Creation of geometries by Coordinate system methods using AutoCad

1) AIM :- To create the given geometries and trusses in Autocad, using the different coordinate system methods and the line and circle drawing tools.

Geometries P-1 and P-2 drawn using aby one of the cordinate system .

INTRODUCTION :

• Absolute Coordinate system:-In this system all points are established at some distance in the x&y axis from a common origin.
• Relative Coordinate system :-The Location of relative coordinate is defined by its distance from a reference point.In Autocad ,when using this system the first point of the drawing is always absolute i.e. it is established with respect to origin and then all the successive positions are established with respect to their proceding point. This system is further classified into :=
• Relative rectangular coordinates :-It is a coordinate system that specifies each point by pair of numerical cordinates in the x axis and y axis .
• Relative polar coordinates :-This system specifies the distance and angle of a particular point with respect to its previous point.In relative polar coordinate system points are established by typing in as @distance

Direct Distance entry method :-It is another popular method used for drawing different shapes in autocad.Direct distance entry method enables the user to draw an object by simply pointing the cursor in the desired direction and enetring the required distance in the command line.

Procedure:-

• Go to START Menu,Select autocad.
• Click on start drawing .
• In the command line type :STARTUP(ENTER)
• Enter new value of startup:1
• Go to application menu and select new
• In the create new drawing dialogue box we select the imperial system in the start from scratch option.
• Next we select the decimal unit system fron advanced setup option.
• Set the limits by entering LIMITS in the command tab.The lower left corner is specified as0,0 and the upper right is specified as 100,100.

Drafting the geometry given in P1:-

• Using absolute cordinate system
• i)Select the line tool by entering 'LINE' command tab.
• ii)Specify the next coordinate of point 1 as 2.1 in the command line.
• iii)Specify the next coordinate of point as 2 8,1 in the co0mmand line.
• iv) Specify the next coordinate of point 3 as 8,2 in the command line.
• v)Specify the next coordinate of point 4 as 3,2 in the command line.
• vi)Specify the next coordinate of point 5 as 3,6 in the command line.
• vii)Specify the next coordinate of point 6 as 8,6 in the command line.
• viii)Specify the next coordinate of point 7 as 8,7 in the command line.
• ix)Specify the next coordinate of point 8 as 8,7 in the command line.
• x)Click 'CLOSE' on the command line.

RESULT:-

Using Relative Rectangular coordinate system :-

i)

• i)Select the line tool by entering 'LINE' command tab.
• ii)Specify the next coordinate of point 1 as 2.1 in the command line.
• iii)Specify the next coordinate of point 2 as @6,0 in the co0mmand line.
• iv) Specify the next coordinate of point 3 as @0,1 in the command line.
• v)Specify the next coordinate of point 4 as @-5,0 in the command line.
• vi)Specify the next coordinate of point 5 as @0,4 in the command line.
• vii)Specify the next coordinate of point 6 as @5,0 in the command line.
• viii)Specify the next coordinate of point 7 as @0,1 in the command line.
• ix)Specify the next coordinate of point 8 as @-6,0 in the command line.
• x)Click 'CLOSE' on the command line.

Result :-

Using Relative Polar coordinate system :-

• i)Select the line tool by entering 'LINE' command tab.
• ii)Specify the next coordinate of point 1 as 2.1 in the command line.
• iii)Specify the next coordinate of point 2 as @6<0 in the co0mmand line.
• iv) Specify the next coordinate of point 3 as @1<90 in the command line.
• v)Specify the next coordinate of point 4 as @5<180 in the command line.
• vi)Specify the next coordinate of point 5 as @4<90 in the command line.
• vii)Specify the next coordinate of point 6 as @5<0 in the command line.
• viii)Specify the next coordinate of point 7 as @1<90 in the command line.
• ix)Specify the next coordinate of point 8 as @6<180in the command line.
• x)Click 'CLOSE' on the command line.

