After Link to PMI for the ordinate dimension is executed, the nominal value of
coordinate tolerance becomes positive even though the dimension exists in the
negative position of PCS.
Solution
NX CMM takes its nominal value directly from the PMI; that is it treats the PMI
values as the master. The lock symbol next to the values are a clue to what is
going on. The lock circled below indicates that this value comes from the PMI.
In the model if the value of the nominal is positive for both ordinate
tolerances , LinkPMI forces the nominal value to be positive.
If the requirement is to get the signed locations (+ve , -ve) we need to change
this parameter in the PMI ordinate dimensions. The way it is set, all
directions are positive, meaning that there will be no negative values.
If we change the Positive Direction to User Defined and create dimension will give desired result while executing Link PMI.
Notes and References
Hardware/Software Configuration
Platform: all
OS: n/a
OS Version: n/a
Product: NX
Application: CMM_INSPECTION
Version: V1847
Function: LINKPMI
Ref: 002-7009466