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Creation of derivative dimensions |
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To represent the dimensions of sketches and/or operations as detailing elements, invoke the Derivative dimensions 
command.
Step-by-step instructions
1.In the graphic area or in the Design Tree, specify the objects whose dimensions need to be displayed as detailing elements. Names of the selected objects will appear in the Objects field on the Parameter Panel.
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Objects can be selected also prior to invoking a command. |
The dimensions of selected objects will appear in the graphic region. You can reconfigure the dimensions without interrupting the command execution. To that end, select the required dimension in the graphic area and edit it using the defining points.
2.If it is required to create zero-value dimensions, enable the Dimensions with zero value option.
3.To complete creation of derivative dimensions, click Create Object 
.
After running the described actions, in the Design Tree there will appear icons matching the types of created dimensions.
4.To complete operation of the command, click Finish 
.
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Derivative dimensions for zero-value dimensions are displayed only in the Design Tree. In the graphic area, these derivative dimensions are not displayed. |
Right after creation, the derivative dimensions are placed as follows:
•the derivative dimension of the sketch is placed in the plane of this sketch,
•the derivative size of operation is located in the plane automatically detected by the system depending on the type of dimension and object created by the operation.
If necessary, one or several derivative dimensions can be moved to another plane. To that end, use the Place derivative dimensionscommand.
The value of a derivative dimension can be changed.
Specialties of creation of derivative dimensions
During creation of derivative dimensions for a chamfer built over the side and 45° angle, one linear derivative dimension (according to the standard) is created. The text of this dimension caption contains values of the side length and the chamfer angle, for example, 5x45°.
If necessary, you can create two derivative dimensions for this chamfer – linear and angular. Use the following procedure.
1.Edit the dimension text for a linear derivative dimension so that it contains only the value of the chamfer length.
2.Invoke the Derivative dimensions command.
3.Create a derivative dimension, having specified a chamfer as the object.
An angular derivative dimension will be added to the linear derivative dimension.
Cosmetic Thread
When creating derivative dimensions for a cosmetic thread, a thread length dimension and a thread designation are created.
For all threads except for conical and straight pipe, thread designation looks like diameter dimension set to the outer diameter of the thread. The base plane of the dimension is perpendicular to the thread axis, and its dimension text contains the thread designation. In the Design Tree, thread designation is marked with a diameter dimension 
icon.
For conical and straight pipe threads the designation is set as a leader. The base plane of a leader is perpendicular to the thread axis. In the Design Tree, thread designation is marked with a special 
icon.
To create derivative dimensions, specify:
•cosmetic thread, if it was created using the Cosmetic Threadcommand,
•hole with thread, if the thread is obtained in the process of constructing the hole..
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If you need to set only the thread designation (without creating the thread length dimension), then depending on the thread type use the diameter dimension or leader. |
See Also
