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Challenge

Creation of geometries by Coordinate system methods using AutoCad

HHemalatha Veerasamy1 Aug 2022

AIM:

1.Create the geometries from P1 to P2 using all the coordinates system methods. And we need to use line tool, and find the missing dimensions.

2.Civil related problems- Draw the profile and the trusses using any coordinate system methods. The dimensions are there for references.

Introduction:
Before going to the drawing we should know about the coordinates systerns.
In Autocad there are two coordinate systems: Cartesian and polar.
To these coordinate systems the absolute and relative coordinates of Autocad as are applicable.
Coordinate Systems: Coordinate system is a system where numbers are used to determine the unique position of points and/or other geometric elements. Also coordinates in AutoCAD can be set by mouse, input (setting) the values of coordinates in the command line and enter coordinates using dynamic input.
There are three types of co-ordinate systems.
1. Absolute coordinate systems
2. Relative coordinate systems
3. Relative rectangular coordinates
4. Relative polar coordinates
5. Direct distance entry
Absolute Coordinate System:
In this system all points are established at some distance in the x & y-axis (sometimes z-axis) from a common origin (usually 0,0).
Relative Coordinate System:
The location of a Relative coordinate is defined by its distance from a reference point. In AutoCAD, when using this system the first point of the drawing/geometry is always absolute, i.e. it is established with respect to origin (0.0) and then all the successive positions are established with respect to their preceding point. This system is further classified as
Relative rectangular coordinates:
It is a coordinate system that specifies each point by a pair of numerical coordinates in the x-axis and y-axis. In this system the points succeeding the first point are typed in as '@x,y' in the command line.
Relative polar coordinates:
This system specifies the distance (length) and angle of a particular point with respect to its previous point. In Relative polar coordinate system, points are established by typing @distance
Commands used:
1. Line command
2. Dimlinear command
3. Text command
4. Circle command
Create the geometries for P1 using all the coordinates system methods:
Procedure:
1.ABSOLUTE CO-ORDINATE SYSTEM:
  1. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  2. Enter the first point as (2,1)
  3. Next, the command as to enter next point,(8,1) (8,2) (3,2) (3,6) (8,6) (8,7) (2,7)
  4. Specify the next point as(2,1),else click on the close in command prompt.

2.RELATIVE RECTANGULR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in the command tab.
  2. Specify the starting co-ordinate of points (1 as 2,1)in command line.
  3. Specify the next co-ordinate of points is (2,@6,0) (3,@0,1) (4,@-5,0) (5,@0,4) (6,@5,0) (7,@0,1) (8,@-6,0) in command line.
  4. Click 'CLOSE' on the command line.

3.RELATIVE POLAR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in command tab.
  2. specify the starting co-ordinates (1 as 2,1) (2 as @ 6<0) (3 as @ 1<90) (4 as @ 5<180) (5 as@ 4<90) (6 as @5<0) (7 as @1<90) and (8 as @6<180 ) in command line.
  3. Click 'CLOSE' on the command line.

4.DIRECT DISTANCE ENTRY METHOD:

  1. Enter the line command tab.
  2. And the length of all points used in the command line to wards the directions.
  3. Enter the 'CLOSE' on the command line.

RESULT:

Create the geometries for P2 using all the coordinates system methods:

Procedure:
1.ABSOLUTE CO-ORDINATE SYSTEM:
  1. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  2. Enter the first point as (2,1)
  3. Next, the command as to enter next point,(5,1) (5,5) (6,5) (6,1) (9,1) (7,8) (4,8)
  4. Specify the next point as(2,1),else click on the close in command prompt.

2.RELATIVE RECTANGULR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in the command tab.
  2. Specify the starting co-ordinate of points (1 as 2,1)in command line.
  3. Specify the next co-ordinate of points is (2 as 3,0) (3 as @0,4) (4 as 1,0) (5 as @0,-4) (6 as @3,0) (7 as @-2,7) (8 as @-3,0) in command line.
  4. Click 'CLOSE' on the command line.

