Using Parameters in Relations
You can drive Measure step and probe parameters by other parameters or dimensions in the reference part, or the CMM assembly, by using relations. Both the parameters with numeric and string values can be included in relations.
You can add relations using the Edit Parameters dialog box. To add a relation, type the relation in the value option cell for a particular parameter or in the input field above the parameter list. Parameter values driven by a relation are preceded by an equals to (=) sign.
You can define complex relations in the Relations dialog box, that appears when you click on the Edit Parameters dialog box. The Relations dialog box lists existing relations. You can add feature relations to the list.
The step parameter syntax is:
PARAM_NAME:FID_#
where:
PARAM_NAME—the parameter name,
#—the internal feature ID of the Measure Step. This is not mandatory.
Example:
APPROACH_DISTANCE:FID_22 = d6:1 * 0.1
The probe parameter syntax is:
PARAM_NAME:TID_ID
where:
PARAM_NAME—the parameter name,
ID—the TOOL_ID.
* 
The parameter is considered for the probe for the current step if you do not specify TOOL_ID.
Example:
BORDER_CLEARANCE:FID_22 = TIP1_DIAMETER:TID_ROT1 * 0.5
If a parameter is driven by relation, the system puts a note next to it in the parameters file. If you modify a relation-driven parameter, its value will be reset upon regeneration.
The options in the Relations dialog box (Show > Info > Tools and Show > Info > Steps) are accessible in CMM mode and facilitate using probe and step parameters in relations. They display parameters (including ID) for a selected probe or Measure step, respectively.
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