LAB REPORT # 10

ENGG DRAWING AND CAD

ISOMETRIC PROJECTION

AutoCAD has an isometric drawing mode that lets you drawing 3D-looking objects in 2D just like when you draw 3D objects on a flat sheet of paper. This means that even AutoCAD LT can draw 3D representations.

Isometric planes:
Notice below, that when drafting in an Isometric plane, you are still drawing in the flat 2D plane. You can see this by looking at your view as it is shown in the view cube.

The picture below shows the flat Iso-drawing when the view is rotated to a 3D view as shown by the rotation of the viewcube:

The Isometric planes are basically increments of 30 degrees and shown below:

To turn on the Isometric mode, Right click on the “SNAP” button that is in the Drafting Settings buttons.

Select “Isometric Snap” from the dialog box and then click OK

Once the dialog box closes you will notice that your drawing cursor (cross hairs) will look funny. This is showing you that your cursor is in an Isometric mode.

To draft so that your lines are aligned with this Isometric mode make sure that ORTHO is turned on.

To change which Isometric mode you are in, use the F5 function button:

Shown below is an example of drawing a cube in Isometric mode:

Isometrics are fun but they are a little difficult when it comes to rounded objects and rounded edges. When you need to create a circle, use an ellipse. And to be more specific, use the “Axis, End” ellipse tool. Using this tool while in an active isometric mode will show and extra sub-option in the command line. the sub-option that you need to select is the “Isocirlce” option. Drawing curved edges and objects while in Isometric mode will take some practice, so be patient and have fun.

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