Result :-

Drafting Geaometry given in P-2:-

• Using absolute cordinate system
• i)Select the line tool by entering 'LINE' command tab.
• ii)Specify the next coordinate of point 1 as 2,1 in the command line.
• iii)Specify the next coordinate of point as 2 5,1 in the co0mmand line.
• iv) Specify the next coordinate of point 3 as 5,5 in the command line.
• v)Specify the next coordinate of point 4 as 6,5 in the command line.
• vi)Specify the next coordinate of point 5 as 6,1 in the command line.
• vii)Specify the next coordinate of point 6 as 9,1 in the command line.
• viii)Specify the next coordinate of point 7 as 7,8 in the command line.
• ix)Specify the next coordinate of point 8 as 4,8 in the command line.
• x)Click 'CLOSE' on the command line.

Result:-

Using Relative Rectangular coordinate system :-

i)

• i)Select the line tool by entering 'LINE' command tab.
• ii)Specify the next coordinate of point 1 as 2,1 in the command line.
• iii)Specify the next coordinate of point 2 as @3,0 in the co0mmand line.
• iv) Specify the next coordinate of point 3 as @0,4 in the command line.
• v)Specify the next coordinate of point 4 as @1,0 in the command line.
• vi)Specify the next coordinate of point 5 as @0,-4 in the command line.
• vii)Specify the next coordinate of point 6 as @3,0 in the command line.
• viii)Specify the next coordinate of point 7 as @-2,7 in the command line.
• ix)Specify the next coordinate of point 8 as @3,0 in the command line.
• x)Click 'CLOSE' on the command line.

Result:-

Using Relative Polar coordinate system :-

• i)Select the line tool by entering 'LINE' command tab.
• ii)Specify the next coordinate of point 1 as 2,1 in the command line.
• iii)Specify the next coordinate of point 2 as @3<0 in the command line.
• iv) Specify the next coordinate of point 3 as @4<90 in the command line.
• v)Specify the next coordinate of point 4 as @1<0 in the command line.
• vi)Specify the next coordinate of point 5 as @4<270 in the command line.
• vii)Specify the next coordinate of point 6 as @3<0 in the command line.
• viii)Specify the next coordinate of point 7 as @7<106 in the command line.
• ix)Specify the next coordinate of point 8 as @3<180 in the command line.
• x)Click 'CLOSE' on the command line.

Result :-

• Drafting Geometry given in P-4:-

Using Absolute coordinate system:-

i)Select the line tool by enetring LINE command in the command tab.

ii)Specify the starting co ordinate of point 1 as 2,1 in the command line.

iii)Specify the next coordinate of point 2 as 3,1 in the command line.

iv)Specify the next coordinate of point 3 as 3,5 in the command line.

v)Specify the next coordinate of point 4 as 5,3 in the command line.

vi)Specify the next coordinate of point 5 as 7,5 in the command line.

vii)Specify the next coordinate of point 6 as 7,1 in the command line.

viii)Specify the next coordinate of point 7 as 8,1 in the command line.

ix)Specify the next coordinate of point 8 as 8,8 in the command line.

x)Specify the next coordinate of point 9 as 7,8 in the command line.

xi)Specify the next coordinate of point 10 as 5,5 in the command line.

xii)Specify the next coordinate of point 11 as 3,8 in the command line.

xiii)Specify the next coordinate of point 12 as 2,8 in the command line.

xiv)Click 'CLOSE' on the command line.

Result:-

• Drafting The geometry given in P-5 using relative rectangular coordinate system :-

i)Select the line tool by enetring LINE command in the command tab.

ii)Specify the starting co ordinate of point 1 as 2,1 in the command line.

iii)Specify the next coordinate of point 2 as @1,0 in the command line.

iv)Specify the next coordinate of point 3 as @0,7 in the command line.

v)Specify the next coordinate of point 4 as @5,0 in the command line.

vi)Specify the next coordinate of point 5 as @0,-6 in the command line.

vii)Specify the next coordinate of point 6 as @-3,0 in the command line.

viii)Specify the next coordinate of point 7 as @0,-1 in the command line.

ix)Specify the next coordinate of point 8 as @4,0 in the command line.

x)Specify the next coordinate of point 9 as @0,8 in the command line.

xi)Specify the next coordinate of point 10 as @-7,0 in the command line.

xii)Click 'CLOSE' on the command line.

