Creation of geometries by Coordinate system methods using AutoCad

Aim:To create different geometric shape given above by coordinate system using line and circle tool.

Introduction:

Coordinate system:It is a system allow to define the placement of points to determine the position of point/geometric shapes.This system is mainly of two types,they are:

1.Absolute coordinate system: It is a cartesian form where points are enetered at some distance in x and y axis with respect to the origin,in the form of x,y.ex- (7,4) or (1,1).

2.Relative coordinate system: In this the refernce point is the previous point in the drawing, not related to origin(0,0).This are of two types:

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.
2. Relative polar coordinate: Polar coordinates specify one radial distance and one angle of particular point w.r to previous point.In command line it is entered as @diatance<angle,example @5<180 degree.

Direct distance entry method: It is another easiest method used for drawing in autocaed.In this methos user can draw any object just by pointing cursor in reqired directio and entry the distance value.

Line tool: Line command can be searched by entering L in command or from draw panel in ribbon.Line is draw using several random point.It is used to draw required shapes with helpof coordinate system.

Circle tool:Circle command can be searched in command line by entering C or from draw panel in ribbon.It can be drawn with 5 different option:

• Circle and radius:First step is to enter the center coordinates/or select the centre and enter the radius value.
• Circle and diameter:First step to enter the center coordinates/or select the centre and enter the diamter value which is double of radius value.
• Circle with 2 points:Circle is draw by selecting point points.
• Circle with 3 points:Circle is draw by selecting three points.
• Tan,tan and radius:Selecting two tangent points and entering required radius for which circle fits in there.
• Tan,tan and tan:Selecting three tagent points on the lines.

Procedure:

Creation of drawing sheet:

• Go to start menu,cick on AUTOCAD 2022.
• Click on start drawing.
• From command line,enter STARTUP.
• Enter a new value of startup:1
• Go to application menu,select new
• Select impherial system from start from scartch option.
• From advance setting option,select decimal option with required precision from units.
• Set angle unit as decimal degree with precision and measurement with east with anitclockwise as positive direction.
• Enter LIMITS in command line to set area limit as 0,0 and 100,100.

1.Creating the geometry given in P-1:

Using absolute coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate point 1 as 2,1 in command line.
3. specify the next coordinate point 2 as 8,1 in command line.
4. specify the next coordinate point 3 as 8,2 in command line.
5. specify the next coordinate point 4 as 3,2 in command line.
6. specify the next coordinate point 5 as 3,6 in command line.
7. specify the next coordinate point 6 as 8,6 in command line.
8. specify the next coordinate point 7 as 8,7 in command line.
9. specify the next coordinate point 8 as 2,7 in command line.
10. click close on command line.

Result:

2.Creating the geometry of P-2:

using relative rectangular coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate point 1 as 2,1 in command line.
3. specify the next coordinate point 2 as @3,0 in command line.
4. specify the next coordinate point 3 as @0,4 in command line.
5. specify the next coordinate point 4 as @1,0 in command line.
6. specify the next coordinate point 5 as @0,-4 in command line.
7. specify the next coordinate point 6 as @3,0 in command line.
8. specify the next coordinate point 7 as @-2,7 in command line.
9. specify the next coordinate point 8 as @-3,0 in command line.
10. click close on command line.

Result:

3.Creating the geometry in P-4 using absolute coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 2,1 in the command line.
3. specify the next coordinate of point 2 as 3,1 in the command line.
4. specify the next coordinate of point 3 as 3,5 in the command line.
5. specify the next coordinate of point 4 as 5,3 in the command line.
6. specify the next coordinate of point 5 as 7,5 in the command line.
7. specify the next coordinate of point 6 as 7.1 in the command line.
8. specify the next coordinate of point 7 as 8,1 in the command line.
9. specify the next coordinate of paint 8 as 8,8 in the command line.
10. specify the next coordinate of point 9 as 7.8 in the command line.
11. specily the next coordinate of point 10 as 5,5 in the command line.
12. specify the next coordinate of point 11 as 3.8 in the command line.
13. specify the next coordinate of point 12 as 2,8 in the command line.
14. click close on command line.

Result:

4.Creating the geometry of P-5 using direct distance distance entry method:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 2,1 in the command line.
3. enter the length of point 2 as 1 in the command line +ve x-axis.
4. enter the length of point 3 as 7 in the command line +ve y-axis.
5. enter the length of point 4 as 5 in the command line +ve x-axis.
6. enter the length of point 5 as 7 in the command line -ve y-axis.
7. enter the length of point 6 as 3 in the command line -ve x-axis.
8. enter the length of point 7 as 1 in the command line -ve y-axis.
9. enter the length of point 8 as 4 in the command line +ve x-axis.
10. enter the length of point 9 as 8 in the command line +ve y-axis.
11. enter the length of point 10 as 7 in the command line -ve x-axis.
12. click close on command line.

Result:

5.Creating the geometry of P-7 using Absolute coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 2,1 in the command line.
3. specify the next coordinate of point 2 as 10,1 in the command line.
4. specify the next coordinate of point 3 as 10,7 in the command line.
5. specify the next coordinate of point 4 as 2,7 in the command line.
6. click close on command line.
7. select the line tool again from command bar by enetring L.
8. specify the next coordinate of point 5 as 3,2 in the command line.
9. specify the next coordinate of point 6 as 5,2 in the command line.
10. specify the next coordinate of point 7 as 5,5 in the command line.
11. specify the next coordinate of point 8 as 3,5 in the command line.
12. click close on command line.
13. select the line tool again from command bar by enetring L.
14. specify the next coordinate of point 9 as 6,2 in the command line.
15. specify the next coordinate of point 10 as 8,2 in the command line.
16. specify the next coordinate of point 11 as 8,5 in the command line.
17. specify the next coordinate of point 12 as 6,5 in the command line.
18. click close on command line.