3.RELATIVE POLAR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in command tab.
  2. specify the starting co-ordinates (1 as 2,1) (2 as @ 3<0) (3 as @ 4<90) (4 as @ 1<0) (5 as@ 4<270) (6 as @3<0) (7 as @7<106) and (8 as @3<180 ) in command line.
  3. Click 'CLOSE' on the command line.

4.DIRECT DISTANCE ENTRY METHOD:

  1. Enter the line command tab.
  2. And the length of all points used in the command line to wards the directions.
  3. Enter the 'CLOSE' on the command line.

RESULT:

Create the geometries for P4 - P10 Using any coordinates system methods.

Steps creating the geometry in p-4 using absolute co-ordinate system method.

1.ABSOLUTE CO-ORDINATE SYSTEM:
  1. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  2. Enter the first point as (2,1)
  3. Next, the command as to enter next point,(3,1) (3,5) (5,3) (7,5) (7,1) (3,1) (8,8) (7,8) (5,5) (3,8) (2,8)
  4. Specify the next point as(2,1),else click on the close in command prompt.

RESULT:

Create the geometries for P5 using Relative rectangular co-ordinates system methods:

1.RELATIVE RECTANGULR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in the command tab.
  2. Specify the starting co-ordinate of points (1 as 2,1)in command line.
  3. Specify the next co-ordinate of points is (2 as 3,0) (3 as @0,4) (4 as 1,0) (5 as @0,-4) (6 as @3,0) (7 as @-2,7) (8 as @-3,0) in command line.
  4. Click 'CLOSE' on the command line.

RESULT:

Creating the geometry in p-7 using absolute co-ordinate system method.

1.ABSOLUTE CO-ORDINATE SYSTEM:
  1. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  2. Enter the first point as (2,1)
  3. Next, the command as to enter next point,(2,1) (10,1) (10,7) (2,7)
  4. Click on the close in command prompt.
  5. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  6. Next, the command as to enter next point,(3,2) (5,3) (5,5) (3,5)
  7. Click on the close in command prompt.
  8. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  9. Next, the command as to enter next point,(6,2) (8,2) (8,5) (5,6)
  10. Click on the close in command prompt.

RESULT:

Create the geometries for P-8 using Relative rectangular co-ordinates system methods:

1.RELATIVE RECTANGULR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in the command tab.
  2. Specify the starting co-ordinate of points (1 as 0,0)in command line.
  3. Specify the next co-ordinate of points is (2 as @10,0) (3 as @0,2) (4 as @-4,0) (5 as @0,4) (6 as @3,0) (7 as @0,2) (8 as @-8,0) (9 as @0,-2) (10 as @0,-2) (11 as @0,-4) (12 as @-4,0)in command line.
  4. Click 'CLOSE' on the command line.

RESULT:

Creating the geometry in p-9 using absolute co-ordinate system method:

1.ABSOLUTE CO-ORDINATE SYSTEM:
  1. Select line tool from the ribbon tab/write line in command box,it will show "specify the first point ".
  2. Enter the first point as (1,1)
  3. Next, the command as to enter next point,(6,1) (6,3) (3,3) (3,2) (2,2) (2,4) (5,4) (5,6) (1,8)
  4. Specify the next point as(1,1),else click on the close in command prompt.

RESULT:

Creating the geometry in p-10using Relative polar co-ordinate system method:

RELATIVE POLAR CO-ORDINATE SYSTEM:

  1. Select the line tool by entering line command in command tab.
  2. specify the starting co-ordinates (1 as 1,1) (2 as @ 2<0) (3 as @ 3<90) (4 as @ 3<0) (5 as @ 4<90) (6 as @5<180) (7 as @5,2) and (8 as @3<0) (9 as @2<90) (10 as @3<180) in command line.
  3. Click 'CLOSE' on the command line.

