About Subanimations
Use the 
Subanimation command to include an animation created with your assembly or any of its subassemblies in the current animation. This included animation becomes a subanimation. By default, a subanimation references the ground body. If your subanimation moves relative to another rigid body, you must reference the other rigid body. Use the Subanimation dialog box to reference the other rigid body.
Subanimation command to include an animation created with your assembly or any of its subassemblies in the current animation. This included animation becomes a subanimation. By default, a subanimation references the ground body. If your subanimation moves relative to another rigid body, you must reference the other rigid body. Use the Subanimation dialog box to reference the other rigid body.When including a subanimation, make sure that:
• The reference rigid body is not part of the subanimation. If reference rigid body movement is defined in the subanimation, the resulting animation may be erratic due to the conflicting rigid body settings.
• Only the rigid bodies that should move are defined as Desired (the default) or Required when you insert a key frame sequence in a subanimation. Any rigid bodies defined as Unspecified will not move with the reference rigid body. Use the Key Frame Sequence dialog box to change rigid body definitions.
• Only those rigid bodies that are actively defined in a subanimation will move with reference to the specified rigid body. A rigid body that is not specified will not move. For example, a door that is opening on a moving car will stop moving with the car if it is defined for only half of the animation.
Click > Subanimation. The Subanimation dialog box opens. Select the animation to include and click Include. By default, the start time of the included animation is 0.0 in the current animation.
Subanimation. The Subanimation dialog box opens. Select the animation to include and click Include. By default, the start time of the included animation is 0.0 in the current animation.Animation element details are not displayed on a newly-included subanimation in the timeline. To make these elements visible, click the plus sign at the beginning of the subanimation on the timeline.