Result:

6.Creating the geometry of P-8 using direct distance distance entry method:

1. select the line tool from command bar by enetring L.
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 +ve x-axis.
4. enter the length of point 3 as 2 in the command line +ve Y-axis.
5. enter the length of point 4 as 4 in the command line -ve x-axis.
6. enter the length of point 5 as 4 in the command line +ve Y-axis.
7. enter the length of point 6 as 3 in the command line +ve x-axis.
8. enter the length of point 7 as 2 in the command line +ve Y-axis.
9. enter the length of point 8 as 8 in the command line -ve x-axis.
10. enter the length of point 9 as 2 in the command line -ve Y-axis.
11. enter the length of point 10 as 3 in the command line +ve x-axis.
12. enter the length of point 11 as 4 in the command line -ve Y-axis.
13. enter the length of point 12 as 4 in the command line -ve x-axis.
14. click close on command line.

Result:

7.Creating the geometry of P-9 using absolute coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 1,1 in the command line.
3. specify the next coordinate point 2 as 6,1 in command line.
4. specify the next coordinate point 3 as 6,3 in command line.
5. specify the next coordinate point 4 as 3,3 in command line.
6. specify the next coordinate point 5 as 3,2 in command line.
7. specify the next coordinate point 6 as 2,2 in command line.
8. specify the next coordinate point 7 as 2,4 in command line.
9. specify the next coordinate point 8 as 5,4 in command line.
10. specify the next coordinate point 9 as 5,6 in command line.
11. specify the next coordinate point 10 as 1,8 in command line.
12. click close on command line.

Result:

8.Creating the geometry of P-10 using absolute coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 1,1 in the command line.
3. specify the next coordinate point 2 as 3,1 in command line.
4. specify the next coordinate point 3 as 3,4 in command line.
5. specify the next coordinate point 4 as 6,4 in command line.
6. specify the next coordinate point 5 as 6,8 in command line.
7. specify the next coordinate point 6 as 1,8 in command line.
8. click close on command line.
9. select the line tool again from command bar by enetring L.
10. specify the next coordinate point 7 as 2,5 in command line.
11. specify the next coordinate point 8 as 5,5 in command line.
12. specify the next coordinate point 9 as 5,7 in command line.
13. click close on command line.

Result:

9.Creating the geometry of Profile wood using relative polar coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 0,0 in the command line.
3. specify the next coordinate point 2 as @10<0 in command line.
4. specify the next coordinate point 3 as @1<90 in command line.
5. specify the next coordinate point 4 as @2<180 in command line.
6. specify the next coordinate point 5 as @4<90 in command line.
7. specify the next coordinate point 6 as @2<0 in command line.
8. specify the next coordinate point 7 as @1<90 in command line.
9. specify the next coordinate point 8 as @5.813<140.036 in command line.
10. specify the next coordinate point 9 as @5.813<210.964 in command line.
11. specify the next coordinate point 10 as @2<0 in command line.
12. specify the next coordinate point 11 as @5<270 in command line.
13. specify the next coordinate point 12 as @2<180 in command line.
14. click close on command line.
15. select the circle and radius tool from draw panel.
16. specify the origin coordinate 13 as 5,4 in command line.
17. enter the radius of the circle as 2 units in command line.

10.Creating the geometry of queen post truss using relative polar coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 1,1 in the command line.
3. specify the starting coordinate of point 2 as @4<90 in the command line.
4. specify the starting coordinate of point 3 as @5<45 in the command line.
5. specify the starting coordinate of point 4 as @5<315 in the command line.
6. specify the starting coordinate of point 5 as @4<270 in the command line.
7. press Esc to cancel the line command.
8. press ENTER to repeat the line command.
9. specify the coordinate of point 6 as 1,5 in the command line.
10. press Esc to cancel the line command.
11. press ENTER to repeat the line command.
12. specify the coordinate of point 7 as 2,5 in the command line.
13. specify the starting coordinate of point 8 as @1<90 in the command line.
14. specify the starting coordinate of point 9 as @2<215 in the command line.
15. specify the starting coordinate of point 10 as @2<45 in the command line.
16. specify the starting coordinate of point 11 as @1<270 in the command line.
17. press Esc to cancel the line command.

Result:

11.Creating the geometry of mono pitch using absolute coordinate system:

1. select the line tool from command bar by enetring L.
2. specify the starting coordinate of point 1 as 1,1 in the command line.
3. specify the next coordinate point 2 as 7,1 in command line.
4. specify the next coordinate point 3 as 7,3 in command line.
5. click close on command line.
6. press ENTER to repeat the line command.
7. specify the next coordinate point 4 as 3,1 in command line.
8. specify the next coordinate point 5 as 3,0.667 in command line.
9. specify the next coordinate point 6 as 5,1 in command line.
10. specify the next coordinate point 7 as 5,1.333 in command line.
11. specify the next coordinate point 8 as 7,1 in command line.
12. press Esc to cancel the line command.

Result: