6.1.8 Cam Constraints within a Multistage Constraint

When a cam constraint is used within a TimeSwitch or StageSwitch function, the extra degrees of freedom that are introduced by the cam constraint must be dealt with when the cam constraint is not active. The following example shows how a TimeSwitch constraint might be used with a Modeler2D CamToPlane1 constraint.

Here is an example of a TimeSwitch with a cam constraint.

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When the value of time exceeds 2.5 the one mechanical degree of freedom that was constrained by CamToPlane1 is constrained by RelativeAngle1, while the values of the two cam surface parameters alpha and beta are constrained to be equal to two constants.
If this technique were not used, the values of alpha and beta would be unconstrained after T = 2.5 and the model would not run.