Autodesk 057A1-05A111-1001 - AutoCAD LT 2009, Руководство по началу работы

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Chapter 7 Make Modifications
1
Start a new drawing using the drawing template file, Tutorial-mMfg.dwt .
This template is for mechanical design drawings using metric units. All distances are assumed to
be in millimeters.
2
On the status bar, click the Model button.
3
Make sure that the Polar and Osnap buttons on the status bar are turned on. The current layer
should be
Model-Front .
Create the front view
1
Create a circle with a diameter (not radius) of 50 mm at the coordinates 180,100.
NOTE The precise location of this circle is not critical in this tutorial, but it’s a good idea to make
sure that several significant features coincide with snap locations. For single-view drawings or 3D
models, it’s a good idea to have a significant feature located at the origin (0,0). This is convenient
when referencing a drawing from another drawing such as with assembly drawings.
2
Use the Center object snap to draw a circle with a diameter of 24 using the center point of the
previous circle.
The Center object snap might not be a default running object snap. Press SHIFT and right-click
to access the object snap menu.
3
Using PolarSnap to lock the angle at 0 degrees, copy the two circles to a location 125 mm to the
right.
Command: copy
Select objects:
Select the two circles and press ENTER
Specify base point or [Displacement/mOde]: <Displacement> Click the center of the circles and move
your cursor to the right
Specify second point or <use first point as displacement>: 125
Specify second point or [Exit/Undo]: Press ENTER
4
Offset the inner circle on left by 4 mm to the outside.
Command: offset
Specify offset distance or [Through/Erase/Layer]:
4
Select object to offset or [Exit/Undo]: Select the left inner circle
Specify point on side to offset or [Exit/Multiple/Undo]: Click anywhere outside the circles