RESULT:

(B) CIVIL REALTED PROBLEMS:- DRAW THE PROFILE AND THE TRISSES USING ANY CO-ORDINATE SYSTEM METHODS:

The dimensions are there for references,

CREATING THE WOOD PROFILE USING DIRECT DISTANCE ENTRY METHOD:

PROCEDURE:

  1. Select the Line tool by entering 'LINE' command in the command tab.
  2. Specify the starting coordinate of point 1 as 0,0 in the command line.
  3. Enter the length of point 2 as 10 in the command line towards +ve x-axis.
  4. Enter the length of point 3 as 1 in the command line towards +ve y-axis.
  5. Enter the length of point 4 as 2 in the command line towards -ve x-axis.
  6. Enter the length of point 5 as 4 in the command line towards +ve y-axis.
  7. Enter the length of point 6 as 2 in the command line towards +ve x-axis.
  8. Enter the length of point 7 as 831 in the command line at an angle of <149.036 from +ve x-direction while keeping polar tracking on.
  9. Enter the length of point 8 as 5.831 in the command line at an angle of <210.964 from +ve x-direction while keeping polar tracking on.
  10. Enter the length of point 9 as 2 in the command line towards +ve x-axis.
  11. Enter the length of point 10 as 5 in the command line towards -ve y-axis.
  12. Enter the length of point 11 as 2 in the command line towards +ve x-axis.
  13. Click 'Close' on the command line.
  14. Select the Circle tool by entering 'CIRCLE' command in the command tab.
  15. Specify centre point of circle as 5,4.
  16. Specify radius of circle as 2.

RESULT:

CREATING THE QUEEN POST TRUSS USING RELATIVE RECTANGULAR CO-ORDINATES SYSTEM:

PROCEDURE:

  1. Select the Line tool by entering 'LINE command in the command tab.
  2. Specify the starting coordinate of point 1 as 1,1 in the command line.
  3. Specify the next coordinate of point 2 as @4,0in the command line.
  4. Specify the next coordinate of point 3 as @3.536,3.536 in the command line.
  5. Specify the next coordinate of point 4 as @3.536,-3.536 in the command line. vi. Specify the next coordinate of point 5 as @0,-4 in the command line.
  6. Press 'Esc' to cancel the LINE command.
  7. Select the Line tool again by entering 'LINE' command in the command tab. ix. Join the points 2 and 4. x. Press 'Esc' to cancel the LINE command. xix. Specify the next coordinate of point 10 as @0,-1 in the command line. xx. Press 'Esc' to cancel the LINE command. xxi. Select the Line tool again by entering 'LINE' command in the command tab.
  8. Select the Line tool again by entering 'LINE' command in the command tab.
  9. Specify the next coordinate of point 6 as 4.536,5 in the command line. xiii. Specify the next coordinate of point 7 as @-2.536,1 in the command line.
  10. Specify the next coordinate of point 8 as @0,-1 in the command line.
  11. Press 'Esc' to cancel the LINE command. xvi. Select the Line tool again by entering 'LINE' command in the command tab.
  12. Specify the coordinate of point 6 as 4.536,5 in the command line.
  13. Specify the next coordinate of point 9 as @2.536.1 in the command line.
  14. Join points 3 and 6
  15. Press Esc' to cancel the LINE command.

RESULT:

CREATING THE MONO PITCH USING ABSOLUTE CO-ORDINATE SYSTEM:

PROCEDURE:

  1. Select the Line tool by entering 'LINE' command in the command tab.
  2. Specify the starting coordinate of point 1 as 1,1 in the command line.
  3. Specify the next coordinate of point 2 as 7,1 in the command line.
  4. Specify the next coordinate of point 3 as 7,3 in the command line.
  5. Click 'Close' on the command line.
  6. Select the Line tool by entering 'LINE' command in the command tab.
  7. Specify the next coordinate of point 4 as 3,1 in the command line.
  8. Specify the next coordinate of point 5 as 3,1.667 in the command line.
  9. Specify the next coordinate of point 6 as 5,1 in the command line.
  10. Specify the next coordinate of point 7 as 5,2.333 in the command line.
  11. Specify the next coordinate of point 8 as 7,1 in the command line.
  12. Press 'Esc' to cancel the LINE command.

RESULT:

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