ISOMETRIC IN AUTOCADISOMETRIC IN AUTOCAD

Outcomes of today’s lectureOutcomes of today’s lecture

Able to explain in producing Able to explain in producing Isometric drawing in AutoCADIsometric drawing in AutoCAD

Setting up isometric grid/snapSetting up isometric grid/snap

The grid/snap style should be changed The grid/snap style should be changed to isometric snapto isometric snap Right click on grid button on status bar, Right click on grid button on status bar,

choose ‘Settings…’choose ‘Settings…’ Drafting setting window displaying Snap and Drafting setting window displaying Snap and

Grid tab is displayedGrid tab is displayed

MEMB113 OBE | Dept. of Mechanical Engineering | UNITEN | 20060

8 A

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Setting up isometric grid/snapSetting up isometric grid/snap

Rectangular

Isometric

Changing isoplaneChanging isoplane• Changing the isoplane – left, top, right

– Cycle by pressing CTRL+E or F5 or– Command: isoplane {enter}

Right Top Left

Drawing lines, circles and arcDrawing lines, circles and arc Isometric lines and non-isometric lines can be drawn using line or polyline Isometric lines and non-isometric lines can be drawn using line or polyline

commandcommand Isometric circle can be drawn using ellipse commandIsometric circle can be drawn using ellipse command

Draw ellipse > isocircleDraw ellipse > isocircle Isometric quarter circle and semi circle can be drawn using ellipse arc commandIsometric quarter circle and semi circle can be drawn using ellipse arc command

Draw ellipse arc > isocircle Draw ellipse arc > isocircle

Creating round cornerCreating round cornerBefore After

Draw ellipse arc

Draw anotherellipse arc

Draw straightline frommidpoint oftop arc to midpoint of bottom arc

Trim Trim Trim

DimensioningDimensioning

Use Use aligned dimensionaligned dimension for linear dimensioning for linear dimensioning Use Use quick leaderquick leader for isocircle for isocircle

Aligned dimension Quick leader

To make dimension aligned with isometric axes, follow few steps as:

- Type DIMEDIT- Type O for Oblique- Select the dimension to be aligned, then Enter

- Specify the obliquing angle

For example, using the object above, for clockwise alignment suchas 90, type 30 for the angle, whereas for 100, type -30 for the anglesince anti-clockwise alignment.

Dimensioning for Dimensioning for IsocircleIsocircleSelect Quick leader icon

Select the circle, then extend the leader line to appropriate direction, click, then make short extension in horizontal direction, click,then type corresponding value (example: R20) for the dimension.

Other useful tipsOther useful tips

Use COPY command with polar relative Use COPY command with polar relative coordinate system or OSNAP.coordinate system or OSNAP.

Do not use OFFSET command.Do not use OFFSET command. Set up LAYER before drawing.Set up LAYER before drawing. Use construction line as a guide Use construction line as a guide

(recommended to use different colour)(recommended to use different colour)

ConclusionsConclusions

What has been covered today:What has been covered today:

Producing isometric drawing using AutoCADProducing isometric drawing using AutoCAD

MEMB113 OBE | Dept. of Mechanical Engineering | UNITEN | 20060

8 A

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What is next?What is next?

You will complete the Tutorial on creating You will complete the Tutorial on creating Isometrics.Isometrics.

After completing the Tutorial and turning in After completing the Tutorial and turning in your print. You will revisit Packet 2 and 3. your print. You will revisit Packet 2 and 3. You will complete 6 total Isometrics for the You will complete 6 total Isometrics for the two packets (your choice on which 6). two packets (your choice on which 6). Each is worth 10 points. Dimensions Each is worth 10 points. Dimensions MUST be included. MUST be included.