Advantages and disadvantages of AutoCAD.

Advantages of AutoCAD:
1. A mid range Software
2. User Friendly
3. Fulfills most of the professional needs of a mechanical engineer
4. Lots of Time saving (but not always)
5. Paperless Environment
6. Ease of Accuracy — e.g. joining of lines head to head is not possible manually with desired accuracy
7. Easy to edit
8. Ease of Repetition / Addition
9. Reproduction of Drawing is easy, rapid and reliable in terms of dimensional accuracy and precision.
10. 2D and 3D production of drawings is very easy.
11. Zoom Command Facility allows us to see the minute details on larger scale view.
12. A facility of Modeling and making Parts library is available.
13. Parent – Child relationship allows multiple editing in single command, means if one part is edited all other linked parts are auto edited
14. Layers option allows us to hide or show some specific details of a complex assembly drawing for clear understanding.
15. There is no limitation of a Drawing size. You can draw a 2 light years long line through proper scale stetting.
16. Auto scale option is available. Full scale drawings can be formed.
17. Geometrical relationship can make quick mathematical operations easy, e. g. you can make an inscribed circle using dimensions of the triangle or polygon etc.
18. Mass, Area, Volume, Center of Gravity can be calculated
19. Auto Dimensioning – easy, accurate and rapidly done within no time.
20. Dimension Standards are strictly followed
21. Copy, scale, Move, Stretch, rotate, Pattern commands make the task simple and easy
22. Draw Guiding through Osnap, Ortho etc.
23. Direct and Quick Drawing of Symmetrical objects. e.g circle, ellipse, polygon rectangles and triangles etc.
24. Geometrical Relationships are possible. Like two parallel lines, Tangent lines, perpendicular lines etc.
25. Fixed line thickness throughout the drawing.—– remember that, ”by default, the line thickness of auto Cad is zero”
26. Fill, Hatch, Section lines, Chamfer and fillet commands make the software a blessing as these operations are very difficult in manual drafting.
27. Adding Text – Lettering – is a big facility
28. Images can be imported and traced out for digitization of conventional diagrams and drawings.

Disadvantages of Using AutoCAD:
1. Expensive equipment is required. like Computer, Plotter, big screen monitor etc.
2. Registered software is expensive and it requires a heavy re-occurring annual fee.
3. Continuous Updating of the equipment and software is needed.
4. Electricity is mandatory for running the equipment.
5. Piracy and hacking threats are always there when you use internet for data transfer or even storage of data on a computer which is connected to internet.
6. Special computer Skills are required.
7. Proper Maintenance, supervision and administration is required for computer networking.

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Draw a line using polar co-ordinate system in AutoCAD

1. Open AutoCAD software from desktop short cut or from start menu. 2. Now type "LINE" and press ENTER KEY. Then enter 0,0 as first point of the line. 3. Then type 5<30 as second point of the line. This "<" symbol is used for the line point moves to 30 degrees from positive x-axis. 4. Now again type 2.45<270 as next point of the line. 5. After generating the line press <Esc> key from key board to exit from line command. The lines shown like below image. BACK to Day-1 Lessions CLICK HERE to get CAD HOME Work help or project help (paid)

How to draw a line using cartesian coordinate system on graph paper?

The Cartesian coordinate system in two dimensions (also called a rectangular coordinate system) is defined by an ordered pair of perpendicular lines (axes), a single unit of length for both axes and an orientation for each axis. The lines are commonly referred to as the x- and y-axes where the x-axis is horizontal and the y-axis is vertical. The point where the axes meet is taken as the origin for both, thus turning each axis into a number line. For a given point P, a line is drawn through P perpendicular to the x-axis to meet it at X and a second line is drawn through P perpendicular to the y-axis to meet it at Y. The coordinates of P are then X and Y interpreted as numbers x and y on the corresponding number lines. The coordinates are written as an ordered pair (x,y). BACK to Day-1 Lessions CLICK HERE to get CAD HOME Work help or project help (paid)

Change the layers to drawing elements in AutoCAD

1. a)Open AutoCAD application from desktop shortcut menu. b)Select new document icon from quick access toolbar and open “ansi-a” template. c)Now click on model layout tab. d)Click on “LINE” command from draw panel. e)Now move the cursor to 4 units in X axis and 2 units in Y axis and pick the line stating point. f)Now move the cursor 2 units horzontally rights side and pick another point of the line. g)Like wise above steps move the cursor or cross hair to required points shown bellow image and pick the points to get the required shape. h)Finally enter “C” to close the line. i)And draw circle by using Circle command. Now pick a point, that bellow left to the created object by usinng left mouse button and move the cursor upwards left. 2.After picking a point top right to the created object then we can see the all entities in the enclosed window appeared with blue boxes. 3.Now hold down the key from key board and select the blue colored center lines by using left mouse but...

