Creation of geometries by Coordinate system methods using AutoCad
Que :- Create the geometries from P1 to P2 using all the coordinates system methods. You need to use the Line
tool to create the geometries. Where required you need to use the circle tool.
Please read the drawings and find out the missing dimensions before working on the sketches.
Note: Use the Imperial Template and the Decimal Units to draft the features. Dimensions are there for
references.
Ans :-
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 coordinate systems. They are :
1. Absolute coordinate systems
2. Relative coordinate systems
- a) Relative rectangular coordinates
- b) Relative polar coordinates
3. Direct distance entry
1. Absolute Coordinate System: In this system, all points are established at some distance in the x&yaxis (sometimes z-axis) from a common origin (usually 0,0).
2. 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
a) 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.
b) Relative polar coordinates: This system specifies the distance (length) and angle of a particular point with respect to its previous point. In the Relative polar coordinate system, points are
established by typing @distance
3. Direct distance entry method: It is another popular method used for drawing different shapes/geometries in AutoCAD. The 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