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Hip tip: Multiple EXTEND and TRIM by using FENCE option.

2 Comments Jan-29-2008 | Posted by Orhan Toker | Printable Version | Level |

AutoCAD 2000 and higher versions

We may sometimes work on with multiple lines when using TRIM and EXTEND commands in Autocad. A fast method exists for this situation which is using the FENCE option for both commands. Let us see how it is possible by extending the lines in Figure 1 as a whole to the red line.

Fig.1

Command: _EXTEND
Current settings: Projection=UCS, Edge=None
Select boundary edges …
Select objects or <select all>: 1 found (Red line is marked)
Select objects:
Select object to extend or shift-select to trim or
[Fence/Crossing/Project/Edge/Undo]: f (FENCE option is selected)
Specify first fence point: (Fence is drawn by passing all lines)
Specify next fence point or [Undo]:
Specify next fence point or [Undo]:
Select object to extend or shift-select to trim or
[Fence/Crossing/Project/Edge/Undo]:

Fig.2

You can see all of the lines are extended when you draw a fence and press enter.

Let us now, use TRIM command with FENCE option.

Fig.3

Command: trim
Current settings: Projection=UCS, Edge=None
Select cutting edges …
Select objects or <select all>: (Select all by pressing enter)
Select object to trim or shift-select to extend or
[Fence/Crossing/Project/Edge/eRase/Undo]: f
Specify first fence point:
Specify next fence point or [Undo]:
Specify next fence point or [Undo]:
Select object to trim or shift-select to extend or
[Fence/Crossing/Project/Edge/eRase/Undo]:

During TRIM command, if you respond the option

Select cutting edges …
Select objects or <select all>:

by pressing ENTER, all objects seen in the area are selected as the trimming and cutting objects. This is a clue. The rest of it can be worked out by FENCE.

Fig.4

Fig.5

May it be easy.

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