Procedure to use zoom previous tool in AutoCAD 2015

1. a)Open AutoCAD application from desktop shortcut menu. b)Select open document icon from quick access toolbar and open “Willhome” from student files. 2.Now click on Extents option from Navigate panel. After selecting Zoom extents we can see the drawing like below. 3.Now click on window option from navigate panel. And pick a point like shown below and move the cursor right downwards. Then pick another point as zoom window opposite corner. Now we can see the zoomed area in the workspace. 4.Now click on Undo icon from quick access tool bar. 5.Now we can observe the view comes back to previous view. 6.Now continue to clicking on undo icon until the icon not activate positon.

Procedure to publish the drawing set in AutoCAD

1. a)Open AutoCAD application from desktop shortcut icon or start menu. b)Click on “Open icon” and select “welding_fx” file from database files then click on “Open” button to open the document. 2.Type “PUBLISH” command and press ENTER KEY. 3.Select “Welding_fix-Model” from sheet name list and click on “Remove” button. 4.Select “DWF” option from Publish to list. 5.Click on “Publish options” button. 6.Make sure “Multi-sheet file” as Type and “Include” as Layer information for general dwf options. 7.Click on Preview button to preview the drawing and click on close preview button. 8.Click on “Publish” button and give name as “CH15_EXERCISE5” and press ok button. 9.Click on “NO” button.

How to offesetting objects with construction lines in AutoCAD

1. a)Open AutoCAD application from desktop shortcut icon or start menu. b)Open previously saved document. 2.Click on the drop down arrow near Draw and select “XLINE” tool. 3.Select “Offset” tool. 4.AutoCAD prompts for offset distance. 5.Type “2” as offset distance and press ENTER KEY. 6.Select right side vertical line to offset. 7.Move the cursor right wards and pick a point to offset the selected element. 8.Now again AutoCAD prompts for selecting elements. 9.Pick top most horizontal line and move the cursor upwards and pick a point anywhere at upside to the selected element. 10.Press ENTER KEY to exit from “XLINE” command. 11.Now select “XLINE” from draw panel and select “Offset” tool and type “3” as offset distance and press ENTER KEY then select newly generated vertical line and move the mouse right wards and pick a point to offset the selected element in right wards. Again select “XLINE” from draw panel and select “Offset” tool from modify panel and type “3” as offset...

How to create new layers in AutoCAD

1. a) Open AutoCAD application from desktop shortcut menu. b) Click on Layer properties icon from home menu ribbon. 2. After clicking new layer icon, a new layer created with default name “Layer 1” now we can edit this name as “Dim” and press Enter Key from key board. Then the layer created with named as Dim. 3. Again press ENTER KEY to repeat the last command i.e. create a new layer. Then change layer name as “Object”. 4. 5. 6. 7. 8. 9. 10. 11. 12.Save the drawing by clicking on save icon from quick access tool bar. BACK to Day-2 Lessions

How to use Undo and Redo in AutoCAD

1. a)Open AutoCAD application from desktop shortcut menu. b)Select new document icon from quick access toolbar and open “ansi-a” template. c)Now click on model layout tab. d)Draw a line by using line command. 2. 3. 4.Now save the drawing by clicking on save icon from quick access tool bar. BACK to Day-2 Lessions

The procedure to Activate Viewport in AutoCAD

In AutoCAD we can add number of layouts depending upon the print scale of drawings. Basically model space is used to create the drawings and other layout spaces are used to see the real time output drawings. We need to set the layout spaces according to printing size of the document. 1. a) Open AutoCAD application from desktop shortcut menu. b) Select new document icon from quick access toolbar and open "ansi-a" template. c) Now double click on center of the ANSI A Tool box layout with mouse left button. After double clicking with left mouse button see the layout outline. In this layout the model space objects appeared. We can draw or scale the elements in this layout also. See the image bellow. 2. a) Whenever we move the cursor inside the dark lined layout, the cursor transforms like cross hair (looks like plus symbol shape). Whenever we move the cursor after this dark lined layout the cursor transforms its shape like arrow symbol. See the bellow two image...

How to Switch model spcae to layout space in AutoCAD 2013

In AutoCAD we can add number of layouts depending upon the print scale of drawings. Basically model space is used to create the drawings and other layout spaces are used to see the real time output drawings. We need to set the layout spaces according to printing size of the document. 1.a)Open AutoCAD application from desktop shortcut menu. b)Select new document icon from quick access toolbar and open “ansi-a” template. c)Now click on model tab that is near bottom left corner of workspace. 2. a)Now click on “ANSI A Title block” tab and observe the UCS. 3.Save the drawing by clicking on “SAVE” icon from quick access toolbar and browse the location need to save then enter document name and click on save button.

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