Creation of geometries by Coordinate system methods using AutoCad

                                Creation of geometries by Coordinate system methods using AutoCad

 AIM : 

            To draw a different geometric shape by coordinate system methods using AutoCad.

 Introduction :         

• Coordinate System

1. For the AutoCAD users, understanding the coordinate
   system is very important.
2. In AutoCAD every point in identified
   by its X, Y, and Z coordinates.
3. This system of coordinates is referred
   as the world coordinate system, or
   WCS in AutoCAD.
4. To locate a single point in AutoCAD workspace, the
   user may use any of the following
   three c0ordinates systems

    They are three types, 

      1. Absolute Coordinate System

      2. Relative Coordinate System

      3. Polar Coordinate System

• Absolute Coordinate System (X, Y)

        In absolute coordinate system, all input points are specified using standard Cartesian coordinates X and Y. Ihe syntax
        of absolute coordinate system is [X, Y1.

• Relative Coordinate System (@X, Y)

        After locating the first point, your next point can be entered by specifying the next coordinate relative to the first
        points. The syntax of relative coordinate system is l@X, Y|.

                  1. Relative rectangular Coordinate:  Rectangular coordinate specify each point in a pair of numerical in x and                        y axis.In command line it is represented as @X-axis distance,y-axis distance, example @5,10.

• Polar Coordinate System (@D<A)

        After locating the first point, polar coordinate system can be used when you need to draw the next points at specify
        angle. The syntax of polar coordinate system is [@distance<angle].

 

                                              

• Direct distance entry method:

         It is another popular method used for drawing different shapes/geometries in AutoCAD. Direct distance entry method             enables the user to draw an object by simply pointing the cursor in the desired direction and entering the required distance in the command line.

  PROCEDURE:

    Starting AutoCAD software:

• Go to START MENU, select AutoCAD 2022.
• Click on START DRAWING
• In the Command line type in: STARTUP [ENTER]
• Enter new value of startup: 1
• Go to Application Menu and select New
• In the 'Create New Drawing dialog box, we select the Imperial' system in the 'Start from Scratch' option.
• Next we select the Decimal' unit system from the 'Advanced Setup option.
• Set the limits by entering LIMITS in the Command tab. The lower-left corner is specified as 0,0 ; and the upper-right corner is specified as 100,100.

 

  #  GIVEN GEOMETRY P1 :

   

 A. Using different coordinate system for P-1 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	ABSOLUTE COORDINATR	RELATIVE RECTANGULAR	RELATIVE POLAR	DIRECT DISTANCE
  1.	1 as 2,1	1 as 2,1	1 as 2,1	1 as 2,1
  2.	2 as 8,1	2 as @6,0	2 as @6<0	2 as 6 (+ve x-axis)
  3.	3 as 8,2	3 as @0,1	3 as @1<90	3 as 1 (+ve y-axis)
  4.	4 as 3,2	4 as @-5,0	4 as @5<180	4 as 5 (-ve x-axis)
  5.	5 as 3,6	5 as @0,4	5 as @4<90	5 as 4 (+ve y-axis)
  6.	6 as 8,6	6 as @5,0	6 as @5<0	6 as 5 (+ve x-axis)
  7.	7 as 8,7	7 as @0,1	7 as @1<90	7 as 1 (+ve y-axis)
  8.	8 as 2,7	8 as a-6,0	8 as @6<180	8 as 6 (-ve x-axis)
  9.	Click 'Close' on the   command line.	Click 'Close' on the            command line.	Click 'Close' on the    command line.	Click 'Close' on the    command line.

