Creation of geometries by Coordinate system methods using AutoCad

Aim- To draw geometries using all the coordinates system methods and by using line tool and circle tool wherever required.

Introduction-

• AutoCAD-
  • AutoCAD is a commercial computer-aided design (CAD) and drafting software application. Developed and marketed by Autodesk.
  • Before the invention of AutoCAD, all designing and modeling were done manually. This was a time-consuming task and resulted in a lot of costly errors. But, with the invention of AutoCAD, the process of modeling and designing got digitalized and simplified. A technology that has emerged as a solution to most of the designers, engineers, and architects.
  • AutoCAD is used in industry, by architects, project managers, engineers, graphic designers, city planners and other professionals.
  • AutoCAD can work on plans that include creating architectural arrangements for construction purposes.
• Coordinate systems in AutoCAD-
  • There are 3 coordinate systems which are used in AutoCAD.
  • Absolute coordinate system-
    • This system used when you know the precise X and Y values of the point.
    • Absolute coordinates refers to a Cartesian System that uses x-axis, y-axis to establish the location of points.
  • Relative coordinate system-
    • When you know the location of a point in relation to the previous point. To specify relative coordinates, precede the coordinate values with an @ sign.
    • For example, entering @3,4 specifies a point 3 units along the X axis and 4 units along the Y axis from the last point specified.
  • Direct distance entry-
    • This system is used when you know all the distances between all the points.
    • i.e. by entering the distance of the second point from first point. so on.

Procedure-

1. Creating geometries by using Relative coordinate system. (P-1 & P-2)

• Relative coordinate system-
  • When you know the location of a point in relation to the previous point. To specify relative coordinates, precede the coordinate values with an @ sign.
  • For example, entering @3,4 specifies a point 3 units along the X axis and 4 units along the Y axis from the last point specified.

P-1

P-2

2. Creating geometries by using Direct distance entry . (P-1 & P-2)

• Direct distance entry-
  • This system is used when you know all the distances between all the points.
  • i.e. by entering the distance of the second point from first point. so on.

P-1

P-2

3. Creating ALL geometries by using absolute coordinate system.

• Absolute coordinate system-
  • This system used when you know the precise X and Y values of the point.
  • Absolute coordinates refers to a Cartesian System that uses x-axis, y-axis to establish the location of points.

P-1

P-2

P-4

P-5

P-7

P-8

P-9

P-10

4. Drawing the profile and the trusses using absolute coordinate system methods.

1. Profile- Wood

2.Queen post truss

3. Mono pitch truss

Result-

1. Geometries P-1 & P-2 are drawn by using all the coordinate systems.
2. All the geometries are drawn by absolute coordinate system.
3. Civil related drawings are drawn by absolute coordinate system.