Drawing with Precision

Lesson 2

Now that you can draw objects……

Let’s create them to a specific size and location.

4” DIA.

5”

The UCS icon

User Coordinate System

x,y,z

How objects are graphed.

X

Y

0,0

(+,+)(-,+)

(-,-) (+,-)

(4,1)

(-2,3)

How is this communicated to CAD?

At the command line.

Variety is good!

Absolute Cartesian= x,yRelative Cartesian = @x,yRelative Polar = @x<degrees

Three methods, one result.

9” line

Start point=2,2

End point=11,2

Start point=2,2

End point=@9,0

Start point=2,2

End point=@9<0

Absolute Cartesian

Relative Cartesian

Relative Polar

Absolute Cartesian

0,0

1) 3,3

2) 11,3

3) 11,9

4) 3,9

1) 3,3

1 2

4 3

Relative Cartesian (@)

0,0

1) 3,3

2) @8,0

3) @0,6

4) @-8,0

1) @0,-6

1 2

4 3

Relative Polar (@) (<)

0,0

1) 3,3

2) @8<0

3) @6<90

4) @8<180

1) @6<270

1 2

4 3

Aim and Fire!

Direct Entry Method.

So why learn the other methods?

Apply what you learned.