Optical axis is a part which is very long and the shape of which is same along the direction of length,so it is allowed to draw as a shorten shape which is broken. The dimesions in the draw must be the same as the actual length of the part. The example follows the method mentioned above, shown in Figure 1.1.1. The details of drawing are introduced in the following steps.
Task 1. Adopt the template file
Adopt the template file in the disk which belongs to the book. Choose the pull-down menu → ,select template in the dialog box and then find the file ,
D\AutoCAD2009.2\system_file\part_temp_A2.dwg, and then single click the button.
Task 2. Creat front view
Step 1.Draw the cEnter line shown in Figure 1.1.2
(1) Swich layer. In the ‘Layer Manager’ toolbar, choose the ‘cEnter line’ layer .
(2) Choose the pull-down menu →, draw the horizontal cEnter-line shown in the figuer 1.1.2 as 415 mm length.
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