Use the Automatic option to enable Creo Parametric to determine
the constraint type based on selections and component location
• Assemble components using
– Typically the system
generates a Coincident
• Toggle or create other
constraints as necessary.
– Offset, Angle Offset,
and so on.
Assembling using Automatic
Figure 2 – Creating an Angle Offset
Constraint Based on Orientation
When you assemble a component, the default Constraint Type is Automatic
. With the Automatic option, the system automatically determines the
constraint type that is created when you select a reference pair. The following
items influence the constraint type that is created:
• The references selected – The references you select can automatically
eliminate a particular constraint type that can be created.
• The component’s location – In Figure 1, the component is located above
the area it is to be assembled to when references are selected; therefore, a
Distance constraint is created. If the component is located along the side
at approximately the same height as its desired final placement location
when references are selected, the system creates a Coincident constraint.
• The component’s orientation – In Figure 2, the component is oriented in
such a way that the selected references face at an angle to each other and
are not coplanar; therefore, the system automatically creates an Angle
In between the creation of constraints, you can further reorient the component
to refine its position. This can help the system more accurately determine the
next constraint type and offset, or it may help you easily select the next set of
references. Of course, the created constraints dictate how the component
When you select a reference pair, the system automatically creates a
constraint. At this point, the system usually waits for you to select a second
reference pair to create a second constraint. The system automatically keeps
creating new constraints until the component is Fully Constrained.
Right-Click Menu Options
When assembling components, there are various right-click menu options
available to increase your speed and efficiency, including the following:
• New Constraint – Useful when you need to create additional constraints
above what the system minimally requires.
• Clear – Clears the references specified for the currently active constraint.
Assemble components using Automatic . The system typically generates
a Coincident constraint from the specified references. You can then toggle,
or create as necessary, the Offset, Angle Offset, Coincident, Centered, and
so on, Constraint Types. The Centered constraint lines up spheres, cones,
tori, or cylinders with no Flip option