NE 1102
Engineering Drawing Laboratory
Experiment: AC-04
Drawing of a sealing plate using AutoCAD (without using mirror)
Procedure:
1) Open AutoCAD and save a file as drawing04.dwg.
2) Set running object snaps for intersection, center, and endpoint. Make sure both Osnap and Ortho are on.
3) Start the Line command and type 2,3↵ .
Move the mouse horizontally to the right and type 7↵ .
Press Enter to end the Line command.
4) Start the Line command again and type 5-1/2,1-5/8↵ .
Move the mouse up in the 90-degree direction and type 2-3/4↵ .
Press Enter to end the Line command.
5) Start Circle command and at the Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: prompt, pick the intersection of the two lines.
At the Specify radius of circle or [Diameter]: prompt, type 11/16↵ .
6) Start Circle command again and at the Specify center point for circle or [3P/2P/Ttr (tan tan radius)]: prompt, pick the center of the previous circle.
At the Specify radius of circle or [Diameter]: prompt, type 1↵ .
7) Start the Circle command.
From the Object Snap shortcut menu, choose From.
For the Base point, pick center of either of the first two circles.
Md. Zahidul Islam, Lecturer, Dept. of Electrical and Electronic Engineering, University of Dhaka Email: [email protected] ; URL: www.sites.com/site/mzislamraju
At the Specify radius of circle or [Diameter]: prompt, type 3/8↵ .
8) Start the Circle command again and choose the From object snap. For the Base point, pick center of either of the first two circles. At the <offset>: prompt, type @1-15/16,0↵ .
At the Specify radius of circle or [Diameter]: prompt, type 3/8↵ .
9) Choose Arc from the Draw toolbar.
Specify Start point of arc or [Center]: Choose the From object snap.
Base point: Pick the center of the leftmost circle.
<offset>: @-5/8,0↵ .
Specify second point of arc or [Center/End]: Choose Center.
Specify center point of arc: Pick the center of the leftmost circle.
Specify end point of arc or [Angle/chord Length]: Choose Angle.
Specify included angle: 67↵ .
10) Start the Line command.
At the Specify first point: prompt, press Enter to continue the line in the same direction as the end of the arc.
At the Length of line: prompt, type 1-13/16↵ .
Press Enter to end the Line command.
11) Choose Arc from the Draw toolbar.
Specify Start point of arc or [Center]: Pick the end point of the last line.
Specify second point of arc or [Center/End]: Choose Center.
Specify center point of arc: Pick center of the one of large central circles.
Specify end point of arc or [Angle/chord Length]: Pick the lower end point of the vertical construction line.
12) Repeat Arc command.
Specify Start point of arc or [Center]: Choose Center.
Specify center point of arc: Pick center of the one of the large central circles.
Specify start point of arc: Pick the end point of the last arc.
Specify end point of arc or [Angle/chord Length]: Choose Angle.
Md. Zahidul Islam, Lecturer, Dept. of Electrical and Electronic Engineering, University of Dhaka Email: [email protected] ; URL: www.sites.com/site/mzislamraju
13) Start the Line command. Specify first point:↵ . Length of line: 1-13/16↵ .
Press Enter to end the Line command.
14) Start the Arc command.
Specify Start point of arc or [Center]: Pick the end point of the last line.
Specify second point of arc or [Center/End]: Choose End.
Specify end point of arc: Choose the From object snap.
Base point: Pick the center of the rightmost circle.
<offset>: @5/8,0↵ .
Specify center point of arc or [Angle/Direction/Radius]: Choose Radius.
Specify radius of arc: 5/8↵ .
15) Repeat Arc command.
Specify Start point of arc or [Center]: Choose the From object snap.
Base point: Pick the center of the leftmost circle.
<offset>: @-5/8,0↵ .
Specify second point of arc or [Center/End]: Choose Center.
Specify center point of arc: Pick the center of the leftmost circle.
Specify end point of arc or [Angle/chord Length]: Choose Angle.
Specify included angle: -67↵ .
16) Start the Line command.
At the Specify first point: prompt, press Enter to continue the line in the same direction as the end of the last arc.
At the Length of line: prompt, type 1-13/16↵ .
Press Enter to end the Line command.
17) Choose Arc from the Draw toolbar.
Md. Zahidul Islam, Lecturer, Dept. of Electrical and Electronic Engineering, University of Dhaka Email: [email protected] ; URL: www.sites.com/site/mzislamraju
Specify second point of arc or [Center/End]: Choose Center.
Specify center point of arc: Pick center of the one of large central circles.
Specify end point of arc or [Angle/chord Length]: Pick the end point of the last line.
18) Repeat Arc command.
Specify Start point of arc or [Center]: Choose Center.
Specify center point of arc: Pick center of the one of the large central circles.
Specify start point of arc: Pick the end point of the last arc.
Specify end point of arc or [Angle/chord Length]: Choose Angle.
Specify included angle: -23↵ .
19) Start the Line command.
Specify first point: press Enter to continue the line in the same direction as the end of the arc.
Length of line: type 1-13/16↵ .
Press Enter to end Line command.
20) Start the Arc command again.
Specify Start point of arc or [Center]: Choose From object snap.
Base point: Pick the center of the rightmost circle.
<offset>: @5/8,0↵ .
Specify second point of arc or [Center/End]: Choose Center.
Specify center point of arc: Pick the center of the rightmost circle.
Specify end point of arc or [Angle/chord Length]: Choose Angle.
Specify included angle: 67↵ .
