147578204-autocad-2 copy
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005
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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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