1. MEMB113 09 AutoCAD Part 2

2. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Content OSNAP OTRACK LAYER BLOCK & INSERT Draw command: rectangle, polygon Edit command: trim, offset, extend, array Demo: Producing multi-view drawing using AutoCAD

3. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 Intersection Extension Center Quadrant Tangent Perpendicular Parallel Insert Node Nearest

4. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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

5. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 EndpointMidpointIntersectionExample of OTRACK

6. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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

7. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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

8. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Layers Lock/unlock On/off Colour Layer name Layer statusLayer icon Layer list New layer Delete layer Set to current layer Freeze/thaw

9. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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

10. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Block & insert... cont To use/paste the block in drawing –[pd menu] > Insert > Block.. Or [Icon Insert Block] –command:insert {enter} Insert icon Select block Insertion pointScaleRotation

11. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Block / insert To copy & paste object into different drawings use command wblock and minsert –Command: wblock –Command: minsert Command: minsert Enter block name or [?]: kerusi Specify insertion point or [Scale/X/Y/Z/Rotate/PScale/PX/PY/PZ/PRota te]: Enter X scale factor, specify opposite corner, or [Corner/XYZ] : Enter Y scale factor : Specify rotation angle : 90 Enter number of rows (---) : 2 Enter number of columns (|||) : 1 Enter distance between rows or specify unit cell (---): 40 Base point Select object Specify filename Location on disk

12. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 point Rectangle icon

13. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 Edge 1st point 2nd point 1st point 2nd point 1st point 2nd point Examples of polygon drawn Polygon icon

14. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 BeforeAfter Offset icon BeforeAfter BeforeAfter

15. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 BeforeAfter Cutting edge BeforeAfter Part to be removed Cutting edge Part to be removed BeforeAfter Cutting edge Part to be removed Cutting edge Part to be removed BeforeAfter BeforeAfter

16. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 BeforeAfterBeforeAfter Object to extend Boundary object Object to extend

17. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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

18. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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 =1 Column offset =1.5 Angle of array = -30 Select object(s) button Rectangular array No. of rows No. of columns Distance between objects Angle of array Arrangement preview Angle of array

19. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 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]

20. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Array …cont BeforeAfter No. of item = 8 Angle to fill = 360 Rotate = No BeforeAfter No. of item = 6 Angle to fill = -180 Rotate = No Before After No. of item = 8 Angle to fill = 360 Rotate = Yes

21. Demo

22. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Assignment: How to draw this object in AutoCAD?

23. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 R5 R20 12 10 12 8 20 18 60 18 24 9 R9 9 Example – produce multi-view drawing

24. MEMB113 | Dept. of Mechanical Engineering | UNITEN | 2005 09 AutoCAD Part 2 Example – produce multi-view drawing