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A Glossary		 [Van]
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components

[Figure 3] [Figure 4]

[Figure 5]
The components that make up the
assembly of the van (not to the same scale)


An assembly is made up from a number of component designs.

constraint

[Figure 6]
The axle has been constrained to lie
on the same axis as the hole in the body.
The axle can only slide in and out of the body.


A constraint is a rule that an element of a sketch or a component has to obey.When creating a rectangular sketch a constraint is automatically applied to keep the sides at right angles to each other.In an assembly the axis of a spindle may be constrained to lie on the axis of a pulley wheel through which it passes. If either the spindle or the pulley are moved the other must also move to ensure the rule is obeyed.The length of an edge may be constrained to be a certain size. It is important that a constraint of this type is not confused with a dimension. A constraint controls the length of a feature whereas a dimension simply provides information about the size of the feature. The two may look similar on screen but behave in very different ways.Only constraints are available in designs but both constraints and dimensions are available in drawings.

design

[Figure 5]
A design for a wheel


A ‘design’ in Pro/DESKTOP is the three dimensional representation of your idea that you create on screen. Creating ‘designs’ is what Pro/DESKTOP is about. See also drawing.
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© CBI, 1999 Last Updated: 13/08/98