Defining a Mechanism

Mechanism Manager allows you to set up a mechanism by specifying which product engineering connections are enforced and which degrees of freedom are controlled by mechanism commands.


Before you begin: Define a mechanism as current and select it.
  1. Under Status, indicate the Computation status used to calculate the degrees of freedom in the mechanism:
    OptionDescription
    Automatic Recalculates the degrees of freedom each time you add or remove connections and commands. Use this mode for small mechanisms.
    Manual Recalculates the degrees of freedom manually to avoid performing a time-consuming calculation each time you change a connection or a command.
  2. Select the joints to include or to exclude from the mechanism:
    • To include an engineering connection as a joint, select it in the table and click Include.
    • To exclude a joint, highlight it in the table and click Exclude.
    • To include every available engineering connection as joints in the mechanism, click Include All.
    • To exclude every available joint from the mechanism, click Exclude All.
  3. To change a command in the mechanism:
    1. Select an engineering connection including a controlled constraint.
    2. Under Command Management, specify the Length or Angle. The label in the appropriate Command column changes to reflect the type of command assigned to the joint.
  4. To reverse the sense of motion of a command, modify the command value parameters:
    1. To edit an engineering connection that is specified as a command, right-click the command in the tree and select Edit Connection.
    2. In the Engineering Connection Definition dialog box, right-click the controlled constraint and change the type of the first option.
    3. Specify the new parameter value manually in the Engineering Connection Definition dialog box.
  5. Repeat Steps 2 and 3 until the status icon in the Mechanism Manager turns green and a message indicates that the mechanism can be simulated.
  6. To assemble mechanisms, click the Assembly tab.
  7. Click OK.

Tip: To edit a dressup, double-click a Dressup node in the tree.