entry in CAD are: Absolute Coordinates Relative Coordinates Polar Coordinates

Introduction to CAD Polar Coordinates  Two values that locate a point by giving its distance and angle from a start point.

Format is: @distance<degree Introduction to CAD Polar Coordinates  Format is: @distance<degree

Introduction to CAD Polar Coordinates  90º 180º 0º / 360º 270º

Activity ! ! ! Relative Coordinates  Activity 1 : Modifying: Absolute/Relative to Polar Groups: N/A Instruction: Miss. Conner Materials: My Coordinates Act/Pencil/Colored Pencil