Result:-

• Drafting the geometry given in P-7 using absolute coordinate system :-

i)Select the line tool by enetring LINE command in the command tab.

ii)Specify the starting co ordinate of point 1 as 2,1 in the command line.

iii)Specify the next coordinate of point 2 as 10,1 in the command line.

iv)Specify the next coordinate of point 3 as 10,7 in the command line.

v)Specify the next coordinate of point 4 as 2,7 in the command line.

vi)Click 'CLOSE' on the command line.

vii)Select the line tool by enetring LINE command in the command tab.

viii)Specify the next co-ordinate of point 5 as 3,2 in the command line.

ix)Specify the next coordinate of point 6 as 5,2 in the command line.

x)Specify the next coordinate of point 7 as 5,5 in the command line.

xi)Specify the next coordinate of point 8 as 3,5 in the command line.

xii)Click 'CLOSE' on the command line.

xiii)Select the line tool by enetring LINE command in the command tab.

xiv)Specify the next coordinate of point 9 as 6,2 in the command line.

xv)Specify the next coordinate of point 10 as 8,2 in the command line.

xvi)Specify the next coordinate of point 11 as 8,5 in the command line.

xvii)Specify the next coordinate of point 12 as 6,5 in the command line.

xviii)Click 'CLOSE' on the command line.

Result:-

• Drafting the geometry given in P-8 using Relative rectangular coordinate system:-

i)Select the line tool by enetring LINE command in the command tab.

ii)Specify the starting co ordinate of point 1 as 0,0 in the command line.

iii)Specify the next coordinate of point 2 as @10,0 in the command line.

iv)Specify the next coordinate of point 3 as @0,2 in the command line.

v)Specify the next coordinate of point 4 as @-4,0 in the command line.

vi)Specify the next coordinate of point 5 as @0,4 in the command line.

vii)Specify the next coordinate of point 6 as @3,0 in the command line.

viii)Specify the next coordinate of point 7 as @0,2 in the command line.

ix)Specify the next coordinate of point 8 as @-8,0 in the command line.

x)Specify the next coordinate of point 9 as @0,-2 in the command line.

xi)Specify the next coordinate of point 10 as @3,0 in the command line.

xii)Specify the next coordinate of point 11 as @0,-4 in the command line.

xiii)Specify the next coordinate of point 12 as @-4,0 in the command line.

xiv)Click 'CLOSE' on the command line.

Result:-

• Drafting the geometry given in P-9 using Absolute coordinate system :-

i)Select the line tool by enetring LINE command in the command tab.

ii)Specify the starting co ordinate of point 1 as 1,1 in the command line.

iii)Specify the next coordinate of point 2 as 6,1 in the command line.

iv)Specify the next coordinate of point 3 as 6,3 in the command line.

v)Specify the next coordinate of point 4 as 3,3 in the command line.

vi)Specify the next coordinate of point 5 as 3,2 in the command line.

vii)Specify the next coordinate of point 6 as 2,2 in the command line.

viii)Specify the next coordinate of point 7 as 2,4 in the command line.

ix)Specify the next coordinate of point 8 as 5,4 in the command line.

x)Specify the next coordinate of point 9 as 5,6 in the command line.

xi)Specify the next coordinate of point 10 as 1,8 in the command line.

xii)Click 'CLOSE' on the command line.

