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Now, you can carry out automatic feature
recognitions in local mode i.e. you can select a region of a solid by
selecting faces in that zone and can run automatic feature recognition only
in that region locally, which can be very useful under some circumstances.
When the Local mode was not available, that could
be achieved by:
- using manual feature recognition, but then
you will have to select and recognize one feature at a time.
or
- by using automatic feature recognition, but
then you will have to run it on the complete solid body, which will
unnecessarily take more time and will recognize also feature which are of
no interest.
Both of these approaches cause either
considerable selection effort and/or time consumption. Now, Local
Feature Recognition, makes it very easy:
- it saves time and effort, when you do not want all features in the
part to be recognized.
- It also recognizes pads, pockets, grooves, shafts and Boolean
features whereas in automatic mode only holes, fillets and chamfers can
be recognized.
This scenario shows you how to use automatic feature recognition in
local mode. |
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Click the Automatic Feature Recognition
icon
.
The Feature Recognition dialog box appears.
-
Check the Local Feature Recognition (LFR)
option.
Now all feature types are available for recognition.
-
If you want to recognize all features in the yellow
region, first click Chain Up To faces field and then select
the three faces as shown in cyan color:
-
Click the Selected Faces field and select any
yellow face.
-
Select the All option to recognize all
features.
All feature types are then checked in the dialog box.
-
To improve visibility, deselect Show Labels.
-
Click OK to compute the result.
The features corresponding to the selected purple faces are now
recognized.
Face Selection Modes
The following selection modes are available for
recognizing features locally:
-
Limited by Up To faces (default mode):
selects all faces from the faces you selected to Up To faces.
For this mode, it is advisable to first select Up To faces
and then to select selected faces. When no face is selected as Up
To faces, then adjacent tangent faces, of the faces picked by user,
are chained.
-
Internal loops on Up To faces: selects
all faces which form internal loops on Up To faces.
-
Tangency: selects all tangent faces to
the faces you selected as Selected faces.
-
Adjacency: selects faces which are
adjacent to the faces picked by user as Selected faces.
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These selection modes are available via contextual
commands from the the Selected Faces list and these are
available only for local feature recognition.
Using the Internal loops on Up to Faces Selection Mode
In the second part of our scenario you will see how the
Internal loops on Up To faces selection mode helps in
selecting faces for local feature recognition.
-
Launch again the Automatic Feature Recognition
and select the Local Feature Recognition option.
-
Right-click on the Selected Faces list and
select the Internal loops on Up To faces contextual command.
-
Click
the Chain Up To faces field and select the upper face
of the pad as shown by cyan color below, then all the magenta colored
faces as shown in the image below get selected.
-
Deselect the Show Labels option to improve
visibility.
-
Select All to recognize all types of features.
-
Click OK to obtain this result: all features
are recognized.
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