Autocad 2d Module 05 PDF

8/14/2019 Autocad 2d Module 05 PDF

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Learning Outcomes:

AutoCAD Self-paced Learning Modules

AutoCAD 2DModule 5Layers

When you have completed this module, you wil l be able to:

1. Describe AutoCAD's layering system and apply the LAYER command to create, toggle

on/off, thaw/freeze, lock/unlock, select color, and set the current layer for the activedrawing.

Geometry Lesson

Points and Lines

A pointis defined as a single XY coordinate. It does not have width, height or depth.

A line is the shortest distance between two XY locations. Lines can be horizontal, verticalor

inclined. Lines that are the same distance apart are called parallellines. Perpendicularlines are at right angles to each other or 90 degrees apart. See Figure 5-1.

Figure 5-1

Points and Lines

Layers The CAD Guys Ltd. Copyright 1993 - 2007 Module 5


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Layers

AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-04-11

AutoCAD's layering system is one of the most

important features to the AutoCAD Operator.Layers allow you to organize, segregate, controlthe visibility, and manage plotting of the drawing.

Think of layering as being able to draw on

transparent overlays with each overlay containingrelevant or grouped objects, see Figure 5-2.

When all of theoverlays arestackedtogether, seeFigure 5-3,you can seeand work withall of them. At

any time duringthe drawingprocess, youcan turn off,

Figure 5-2

Layers Seen as Overlays

Figure 5-3

Stacked Layers

freeze, or lock layers. This allows you to control the drawingand plotting process of the drawing.

There is no limit to the number of layers you can create ineach AutoCAD drawing. As you create them, you can givethem a name or allow AutoCAD to automatically name them.You can also assign a color, linetype, lineweight, and plot

style to each one. In this module, we will only be discussing naming and assigning the color.

In addition to the items just mentioned, you can also control the visibility of each layer bytoggling layers off and on or freezing/thawing them. You can also lock or unlock a layer toprevent them from being edited.

AutoCAD's Special Layer

AutoCAD has a special layernamed 0 (the number zero). Each new drawing created in

AutoCAD will automatically contain this layer. It cannot be deleted or renamed. Layer 0 will bediscussed further in future modules.

The Current Layer

The current layeris the layer that AutoCAD will place all newly created objects. One layer must

be current at all times. The current layer can be turned off but never frozen. You can changethe current layer at any time.

ByLayer

AutoCAD assigns the color, linetype, and lineweight properties to objects either ByLayer or

ByObject. In the modules, we will keep things simple to start with so we will work ByLayer in alllab exercises unless you are instructed differently. An easy way to check to see if you areworking ByLayer is to look at the Properties toolbar as shown in Figure 5-4.



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2004-2008

2000-2002

Figure 5-4

Properties Tool Bar Showing all of them set to ByLayer

The three left boxes should always display the words ByLayer as shown in Figure 5-4.

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Simply, ByLayermeans that when an object is inserted into the drawing or an existing object is

regenerated, it looks in the drawings data base to see what color, linetype and lineweight itshould display. If it is set to ByLayer, it will then check what layer it is located on and displaysthe color, linetype and lineweight assigned to that layer. Most companies require their drawings

to be drawn using a layering scheme.

AutoCAD Command: LAYERThe LAYER command is used to open the Layer Property Manager dialogue box.

Shortcut: LA

2004-2008

2000-2002

On/Off: Toggles the objects on the layer on or off. In other words, visible or not visible.

Freeze/Thaw: Toggles the layer to be frozen or thawed. The objects on a frozen layer

are not visible and do not regenerate. The objects on a thawed layer are

visible and will regenerate.

Lock/Unlock: Toggles the layer locked or unlocked. Objects on a locked layer are

visible but cannot be edited or deleted.

Color:

Layers

Sets the color for the layer. All objects on the layer with the property ByLayer,will be display the color assigned to the layer.

The CAD Guys Ltd. Copyright 1993 - 2007 Module 5


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5 - 4 AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-04-11

The current layer is the layer that any newly inserted object will reside on. Itis important to always be aware of what the current layer is before insertingobjects.

Using the LAYER Command in 2005-2008

For AutoCAD 2005-2008 users only. If you are using 2000-2004, skip to

page 5-7)

Workalong and complete the steps below.

Step 1 Using the NEW command, start a new drawing using the template Module

Template A.

Step 2 Save and name the drawing AutoCAD 2D Workalong 05-1 and save it in the

folder: CAD Courses/AutoCAD 2D/Lab Exercises

Step 3 Enter the LAYER command. You can do this by clickingthe icon shown in Figure Step 3A. This will open the LayerProperties Manager dialogue box as shown in Figure Step 3B.

