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<a name = "hj-top"> </a><table class = "table1" id = "table11"><tr><td><table class = "DocHeader"><tr><td class = "DocHeader1" colspan = "2"><h1>Creating Kinematic Links Between Actors</h1></td></tr><tr><td class = "DocHeader4" colspan = "2"/></tr><tr><td class = "DocHeader3"><table class = "DocHeaderIntro" id = "table12"><tr><td class = "Intro1Only"><p class = "header"><p class = "abstract"><span class = "shortdesc">Kinematic commands let you manage the assembly tree structure and animate assemblies using kinematic constraints. You can apply kinematic links to parts and assemblies.</span>

    
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</p></td></tr></table></td><td class = "DocHeader2"><table class = "DocTopicsSeeAlso" id = "table13"><tr><td class = "TopicsTitle">See Also</td></tr><tr><td><a title = "You can use pivot alignment to move a local coordinate system to a defined kinematic condition." href = "cps-t-ActorsTransform-AlignPivotsUse.htm#cps-t-ActorsTransform-AlignPivotsUse">Using Align Pivots</a></td></tr><tr><td><a title = "Transform commands let you translate and rotate alignments, and explode actors." href = "cps-r-Ribbon-Transform.htm#cps-r-Ribbon-Transform">Transform Tab</a></td></tr></table></td></tr></table>
  

  
  
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    <section><ol class = "ol steps"><li class = "li step stepexpand">Click <span class = "ph menucascade"><span class = "ph uicontrol">Transform</span><abbr title = "and then"> &gt; </abbr><span class = "ph uicontrol">Link Child to Parent</span></span> <img class = "image" src = "../Icons3DVIA/I_CPSKinematicLinkChildToParent.png"/> to create child-parent relationships between the actors. You can also achieve this by dragging actors into assemblies in the Assembly tree.<div class = "itemgroup stepresult">
<div class = "note collapse"><span class = "run-in.note">Note:
    		</span><span class = "notecontent"> A child can have only one parent but a parent can have multiple children.</span></div>
</div></li><li class = "li step stepexpand">Click 
<span class = "ph menucascade"><span class = "ph uicontrol">Transform</span><abbr title = "and then"> &gt; </abbr><span class = "ph uicontrol">Pivot Transform Mode</span></span> <img class = "image" src = "../Icons3DVIA/I_CPSTransformPivotTransform.png"/> and 
pivot alignment tools to align each child-parent group's pivots.<div class = "itemgroup stepresult">
<div class = "note"><span class = "run-in.note">Note:
			</span><span class = "notecontent">For kinematic motions to work, a child's pivot must be in the same alignment as its parent's pivot, and all pivots in a chain of child-parent relationships must be aligned in the same direction. The child pivot location determines where the link is applied and the parent pivot location determines the link orientation and movement. For example, all pivots could have the Z direction pointing up or down. Use 
<span class = "ph uicontrol">Align Pivots</span> to copy pivot alignment between specified actors.
</span></div>
</div></li><li class = "li step stepexpand">In the Properties pane for a selected child or parent, assign the appropriate 
<span class = "ph uicontrol">Link type</span> (such as 
<span class = "ph uicontrol">Free</span> or 
<span class = "ph uicontrol">Linear</span>) and the axis. <div class = "itemgroup stepresult">Select 
<span class = "ph uicontrol">Show/Hide Degrees of Freedom</span> to see the direction of motion.</div></li><li class = "li step stepexpand">Optionally, select 
<span class = "ph uicontrol">Limited joints</span> and specify motion limits.</li><li class = "li step stepexpand">Select 
<span class = "ph uicontrol">Kinematic Free Dragging</span> and drag the actors to visualize their motions.</li></ol></section>
    
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