   RESULT : 

       1. Absolute Coordinate System :

                 

 

      2. Relative Coordinate System :

 

                 

 

      3. Polar Coordinate System :

 

                 

 

     4. Direct distance entry method :

 

                  

 

  #  GIVEN GEOMETRY P2 :

 

          

 B. Using different coordinate system for P-2 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	ABSOLUTE COORDINATR	RELATIVE RECTANGULAR	RELATIVE POLAR	DIRECT DISTANCE
  1.	1 as 2,1	1 as 2,1	1 as 2,1	1 as 2,1
  2.	2 as 5,1	2 as @3,0	2 as @3<0	2 as 3 (+ve x-axis)
  3.	3 as 5,5	3 as @0,4	3 as @4<90	3 as 4 (+ve y-axis)
  4.	4 as 6,5	4 as @1,0	4 as @1<0	4 as 1 (+ve x-axis)
  5.	5 as 6,1	5 as @0,-4	5 as @4<270	5 as 4 (-ve y-axis)
  6.	6 as 9,1	6 as @3,0	6 as @3<0	6 as 3 (+ve x-axis)
  7.	7 as 7,8	7 as @-2,7	7 as @7<108	7 as 7 (+ve X-axis)
  8.	8 as 4,8	8 as @-3,0	8 as @6<180	8 as 3 (-ve x-axis)
  9.	Click 'Close' on the   command line.	Click 'Close' on the            command line.	Click 'Close' on the    command line.	Click 'Close' on the    command line.

 

   RESULT : 

      1. Absolute Coordinate System :

              

 

      2. Relative Coordinate System :

              

 

      3. Polar Coordinate System :

              

 

      4. Direct distance entry method :

              

 

  #  GIVEN GEOMETRY P4 :

            

 C. Using absolute coordinate system for P-4 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	ABSOLUTE COORDINATR
  1.	1 as 2,1
  2.	2 as 3,1
  3.	3 as 3,5
  4.	4 as 5,3
  5.	5 as 7,5
  6.	6 as 7,1
  7.	7 as 8,1
  8.	8 as 8,8
  9.	9 as 7,8
  10.	10 as 5,5
  11.	11 as 3,8
  12.	12 as 2,8
  13.	Click 'Close' on the   command   line.

 

   RESULT : 

      1. Absolute Coordinate System :

              

 

  #  GIVEN GEOMETRY P5 :   

                     

  D. Using relative rectangular coordinate system for P-5 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	Relative rectangular
  1.	1 as 2,1
  2.	2 as @1,0
  3.	3 as @0,7
  4.	4 as @5,0
  5.	5 as @0,-6
  6.	6 as @-3,0
  7.	7 as @0,-1
  8.	8 as @4,0
  9.	9 as @0,8
  10.	10 as @-7,0
  11.	Click 'Close' on the   command   line.

 

   RESULT : 

      1. relative rectangular Coordinate System :

            

 

  #  GIVEN GEOMETRY P7 :   

                     

  E. Using absolute coordinate system for P-7 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	Absolute coordinate
  1.	1 as 2,1
  2.	2 as 10,1
  3.	3 as 10,7
  4.	4 as 2,7
  5.	Click 'Close' on the   command   line.
  6.	5 as 3,2
  7.	6 as 5,2
  8.	7 as 5,5
  9.	8 as 3,5
  10.	Click 'Close' on the   command   line.
  11.	9 as 6,2
  12.	10 as 8,2
  13.	11 as 8,5
  14.	12 as 6,5
  15.	Click 'Close' on the   command   line.

 

   RESULT : 

      1. Absolute Coordinate System :

     

 

 

  #  GIVEN GEOMETRY P8 :   

                     

  F. Using relative rectangular coordinate system for P-8 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• 
  

  SN.NO	Relative rectangular
  1.	1 as 0,0
  2.	2 as @10,0
  3.	3 as @0,2
  4.	4 as @-4,0
  5.	5 as @0,4
  6.	6 as @3,0
  7.	7 as @0,2
  8.	8 as @-8,0
  9.	9 as @0,-2
  10.	10 as @3,0
  11.	11 as @0,-4
  12.	12 as @4,0
  13.	Click 'Close' on the   command   line.

