Measure type relations are defined through values you measure in your current Creo Elements/Direct Modeling session. The measurement output is returned in a separate window. If you move any of the parts referenced by a measurement, the measured value is updated automatically. Also, if you change the unit of measurement, the measured value is adjusted automatically. Each measurement is saved under a unique name.
Click Relations and then, in the Create & Modify group, click Measure. The Measure dialog box opens. Select the elements to measure relation.
You can use the following measurement types:
• Distance: Measure the distance between any 3D vertices, edges, or faces.
• Angle: Measure the angle between 2D or 3D edges or faces.
• Length: Measure the length of any 2D or 3D edge (line, circle, ellipse).
• Radius: Measure the radius of any circle, ellipse, cylinder, sphere, or torus. For ellipses and tori, both the major and the minor radius are returned.
You can use these measurements as terms in expressions of distance or angle relations or in variables.
Creo Elements/Direct Modeling evaluates and updates measure relations within an assembly relation set when using positioning and animations. The evaluation is not available for physical movements, and is restricted to one level of dependency. That is, the update is delayed by one step if a measure relation relies on the evaluation of another measure relation.
Neither Stop at clash nor the 3D CoPilot Show setting Clash is evaluated for parts moved indirectly viameasure relations. If an indirectly moved part clashes, Creo Elements/Direct Modeling recognizes no further clashes.
Distance measurement
Use the Distance measurement function to measure the distance between 2D or 3D vertices or edges or faces. Note the following restrictions when measuring the distance between non-parallel planes or lines:
• You cannot use the Distance measurement function to measure a distance between non-parallel planes or non-parallel lines.
• If referenced planes or lines become non-parallel when a relation is solved, the associated measured value is automatically deactivated by the system.
• If you reposition referenced planes or lines such that they become non-parallel, the associated measured value is automatically deactivated by the system.
• If referenced non-parallel planes or lines become parallel when a relation is solved, any associated system-deactivated measured value becomes active.
Angle measurement
Use the Angle measurement function to measure the angle between 2D or 3D edges or 3D faces. The measured value is positive or negative, depending on the sequence in which you select the two reference elements.
If you are creating an angular relation and you wish to use an angle greater than 180 degree, there can be multiple solutions unless the angle is defined within a plane. To prevent this, you can define your angle as Planar (the default), in which case you must also specify the plane onto which you wish to project the reference elements.
To specify an angle as planar:
1. Click the Dir Element checkbox.
2. Click on a reference element in the viewport which has an axis or direction, for example, a cylinder, plane or circle.
This direction is taken as the normal to a plane on which reference elements 1 and 2 are projected for measurement of the angle between them.
The specified element becomes reference element 3 in the definition.
Length measurement
Use the Length measurement function to measure the total length of the following 3D edge types:
• Line (2D and 3D)
• Circle (2D and 3D)
• Ellipse (3D)
Radius measurement
Use the Radius measurement function to measure the radius of the following 3D edge types:
• Circle (2D and 3D)
• Ellipse (3D)
and of the following 3D face types:
• Cylinder
• Sphere
• Torus
For ellipses and tori, you can measure either the major or the minor radius.
Measure. The Measure dialog box opens. Select the elements to measure relation.