Figure Step 3A

Figure Step 3B

Step 4 Take note of layer 0 (zero). It is automatically created in all new drawings and

cannot be deleted or renamed. The other two layers are part of the template drawing.Ignore them for now. The Current Layer is 0.

Step 5 Click the New Layer icon, Figure Step 5A, and AutoCAD

will create a new layer. It will automatically name the layerLayer1 as you can see in Figure Step 5B.

Step 5A

...continued on page 5-5



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Using the LAYER Command in 2005-2008 - continued

Figure Step 5B

Step 6 Rename the layer to Object as shown in Figure

Step 6.

Figure Step 6

Figure Step 7A

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Step 7 Set the color for the Object layer by clicking the color name, white in this example,

as shown in Figure Step 7A. This will open the Select Color dialogue box as in Figure Step

7B. Select the color by clicking it or enter the name in the Color box. In this example, it isred. Then click OK.


Layers

Figure Step 7B



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Step 8 Click layer Object to highlight

it and then click Set Current icon asshown in Figure Step 8A.

The Green Checkmark icon will

display under Status indicating thatthe current layer is Object as you cansee in Figure Step 8C.

Step 9 Change the on/off,thaw/frozen and lock/unlockproperties of the layers as shown inFigure Step 9. The icons will toggleas you click them.

Figure Step 8B

Figure Step 8C

Figure Step 8A

Figure Step 9

Step 10 Click OK to end the command and close the dialogue box. Skip to page 5-9.

..continued on page 5-9

2005-2008

Unless otherwise instructed while

working in the AutoCAD Modules,select the colors from the Standard

Color Palette as shown to the right. The colorsincluded in this palette are the common colors andare named. The colors from the chart above it arenumbered colors and should not be used unless instructed to do so in a lab exercise.

White and black are the same color to AutoCAD. White will display black on a whitebackground and black will display white on a black background.



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Using the LAYER Command in 2000-2004

For AutoCAD 2000-2004 users only. If you are using 2005-2008, skip to

page 5-9)

Workalong and complete the steps below.

Step 1 Using the NEW command, start a new drawing

using the template Module Template A.

Step 2 Name the drawing AutoCAD 2D Workalong 05-1

and unless otherwise instructed, save it in the folder: CAD

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Courses/AutoCAD 2D/Lab Exercises

Step 3 Enter the LAYER command. You can do this by

Figure Step 3A

clicking the icon shown in Figure Step 3A. This will open the Layer Properties Managerdialogue box as shown in Figure Step 3B.

Figure Step 3B

Step 4 Take note of layer 0 (zero). It is automatically created inall new drawings and cannot be deleted or renamed. The other

two layers are part of the template drawing. Ignore them for now.The Current Layer is 0.

Step 5 Click the New button,

Figure Step 5A, and AutoCAD willcreate a new layer. It willautomatically name the layer Layer1as you can see in Figure Step 5B

Figure Step 5A

Figure Step 6

Figure Step 5B

Step 6 Rename the layer to Object as shown in

the figure on the right.




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Step 7 To set the color for the layer, click the

color name. In this example, white. This will

open the Select Color dialogue box as in FigureStep 7. Select the color by clicking it or enterthe name in the color box as shown in FigureStep 7 where it is red. Then click OK.

Figure Step 8A

Step 8 Click layer Object to highlight it

and then click the Current button as shownin Figure Step 8A.. Take note that layerObject is now the current layer as shown in

Figure Step 7 Figure Step 8B.

Step 9 Change the properties of the layers as

shown in Figure Step 9. The icons will toggle asyou click them.

Figure Step 9

.. continued on page 5-9

2000-2004

Figure Step 8B

Step 10 Click OK to end the command

and close the dialogue box.

Unless otherwise instructed while

working in the AutoCAD Modules,select the colors from the Standard Color

Palette as shown on the right. The colors included in thispalette are the common colors and are named. Thecolors from the chart below it are numbered colors and should not be used unlessinstructed to do so in a lab exercise. White and black are the same color to AutoCAD.White will display black on a white background and black will display white on a blackbackground.



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Using the LAYER Command - continued

Step 11 Once you have created your

layers, you can use the Layer toolbar

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menu to change the current layer or

toggle the layer properties. See FigureStep 11. This is much faster then usingthe Layer Properties Manager dialogue

box. This toolbar should always beenabled and located across the top ofthe graphic screen. Take note how thecurrent layer will display. In this case itis Object as shown in Figure Step 11.

Step 12 Pull down the layer list by

clicking the small triangle on the rightside as shown in Figure Step 12A.Change the current layer to 0. Youcan do that by clicking the layer nameas shown in Figure Step 12A. FigureStep 12B now displays the currentlayer 0.

Step 13 Pull down the layer list again

and this time toggle the layerproperties so that all four layer are on,thawed and unlocked as shown in FigureStep 13.

