memb113 09 autocad part 2. memb113 | dept. of mechanical engineering | uniten | 2005 09 autocad part...

MEMB11309 AutoCAD Part 2

MEMB113 | Dept. of Mechanical Engineering | UNITEN | 20050

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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 status bar or press

CTRL+F or F3 key– When turned on, the cursor will jump or snap to the certain point 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 a time

Endpoint

Midpoint

Intersection

Apparent IntersectionExtension

Center

QuadrantTangent

Perpendicular

ParallelInsert

Node

Nearest


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Object snap …cont

• OSNAP setting– Right-click OSNAP

button– ‘Drafting Setting’

dialog box turns up– Can be used to turn

on or off object snap modes

– Symbols indicated by each mode are shown in drawing with yellow marker


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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 stacked on 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 ColourLayer 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 Block]– 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 Insert Block]– command:insert {enter}

Insert iconSelect block

Insertion point Scale Rotation


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Block / insert• To copy & paste object into

different drawings use command wblock and minsert– Command: wblock– Command: minsert

Command: minsertEnter block name or [?]: kerusiSpecify insertion point or [Scale/X/Y/Z/Rotate/PScale/PX/PY/PZ/PRotate]:Enter X scale factor, specify opposite corner, or [Corner/XYZ] <1>:Enter Y scale factor <use X scale factor>:Specify rotation angle <0>: 90Enter number of rows (---) <1>: 2Enter number of columns (|||) <1>: 1Enter distance between rows or specify unit cell (---): 40

Base point

Select object

Specify filenameLocation on disk


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Rectangle• To draw a rectangular object

– [pd menu] > Draw > Rectangle or [Icon Rectangle] 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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Polygon• To draw many- & equal- side closed object e.g hexagon,

pentagon etc.– [pd menu] > Draw > Polygon or [Icon Polygon] or

Command: polygon

Center - Inscribed

Center - Circumscribed Edge1st point

2nd point

1st point

2nd point

1st point

2nd point

Examples of polygon drawn

Polygon 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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Trim

• To remove a certain part of an object based on other object(s)– [pd menu] > Modify > Trim or [Icon Trim]

Cutting edge

Part to be removed

Before After

Cutting edgeBefore After

Part to be removed

Cutting edge

Part to be removedBefore After

Cutting edge

Part to be removed

Cutting edge

Part to be removed

Before After

Before After


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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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Array

• Creates multiple copies with a certain pattern and distance

• 2 types: rectangular and polar

Rectangular array

– [pd menu] > Modify > Array…– [icon Array]– Array Window will be displayed

AfterBefore

Array icon


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Array …cont

– Click Select object button– Click on object(s) or entity

to be copied– Press enter– Change the value of rows

and columns accordingly– Type in offset distance

and direction

Row offset =1Column offset =1.5Angle of array = -30

Select object(s) buttonRectangular array

No. of rowsNo. of columns

Distance between objects

Angle of array

Arrangementpreview

Angle of array


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Array …cont

– Click on Polar Array– Select object(s)– Specify center point– Select method

• No.of item & angle to fill• No.of item & angle

between item• Angle to fill & angle

between item– Specify the required value– Click on ‘rotate item as

copied’ check box if required

Polar array

– [pd menu] > Modify > Array…– [icon Array]


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Array …cont

Before After

No. of item = 8Angle to fill = 360Rotate = No

Before After

No. of item = 6Angle to fill = -180Rotate = No

Before After

No. of item = 8Angle to fill = 360Rotate = Yes


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Assignment: How to draw this object in AutoCAD?


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R5

R20

12

10

12

8

2018

60

18

24

9

R99

Example – produce multi-view drawing


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Example – produce multi-view drawing

memb113 09 autocad part 2. memb113 | dept. of mechanical engineering | uniten | 2005 09 autocad part...

Documents

mechanical engineering

drawing command

drawing aid

object snapobject snap

object snap modessymbols

object snap conthow

drawing pd menu

memb11309 autocad