Dimension
Dimension constraints set the dimensions of elements in the master part to specific values. SOLVE will attempt to adjust constrained dimensions to the values given by the constraint. If this proves impossible, the solve fails.
To assign Dimension constraints:
1. Select ASSIGN on MENU 2.
2. Select type Dimension.
3. Pick on the text of the dimension to be constrained.
4. Choose a value for the constraint. You have three options:
◦ Press END or select another dimension. The actual value of the constrained dimension at solve time will be assigned to the constraint. This dimension will not change in the variation.
◦ Enter a specific value for the dimension. The dimension is adjusted to this value at solve time.
◦ Enter a parameter name or Creo Elements/Direct Drafting expression that resolves to the dimension value (string input). The dimension is adjusted to the result of the expression.
Dimension constraints are not identified by icons, but rather by a change to the dimension text and color. Depending on how you define the dimensional constraint, one of three displays will result at definition time and when you select SHOW Dimension or SHOW All Types:
• Dimensions that are constrained to keep their current value during the solve are redrawn in the current icon color (CYAN by default).
• Dimensions that are constrained to a given value are redrawn in the current icon color (CYAN) and the main dimension text is replaced by the value given to the constraint.
• Dimensions that are given a parametric value are redrawn in the current icon color (CYAN) and the main dimension text is replaced by the parameter name, which is drawn using the dimension's font.
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An alternate display style for dimensional constraints can be specified by calling PD_SHOW_USE_POSTFIX YES, either from the Creo Elements/Direct Drafting command line or via the \drafting\pd_def file. This option causes the parameter value to be written as a postfix to the main dimension text, which remains unchanged, as shown in following figure. Both the dimension text and postfix are redrawn in the current icon color (CYAN), to indicate that a dimensional constraint has been applied. The Parametric Design postfixes do not interfere with Creo Elements/Direct Drafting dimension postfixes, if present.
Dimension Constraints, Alternate Style  You cannot assign a dimension constraint to symmetric SINGLE or symmetric DATUM LONG dimensions. |