Figure Step 11

Figure Step 12A

Figure Step 12B

Figure Step 13

Figure Step 14

Step 14 Change the current layer to Object as shown in Figure Step 14.

Step 15 Save and close the drawing.

AutoCAD 2000-2004 and 2005-2008 have a slightly different look as you can see below. Also take

note how in 2005-2008 the layer list is located in the Layers toolbar and in 2000-2004 it islocated in the Object Properties toolbar menu.

2000-2004 2005-2008

Layers

AutoCAD has a special layer named 0 (the number zero). Each new

drawing created in AutoCAD will automatically contain layer 0. It cannot be

deleted or renamed. It has other special attributes as you will see in futuremodules.



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It is important to know the different between a layer that is Off and a layer

that is Frozen. A layer that is Off, does NOT display but WILL regenerate.A frozen layer does NOT display and will NOT regenerate. This is

important as you will learn as you work your way through the modules.

To quickly set the current layer in the Layer Property Managers dialogue

box, double click the Status icon beside thelayer name as shownin the figures right.This works in

AutoCAD 2005-2008 only.

AutoCAD does not know the difference between the colors black and white.

On a black background, black will display white and on a white background,white will display black.

In Module 3, you were shown how to insert a key onto your drawing tocheck it for accuracy. The key resides on the layer Key. If you arerequired to work on your drawing after you inserted the key, toggle layerKey Off. To re-check your drawing after you finish the editing, toggle layerKey On as shown in the figures below.

Key Off

The Key Principles in Module 5

Key On

1. AutoCAD's layering system is one of the most important features to the AutoCAD

Operator. Layers allow you to organize, segregate, control the visibility, and manageplotting of the drawing. They are use extensively in companies using AutoCAD.

2. The current layer is the layer that any newly inserted object will reside on.

3. A layer that is Off, does NOT display but WILL regenerate. A layer that is frozen does

NOT display and will NOT regenerate.

4. AutoCAD has a special layer named 0 (the number zero). Each new drawing created in

AutoCAD will automatically contain layer 0.



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AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-04-11 5 - 11

Lab Exercise 5-1

Drawing Specifications

Time Allowed: 30 Min.

Name

AutoCAD 2D Lab 05-1

Template

Module Template A

Units

Inches

Text Style

N/A

Font

N/A

Note: Color, Linetype, and Lineweight are all < ByLayer< unless otherwise instructed.

Layering Scheme

Objects on Layer Name Color Linetype Lineweight

All Lines

Instructions:

Object Red Continuous N/A

1. Start a new drawing using the template shown above.2. Save and name the drawing with the name AutoCAD 2D Lab 05-1 in the folder:

CAD Courses/AutoCAD 2D/Lab Exercises3. Setup the layers using the Layering Scheme shown above.4. Draw the object shown below using the layering scheme above. In this drawing,

all the lines should be on layer Object and display red.5. Check your drawing with the key. The key name is the same as the drawingname shown above. If you have trouble doing this, redo Module 3.

6. If you have any errors, correct your drawing.7. Turn layer Key off.8. Save and close the drawing.

AUTOCADSELF-PACED LEARNINGMODULES

Completed

Drawing



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Construction Hints

Do your best to complete the lab exercise drawing without using the following hint(s). If you get stuck and

can't complete it on your own, use the following hint(s) to help you.

Hint 1

Figure Hint 1



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AutoCAD Self-paced Learning Modules - AutoCAD 2D - Revised 2007-04-11 5 - 13

Lab Exercise 5-2

Drawing Specifications

Time Allowed: 30 Min.

Name Template Units Text Style Font

AutoCAD 2D Lab 05-2 Module Template A4 Millimeters N/A N/A

Note: Color, Linetype, and Lineweight are all < ByLayer< unless otherwise instructed.

Layering Scheme

Objects on Layer Name Color Linetype Lineweight

All Lines

Instructions:

Object Red Continuous Default

1. Start a new drawing using the template shown above.2. Save and name the drawing with the name AutoCAD 2D Lab 05-2 in the folder:

CAD Courses/AutoCAD 2D/Lab Exercises3. Setup the layers using the Layering Scheme shown above.4. Draw the object shown below using the layering scheme above. In this drawing,

all the lines should be on layer Object and display red.5. Check your drawing with the key. The key name is the same as the drawingname shown above. If you have trouble doing this, redo Module 3.

6. If you have any errors, correct your drawing.7. Turn layer Key off.8. Save and close the drawing.

AUTOCADSELF-PACED LEARNING MODULES

Completed

Drawing



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Construction Hints

Do your best to complete the lab exercise drawing without using the following hints. If you get

stuck and can't complete it on your own, use the following hint(s) to help you.

Hint 1

Figure Hint 1


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