 

   RESULT : 

      1. Relative rectangular Coordinate System : 

     

 

 

  #  GIVEN GEOMETRY P9 :

            

 G. Using absolute coordinate system for P-9 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	ABSOLUTE COORDINATR
  1.	1 as 1,1
  2.	2 as 6,1
  3.	3 as 6,3
  4.	4 as 3,3
  5.	5 as 3,2
  6.	6 as 2,2
  7.	7 as 2,4
  8.	8 as 5,4
  9.	9 as 5,6
  10.	10 as 1,8
  13.	Click 'Close' on the   command   line.

 

   RESULT : 

      1. Absolute Coordinate System :

     

                     

 

  #  GIVEN GEOMETRY P10 :   

                     

  H. Using relative polar coordinate system for P-10 :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	Relative Polar coordinate
  1.	1 as 1,1
  2.	2 as @2<0
  3.	3 as @3<90
  4.	4 as @3<0
  5.	5 as @4<90
  6.	6 as @5<180
  7.	Click 'Close' on the   command   line.
  8.	7 as 5,2
  9.	8 as @3<0
  10.	9 as @2<90
  11.	10 as @3<180
  12.	Click 'Close' on the   command   line.

 

   RESULT : 

      1. Relative rectangular Coordinate System : 

     

 

  #  GIVEN GEOMETRY OF WOOD PROFILE :   

                     

  I. Using direct distance entry coordinate system for :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN:NO	DIRECT DISTANCE
  1.	1 as 0,0
  2.	2 as 10 (+ve x-axis)
  3.	3 as 1 (+ve y-axis)
  4.	4 as 2 (-ve x-axis)
  5.	5 as 4 (+ve y-axis)
  6.	6 as 2 (+ve x-axis)
  7.	7 as 831<149.036 (+ve y-axis)
  8.	8 as 5.831<210.964 (-ve x-axis)
  9.	9 as 2
  10.	10 as 5
  11.	11 as 2
  12.	Click 'Close' on the    command     line.
  13.	Select the circle tool by entering   the CIRCLE command
  14.	Centre point of circle as 5,4
  15.	Specify radius of circle 2

 

   RESULT : 

      1. Direct distance entry System : 

   

 

  #  GIVEN GEOMETRY OF THE QUEEN POST TRUSS :   

                     

  J. Using relative Rectangular coordinate system for :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	Relative Polar coordinate
  1.	1 as 1,1
  2.	2 as @4,0
  3.	3 as @3.536
  4.	4 as @3.536,-3.536
  5.	5 as @0,-4
  6.	Press Esc to cancel the line   command.
  7.	Select the line tool again by   entering line command
  8.	Join the points 2 and 4
  9.	Press Esc to cancel the line   command.
  10.	Select the line tool again by   entering line command
  11.	6 as @4.536,5
  12.	7 as @-2.536,1
  13.	8 as @0,-1
  14.	Press Esc to cancel the line   command.
  15.	Select the line tool again by   entering line command
  16.	6 as @4.536,5
  17.	9 as @2.536,1
  18.	10 as @0,-1
  19.	Press Esc to cancel the line   command.
  20.	Select the line tool again by   entering line command
  21.	Join points 3 and 6
  22.	Press Esc to cancel the line   command.

 

   RESULT : 

      1. Relative rectangular Coordinate System : 

   

 

  #  GIVEN GEOMETRY OF QUEEN MONO PITCH  :   

                     

  K. Using absolute coordinate system for :

         # Select the Line tool by entering 'LINE"

         # Specify the starting coordinate of point in the command line Given Below

• SN.NO	Absolute coordinate
  1.	1 as 1,1
  2.	2 as 7,1
  3.	3 as 7,3
  4.	Click 'Close' on the   command   line.
  5.	4 as 3,1
  6.	5 as 3,1.667
  7.	6 as 5,1
  8.	7 as 5,2.333
  9.	8 as 7,1
  10.	Press Esc to cancel the line   command.

 

   RESULT : 

      1. Absolute Coordinate System :