Engineering Drawing Lab Report: Construction & Editing at Comsats Univ. Islamabad, Study notes of Engineering Drawing and Graphics

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COMSATS UNIVERSITY ISLAMABAD,

ISLAMABAD CAMPUS

Lab Report # 01

Course:

Engineering Drawing

Submitted to:

Ma’am Kiran Nadeem

Submitted by:

Syed Armaghan Tirmazi CIIT/FA21-BEE-176/ISB

Section:

BEE-1D

Basic Construction and Editing

Part 1: Basic 2-D Construction In this exercise basic construction and edit commands will be leardned including: creating lines, circles, arcs, and basic dimensioning to create the drawing shown below:

1. Start with a new AutoCAD drawing by selecting the new command icon in the Standard toolbar. The Select Template dialog box will appear.
2. In the Select Template manager, left-mouse-click on the triangular button to the right of the Open button, and select Open with no Template – Imperial. This sets the default units to inches.
3. Select the Line command icon in the Draw toolbar.
4. In the command prompt area near the bottom of the screen, AutoCAD prompts you to identify the starting point of the line. _Command: line Specify the first point : 0,0 [ENTER] (Type the coordinates 0,0 and press the [ENTER] key).

properties can also be changed. In the pull-down menus, select: Dimension style.

19. The Dimension Style Manager dialog box appears on the screen.
20. Click on Modify to bring up the Modify Dimension Style dialog box.
21. Click on the Primary Units tab.
22. Select Precision 0.0 to set the default accuracy of the dimensions to be displayed to one decimal place. All dimensions added from this point on will be displayed with this accuracy.
23. Click on the OK button to accept the settings and close the dialog box
24. Click on the CLOSE buttonn to close the Dimension Style Manager dialog box.
25. Be sure the Dimension toolbar is displayed. If the Dimension toolbar is not displayed, move the cursor to the Standard toolbar area and right-click an empty area in between two icons to display a list of toolbar menu groups. Select Dimension with the left mouse button to display the Dimension toolbar. You can also display the Dimension toolbar activating the Customize dialog box by selecting [View] => [Toolbars] in the pull-down menus.
26. From the Dimension toolbar select Linear Dimension.
27. Pick the lower left corner of the drawing when prompted to specify the first extension line origin.
28. Pick the lower right corner of the drawing when prompted to specify the second line origin.
29. Pick a point that is about 1.0 inch below the bottom horizontal line to place the dimension text.
30. Repeat the Linear Dimension command to add the remaining linear dimensions.
31. To add the diameter dimensions, from the Dimension toolbar select Diameter Dimension. Dimension the three circles as shown in the figure on the first page of this handout.
32. In the pull-down menus, select: File => [Save As]
33. Save the drawing. The file will be saved as an AutoCAD drawing with a default file extension of “.dwg”.

Part 2: Drafting Aids In this exercise, drafting aids such as grid, snap, and object snaps will be used to create the drawing shown below.

1. In the pull-down menus, select File => [New]
2. Left-click on Open when the Select Template dialog box appears.
3. In the dialog box, select Open with no Template – Imperial to set the default units to inches.
4. Left click the GRID button in the Status Bar to turn ON the GRID option. This creates a pattern of dots on the screen. The default spacing between grid points is 0.5 inches.
5. Left-click the SNAP button in the Status Bar to turn ON the GRID option. The SNAP option controls the cursor movements to specified intervals. The default spacing between snap points is 0.5 inches.
6. Create the two 5-inch squares using the RECTANGLE command button in the Draw toolbar. Use the cursor to locate the opposite corners of each rectangle while watching the coordinates display at the bottom of the screen. Make the second rectangle about 1.5 inches to the right of the first one.
7. Right-click the OSNAP button in the Status Bar. Left-click on Settings to display the Drafting Settings dialog box.

Critical Analysis

Part 1: Basic 2-D Construction For the 1 st part, the commands are used are given below:

1. For drawing  Line command  Circle command 2. For dimension  Linear command  Aligned command  Radius command  Dimension style Part 2: Drafting Aids For the 2 nd part, the commands which are used as follows: 1. For Drawing  Rectangle command  Circle command  Line command 2. For Dimension  Linear command  Aligned command  Dimension style

3. Object Snap mode  Endpoint  Midpoint  Center  Intersection  Extension