An angle is used as the driving dimension to determine the number of
instances in the circular pattern CirPattern1. The
angle between the spokes is the variable defined for the Evaluation Design Study.
The parameter for the angle between the spokes is defined in the
example file. To follow the procedure below, delete the pre-defined parameter in the
Parameters dialog box. To delete the parameter, right-click the Parameters node in
the Simulation study tree and select Delete.
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Right-click the Scenarios
study tab and click Create New Design
Study.
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Double-click the Design
Study tab and rename the study as Pulley_Designs.
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On the Table View tab of
the Pulley_Designs study tab, in the
Variables section, select Add Parameter.
The Parameters
dialog box appears.
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In the Parameters dialog
box, for Name, type Angle.
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Set Category to
Model Dimension.
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In the graphics area, click the 180° driving dimension shown in
the figure.

D2@CirPattern1@Pulley.Part appears in the Model Dimension box.
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Click OK to close the
Parameters dialog box.
You can define more than one variable in a Design Study,
such as the diameter of the pulley, the material properties, or the mesh
size.