Step1. Create and name the model of part as HELICAL_ SWEEP_VAR.PRT.
Step2. Select the helical sweep command: click
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Step3.Define helical sweep properties: click
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Step4. Define the helical sweep trajectory.
(1) Specify profile of the surface to revolution: click
>select the FRONT plane as the sketch plane>
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>select the RIGHT plane as reference plane
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(2) Draw the trajectory as Fig.2 shown. Then click
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