Untitled Document

In This Chapter

Working with Layers and
Layer Groups

In this tutorial, you learn more about the various com-

mands used for working with layers and layer groups in

AutoCAD

Mechanical 6.

■

Changing a layer by selecting
objects

■

Creating layer groups

■

Using a layer group to copy
objects

Chapter 5

Working with Layers and Layer Groups

Key Terms

Term

Definition

base layer

A layer made up of working layers and standard parts layers. Base layers are
repeated in every layer group.

layer group

A group of associated or related items in a drawing. A major advantage of
working with layer groups is that you can deactivate a specific layer group and a
complete component. The drawing and its overview is enhanced with a reduction
in regeneration time.

part layers

The layer where the standard parts are put. All standard parts layers have the
suffix AM_*N.

working layer

The layer where you are working.

Working with Layers and Layer Groups

Working with Layers and Layer Groups

Layers and their colors can be customized and renamed according to your
needs using the Mechanical Options dialog box > Layer / Object Settings. See
the Online help for further information on this topic.

■

Layer 0 is a default layer and not a mechanical layer, because this layer has
special properties (by block). If you want to have these special properties
available, just rename for example layer AM_0 to 0 in the Mechanical
Options.

■

Because AutoCAD 2000 always starts with Layer 0, we recommend using
template files, where layer AM_0 is always the starting layer.

■

If you move elements on layer 0 to other layer groups, you are asked if you
always want to move the elements on layer group layergroupname-AM_0.

Getting Started

Open the initial drawing.

To open a drawing

Open the file tut_ex02 in the acadm\tutorial folder.

Menu

File ➤ Open

Command

OPEN

Zoom in to the area of interest.

Menu

View ➤ Zoom ➤ Window

Command

ZOOM

Chapter 5

Working with Layers and Layer Groups

Respond to the prompts as follows:

Specify first corner:

Specify first point (1)

Specify opposite corner:

Specify second point (2)

Save your file under a different name or to a different directory to preserve
the original tutorial file.

Changing a Layer By Selecting Objects

First, you move the layer (and layer group) containing two objects to another
layer (and layer group) by selecting an object in the aforementioned layer
(and layer group).

Working with Layers and Layer Groups

To change a layer by selecting an object

Start the Move to another Layer command.

Menu

Modify ➤ Properties ➤ Move to another Layer

Command

AMLAYMOVE

Respond to the prompts as follows:

Select objects:

Specify the centerlines of the differential gear (1, 2)

Select objects:

Press

ENTER

Specify new layer using object, layer field or keyboard (RETURN for dialog):

Specify the engine centerline (3)

The centerlines of the differential gear are moved to the layer and layer group
of the engine centerline.

Save your file.

Creating Layer Groups

Layer groups provide an easy and intelligent way to structure assembly
drawings. Using layer groups enables you to highlight single parts and lock
and freeze whole parts. This gives you a better overview of your assembly
drawing.

First, you move a block to a layer group.

Chapter 5

Working with Layers and Layer Groups

To move a block to a layer group

Start the Move to Another Group command.

Menu

Modify ➤ Properties ➤ Move to another Layer Group

Command

AMLGMOVE

Respond to the prompts as follows:

Select objects:

Specify the gear (1)

Select objects:

Press

ENTER

In the Layer Control dialog box, choose the Create button, and create a new
layer group called Gear. Choose OK.

Working with Layers and Layer Groups

In the AutoCAD dialog box, choose Yes.

The complete block is moved to the layer group Gear.

Now, you create two new layer groups and move the parts (blocks) to those
groups.

To create a new layer group

Start the Layer Group Control command.

Menu

Assist ➤ Layer / Layergroup ➤ Layer/Layer Group Control

Command

AMLAYER

In the Layer Control dialog box, choose the Layer Group Control tab, and
choose Create. Enter Coverplate for the layer group name.

Choose Create again, and create a layer group called Bushing. Choose OK.

Chapter 5

Working with Layers and Layer Groups

Start the Move to Another Group command.

Menu

Modify ➤ Properties ➤ Move to another Layer Group.

Command

AMLGMOVE

Respond to the prompts as follows:

Select objects:

Specify the coverplate (1)

Select objects:

Press

ENTER

In the Layer Control dialog box, select the layer group Coverplate, and
choose OK.

Now, move the bushing to the new Bushing layer group.

Working with Layers and Layer Groups

To move elements to another layer group

Start the Move to Another Group command.

Menu

Modify ➤ Properties ➤ Move to another Layer Group

Command

AMLGMOVE

Respond to the prompts as follows:

Select objects:

Specify the bushing (1)

Select objects:

Press

ENTER

In the Layer Control dialog box, select the layer group Bushing, and choose OK.

The coverplate and the bushing have now been moved to their respective
layer groups.

Save your file.

Chapter 5

Working with Layers and Layer Groups

Using a Layer Group to Copy Objects

Now, copy the objects of the layer group Shaft to a new drawing border.

To copy objects of a layer group

Zoom to the extents of the drawing.

Menu

View ➤ Zoom ➤ Extents

Command

ZOOM

Start the Visibility Enhancement command.

Menu

Assist ➤ Layer / Layergroup ➤ Visibility Enhancement

Command

AMLAYVISENH

In the Visibility Enhancement dialog box, specify:

Mode:

Color all Inactive Layer Groups

Choose OK.

NOTE

For a correct representation, it could be necessary to start the Regen

command.

Start the Layer Group Control command.

Menu

Assist ➤ Layer / Layergroup ➤ Layer/Layer Group Control

Command

AMLAYER

Working with Layers and Layer Groups

In the Layer Control dialog box, choose the Layer Group Control tab, and
select the layer group Shaft. Choose the Current button, and then choose
OK.

NOTE

You can activate the layer group Shaft with a double-click, too.

Now copy the layer group Shaft to the second drawing border.

Start the Copy command, responding to the promt.

Modify ➤ Copy ➤ Copy

Command

COPY

Select objects:

Select Layer Group Control

Chapter 5

Working with Layers and Layer Groups

Select the layer group.

Menu

Assist ➤ Layer / Layergroup ➤ Layer/Layer Group Control

Command

’AMLAYER

In the Layer Control dialog box, choose the Layer Group Control tab, and
select the layer group Shaft. Choose the Selection Set button.

In the AutoCAD dialog box, choose OK.

Choose OK.

Working with Layers and Layer Groups

Respond to the prompts as follows:

Select objects:

Press

ENTER

Specify base point or displacement, or [Multiple]:

Specify a point on the shaft

Specify second point of displacement or <use first point as displacement>:

Specify another point in the drawing border on the right

Now, your second drawing border looks like this:

This is the end of the tutorial chapter.

Save your file.