AutoCAD 2010 Training

In Place Reference Editing

 

Aims and Objectives

The aim of this tutorial is to edit block and external references. After studying this tutorial, you should be able to:

 

In-Place Reference Editing

Here, blocks and external references are considered as references. By using in-place reference editing technique, you can edit a block within a drawing without having to explode a block definition and to redefine the block, and you can edit an externally referenced drawing without having to open the external drawing.

 

Block Editing

Start a new drawing from scratch. Use Metric defaults. Then use the BOX command to construct a solid box. After that, set the display to an isometric view. See Figure 1.

Using Startup system variable to control display of  New Drawing dialog box when a new drawing is started with NEW or QNEW.

Command: STARTUP
Enter new value for STARTUP <0>: 1

Using menubar system variable to control display of menu bar.

Command: MENUBAR
Enter new value for MENUBAR <0>: 1

<File> <New...>

Command: NEW
[Create New Drawing
Start from Scratch
Metric
OK ]

Figure 1  New Drawing

<Modeling panel> <Box>

Figure 2  Box menu

Command: BOX
Specify corner of box or [CEnter]:
10,10
Specify corner or [Cube/Length]:
@40,30,20

<View panel>  <SW Isometric>

Figure 3  SW iso menu

fig1.gif (1973 bytes)
Figure 4  Box constructed and display set to isometric view

Use the BASE command to set the insertion base point. Then save and close the drawing.

<Insert tab> <Block panel> <Set Base Point>

Figure 5  Set Base Point menu

Command: BASE
Enter base point: [Select Endpoint A (Figure 4).]

<File> <Save>
File name: Refed01.dwg

<File> <Close>
Command: CLOSE

Now start another new drawing. Then turn on the AutoCAD Design Center. After that, select the Desktop button and the directory in which you save the last drawing. See Figure 2.

<File> <New...>

Command: NEW
[Create New Drawing
Start from Scratch
Metric
OK ]

<Insert tab> <Content panel><DesignCenter>


Figure 6  Design center

Command: ADCENTER

fig2.gif (6561 bytes)

Figure 7 AutoCAD Design Center and drawing selected

Select the drawing in the Palette of the AutoCAD Design Center. Then select the right mouse button (Figure 7). After that, select the Insert as Block... item to insert the drawing as a block. See Figure 8.

Figure 8 Insert as Block

Figure 9 Insert dialog box

Select Specify on-Screen

In the Insert dialog box, select the OK button and select a point on the screen. Then use the INSERT command to insert the block again. After that, set the display to an isometric view. See Figure 10.

Specify insertion point or [Scale/X/Y/Z/Rotate/PScale/PX/PY/PZ/PRotate]: 20,20

<Insert tab> <Block...><Insert>

Command: INSERT
Specify insertion point or [Scale/X/Y/Z/Rotate/PScale/PX/PY/PZ/PRotate]:
100,40

<View> <3D Views> <SW Isometric>

fig5.gif (1865 bytes)

Figure 10 Blocks inserted and display set

Construct a solid cone. See Figure 11.

<Modeling panel> <Solids> <Cone>


 

Figure 11 Construct Cone

Command: CONE
Specify center point for base of cone or [Elliptical]>:
MID of [Select A (Figure 12).]
Specify radius for base of cone or [Diameter]:
10
Specify height of cone or [Apex]:
30

fig6.gif (2353 bytes)

Figure 12 Solid cone constructed

Use the REFEDIT command to edit one of the block insertion. Figure 13.

<Insert tab> <Reference panel> <Edit Reference>


Figure 12 Edit Reference

Command: REFEDIT
Select reference:
[Select A (Figure 12).]

Figure 13 Reference Edit dialog box

Select the [OK] button.
Add Cone to current Working Set


Figure 14 Add object to Working Set

Command: REFSET
Transfer objects between the RefEdit working set and host drawing
Enter an option:
[Select B (Figure 16).]

Now use the SUBTRACT command to subtract the cone from the select block. See Figure 15.

 <Solids Editing panel> <Subtract>


 

Figure 15 Solid Editing

Command: SUBTRACT
Select solids and regions to subtract from ..
Select objects:
[Select A (Figure 16).]
Select objects:
[Enter]
Select solids and regions to subtract ..
Select objects:
[Select B (Figure 16).]
Select objects:
[Enter]


 

Figure 16 Subtraction

FIG8A.gif (1362 bytes)

Figure 17 Block modified

To save the change, use the REFCLOSE command by selecting the Save back changes to reference button of the Refedit toolbar. See Figure 18.


Figure 18 Refclose

Command: REFCLOSE
Select [OK]


Figure 18 Save reference changes
 

FIG9.gif (2085 bytes)

Figure 19 Block definition modified

Note in Figure 19 that the other block is also changed because the block definition is modified.

External Reference Editing

Start another new drawing. Then select the drawing Refed01 from the palette of the AutoCAD Design Center. After that, select the right mouse button and the Attach as Xref... button. See Figure 10.

<File> <New...>

Command: NEW
[Create New Drawing
Start from Scratch
Metric
OK ]

Figure 20 AutoCAD Design Center

Specify the insertion point. Then set the display to an isometric view. See Figure 21.


Figure 20 Attach External Reference

Specify insertion point or [Scale/X/Y/Z/Rotate/PScale/PX/PY/PZ/PRotate]: 10,10

<View panel> <SW Isometric>

FIG11.gif (1801 bytes)

Figure 21 Drawing attached and display set

Construct a solid cylinder. See Figure 22.

<Modeling panel <Cylinder>

Command: CYLINDER
Specify center point for base of cylinder or [Elliptical]:
MID of [Select A (Figure 21).]
Specify radius for base of cylinder or [Diameter]:
10
Specify height of cylinder or [Center of other end]:
30

fig12.gif (2556 bytes)

Figure 22 Solid cylinder constructed

Use the REFEDIT command. Then use the SUBTRACT command to modify the external reference. After that, use the REFCLOSE command. See Figure 23.

<Insert tab> <Reference panel> <Edit Reference>

Command: REFEDIT
Select reference:
[Select A (Figure 22).]
[OK ]
 

Add Cylinder to current Working Set


Figure 23 Add object to Working Set

Command: REFSET
Transfer objects between the RefEdit working set and host drawing
Enter an option:
[Select B (Figure 22).]

 <Solids Editing panel> <Subtract>


 


 


Figure 24 Solid Editing

 

Command: SUBTRACT
Select solids and regions to subtract from ..
Select objects:
[Select A (Figure 22).]
Select objects:
[Enter]
Select solids and regions to subtract ..
Select objects:
[Select B (Figure 22).]
Select objects:
[Enter]

To save the change, use the REFCLOSE command by selecting the Save back changes to reference button of the Refedit toolbar. See Figure 18.


Figure 25 Refclose

Command: REFCLOSE
Select [OK]


Figure 26 Save reference changes

 

Command: REFCLOSE
[AutoCAD
All references edits will be saved
OK ]

FIG13.gif (2163 bytes)

Figure 27 External referenced drawing modified

Save and close the drawing.

Now open the drawing Refed01.dwg. Note that it is modified.

Key Points

You can edit the block and the externally referenced drawing by using the REFEDIT command. This command enables you to edit a block in a drawing and to edit an external referenced drawing.

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