Result :-

• Drafting the geometry given in P-10 using Relative Polar coordinate system :-

i)Select the line tool by entering LINE command in the command tab.

ii)Specify the starting coordinate of point 1 as 1,1 in the command line.

iii)Specify the next coordinate of point 2 as @2<0 in the command line.

iv)Specify the next coordinate of point 3 as @3<90 in the command line.

v)Specify the next coordinate of point 4 as @3<0 in the command line.

vi)Specify the next coordinate of point 5 as @4<90 in the command line.

vii)Specify the next coordinate of point 6 as @5<180 in the command line.

viii)Click CLOSE on the command line.

ix)Select the line tool by entering LINE command in the command tab.

x)Specify the next coordinate of point 7 as 5,2 in the command line.

xi)Specify the next coordinate of point 8 as @3<0 in the command line.

xii)Specify the next coordinate of point 9 as @2<90 in the command line.

xiii)Specify the next coordinate of point 10 as @3<180 in the command line.

xiv)Click CLOSE on the command line.

Result :-

• Drafting the profile wood as shown using Direct Distance Entry Method :-

i)Select the line tool by entering LINE command in command tab.

ii)Specify the starting coordinate of point 1 as 0,0 in the command line.

iii)Enter the length of point 2 as 10 in the command line towards +ve x-axis.

iv)Enter the length of point 3 as 1 in the command line towards +ve y-axis.

v)Enter the length of point 4 as 2 in the command line towards -ve x-axis.

vi)Enter the length of point 5 as 4 in the command line towards +ve y-axis.

vii)Enter the length of point 6 as 2 in the command line towards +ve x-axis.

viii)Enter the length of point 7 as 8 in the command line at an angle of <149.03 from +ve x-direction while keeping polar tracking on.

ix)Enter the length of point 8 as 5.831 in the command line at an angle of <210 from +ve x-direction while keeping polar tracking on.

x)Enter the length of point 9 as 2 in the command line towards +ve x-axis.

xi)Enter the length of point 10 as 5 in the command line towards -ve y-axis.

xii)Enter the length of point 11 as 2 in the command line towards +ve x-axis.

xiii)Click CLOSE on the command line.

xiv)Select the circle tool by entering CIRCLE command in command tab.

xv)Specify center point of circle as 5,4.

xvi)Specify radius of circle as 2.

Result:-

• Drafting the queen post truss as shown using Relative rectangular coordinate system :-

i)Select the line tool by entering LINE command in the command tab.

ii)Specify the starting coordinate of point 1 as 1,1 in the command line.

iii)Specify the next coordinate of point 2 as @4,0 in the command line.

iv)Specify the next coordinate of point 3 as @3.536,3.536 in the command line.

v)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.

vii)Press ESC to cancel the line command.

viii)Select the line tool again by entering LINE command in command tab.

ix)Join the points 2 &4.

x)Press ESC to cancel the line command.

xi))Select the line tool again by entering LINE command in command tab.

xii)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.

xiv)Specify the next coordinate of point 8 as @0,-1 in the command line.

xv)Press ESC to cancel the line command.

xvi)Select the line tool again by entering LINE command in command tab.

xvii)Specify the coordinate of point 6 as 4.536,5 in the command line.

xviii)Specify the next coordinate of point 9 as @2.536,1 in the command line.

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 command tab.

xxii)Join Points 3&6.

xxiii)Press ESC to cancel the LINE command.

Result:-

• Drafting the Mono Pitch as shown in image using Absolute coordinate system :-

i)Select the line tool by enetring LINE command in the command tab.

ii)Specify the starting co ordinate of point 1 as 1,1 in the command line.

iii)Specify the next coordinate of point 2 as 7,1 in the command line.

iv)Specify the next coordinate of point 3 as 7,3 in the command line.

v)Click CLOSE on the command line.

vi)Select the line tool by enetring LINE command in the command tab.

vii)Specify the next coordinate of point 4 as 3,1 in the command line.

viii)Specify the next coordinate of point 5 as 3,1.667 in the command line.

ix)Specify the next coordinate of point 6 as 5,1 in the command line.

x)Specify the next coordinate of point 7 as 5,2.333 in the command line.

xi)Specify the next coordinate of point 8 as 7,1 in the command line.

xii)Press ESC to cancel the line command.

Result:-