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Beginning AutoCAD 2017. Cheryl R. Shrock
Читать онлайн.Название Beginning AutoCAD 2017
Год выпуска 0
isbn 9780831194062
Автор произведения Cheryl R. Shrock
Жанр Программы
Издательство Ingram
EXERCISE 3D
INSTRUCTIONS:
1. Start a NEW file using either the inch-helper.dwt or the metric-helper.dwt
2. Important: Draw the objects below using the following Layers:
Roof, Wall, Window, Door and Plants
3. You can change Snap and Grid settings to whatever you like.
4. You decide when to turn Ortho and Snap ON or OFF.
5. All objects must be placed accurately. All lines must intersect exactly.
6. Save the drawing as: Ex-3D
EXERCISE 3E
INSTRUCTIONS:
1. Open Ex-3D. (Use OPEN not NEW to open an existing drawing)
2. Make layer Object “current”
(I am having you do that because you can’t Freeze or Lock a layer that is current and I want to make sure that none of the layers that you used in the drawing is current.)
3. Freeze the following layers: Window and Plants (Do not use erase)
4. Lock layer Roof
5. Try to erase any of the roof lines.
You can’t because the Roof layer is Locked.
6. Save the drawing as: Ex-3E
EXERCISE 3F
INSTRUCTIONS:
1. Start a new file using template: acad.dwt (Inch) or acadiso.dwt (Metric).
2. Load Linetypes Zigzag, Gas_Line and Dashed (Refer to page 3-16).
3. Create 3 layers named Fence, Gas and Invisible. (Refer to page 3-15)
Assign the Name, Color, Linetype and Lineweight as shown above.
Note: Lineweights for metric users are: Zigzag = 0.5 mm, Gas-Line = 1.2 mm, Dashed = 0.25 mm.
4. Draw the LINES below using the new layers:
A. Select the layer
B. Select the Line command
C. Draw the lines approximately 5 inches [127 mm] long.
D. Ortho (F8) ON.
5. Save the drawing as: Ex-3F
EXERCISE 3G
INSTRUCTIONS:
1. Open Ex-3B
2. Open the Layer Properties Manager (Refer to page 3-10).
3. Change Transparency of the Object Line layer to 70 (Refer to page 3-14).
4. Select the Transparency status button to show or hide Transparency.
5. Save the drawing as: Ex-3G
Notes:
LEARNING OBJECTIVES
After completing this lesson, you will be able to:
1. Understand Object Snap.
2. Use Running Object Snap.
3. Use the Zoom options to view the drawing.
4. Change the Drawing Limits.
5. Select the Units of Measurement and Precision.
In Lesson 3 you learned about Increment Snap. Increment Snap enables the cursor to move in an incremental movement. So you could say your cursor is “snapping to increments” preset by you.
Now you will learn about Object Snap. If Increment Snap snaps to increments, what do you think Object Snap snaps to? That’s right; “objects”. Object snap enables you to snap to “objects” in very specific and accurate locations on the objects.
For example, the endpoint of a line or the center of a circle.
How to select from the Object Snap Menu
1. You must select a command, such as LINE, before you can select Object Snap.
2. While holding down the shift key, press the right mouse button The menu shown below should appear.
3. Highlight and press the left mouse button to select an Object Snap.
The following object snaps will be discussed in this Lesson:
Endpoint, Midpoint, Intersection, Center, Geometric Center, Quadrant, Tangent and Perpendicular. Refer to their descriptions on the next page.
The remaining object snaps will be discussed in future lessons.
Object Snap Definitions
Object snap is used when AutoCAD prompts you to place an object. Object snap allows you to place objects very accurately.
A step-by-step example of “How to use object snap” is shown on the next page.
Note: You may type the 3 bold letters shown rather than select from the menu.
| Snaps to the closest endpoint of a Line, Arc or polygon segment. Place the cursor on the object close to the end and the cursor will snap like a magnet to the end of the line. | |
| Snaps to the middle of a
|