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MEMB11309 AutoCAD Part 2

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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005

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Content

•

OSNAP• OTRACK

• LAYER

• BLOCK & INSERT

• Draw command: rectangle,polygon

• Edit command: trim, offset,

extend, array• Demo: Producing multi-view

drawing using AutoCAD

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Drawing aid: Object snap

• Object snap or OSNAP

– Are functions to aid the drawing process, a very useful tool

– To snap on a geometric point on an object

– Can be turned off or on by clicking OSNAP button on statusbar or press CTRL+F or F3 key

– When turned on, the cursor will jump or snap to the certainpoint on an object e.g. mid-point of a line or tangent of a circle

– Includes visual aid – AutoSnap

– Several OSNAP modes available, can activate any number at atime

Endpoint

Midpoint

Intersection

Apparent Intersection

Extension

Center

QuadrantTangent

Perpendicular

Parallel

Insert

Node

Nearest

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Object snap …cont • How to use:

– You need to have an object on drawing area

– Then you need to be in a drawing command, e.g.

CIRCLE, LINE, ARC, etc.

– Hover the mouse over the existing object,

•

Yellow marker shows up with tool tip• Indicating what type of geometric point snap

can be done

Endpoint Midpoint Intersection Example of OTRACK

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Object snap modes…cont

•

Endpoint – Snap to endpoint of the nearest entity, e.g. end of a line

• Midpoint

– Snap to the midpoint of an entity, e.g. midpoint of a straight line, or arc

• Center

– Snap to the center of entity such as circle, arc or ellipse

•

Node – Snap to the nearest point (entity)

• Quadrant

– Snap to the quarter position on the circumference of an arc, circle or ellipse

• Intersection

– Snap to the intersection of two entities

•

Tangent – Snap to the tangent of entities such as circle, arc or ellipse

• Nearest

– Snap to the nearest point on an entities

• Perpendicular

– Snap to the point perpendicular to an entity such as straight line

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Layer

–

Similar to thin transparent sheet being stackedon each other

– different part of the drawing can be drawn on

different layer

– to create and use layers:

• [pd menu] > Format >Layer • click [Icon Layer ]

• Layer properties manager

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Layers

Lock/unlock

On/off Colour

Layer name

Layer statusLayer icon

Layer list

New layer

Delete layer

Set to

current layer

Freeze/thaw

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Block and insert• Block and insert is similar to copy and paste, but with extra features,

where objects can be copied and inserted into the drawing

• Steps

– Create block [pd menu] >Block > Make

or click [Icon Block ]

– Give name, select objects to be included

– To insert/paste block into drawing

– [pd menu] > Insert > Block or

click [Icon Insert Bloc k ]

– Specify insertion point on drawing to paste

Base point

(1) Give name

(2) Base point

(3) Select objects

Block (make)

Insert block

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Block & insert ... cont

• To use/paste the block in drawing

– [pd menu] > Insert > Block.. Or [Icon

Ins ert Blo ck ]

– command:insert {enter}

Insert iconSelect block

Insertion point Scale Rotation

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Rectangle• To draw a rectangular object

– [pd menu] > Draw > Rectangle or [IconRectangle] or Command:rectangle or rectang

Rectangle shape

Rectangle – with 0.25 chamfer

Rectangle – with 0.25 fillet

2nd point1st pointRectangle icon

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Offset• To create copy of existing object at a certain distance

– Concentric circles and squares, parallel lines and

curves – [pd menu] > Modify > Offset or [Icon Offset ]

– Specify the distance

– Select the object

– Click on the side to place the object

Before After

Offset icon

Before After

Before After

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MEMB113 | D t f M h i l E i i | UNITEN | 20052

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Extend• To extend an object to another selected object

–[pd menu] > Modify > Extend or [Icon Extend ] or

– command: extend

– Steps

• Active the command

• Click an object to be the boundary object

• The the object to be extended• The object should extend to the boundary object

Boundary object

Before After Before After

Object to extend

Boundary object

Object to extend

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Demo

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