Tolerance Dialog Box

You can use the Tolerance dialog box to define and edit DimXpert geometric tolerances. When you use the Tolerance dialog box from DimXpert, the software offers these filters and checks, per the active drawing standard.

To open this dialog box:

Click Geometric Tolerance (MBD Dimension toolbar) or Tools > MBD Dimension > Geometric Tolerance.

Property Filters and Check
Symbol Check: The software checks to ensure the geometric characteristic and feature combination is valid. An error occurs if the combination is invalid, for example, if you apply Flatness when the toleranced feature is a Boss.
Tolerance Zone Shape Filters: The software filters the options based on the selected geometric characteristic. For example, the options are enabled for Position tolerances and disabled for Circularity tolerances.

Check: The software checks to ensure the tolerance zone and feature combination is valid. An error occurs if the combination is invalid, for example, if you apply a diameter symbol when the toleranced feature is a plane.

Material Condition Modifier Filters: The software filters the options based on the selected geometric characteristic. For example, the options are enabled for Position and disabled for Runout.

Checks:

  • The software checks to ensure the maximum material condition (MMC) and least material condition (LMC) symbols are applied only when the toleranced feature is a feature of size. An error occurs when the feature is not a feature of size, for example, when the feature is a pocket.
  • The software checks to ensure a size tolerance is applied to the toleranced feature when you specify MMC or LMC. An error occurs when a size tolerance does not exist.
Projected Tolerance Zone Filters: The software filters the options based on the selected geometric characteristic. For example, the options are enabled for Position and disabled for Concentricity.

Checks:

  • The software checks to ensure the toleranced feature supports a projected tolerance zone. An error occurs if the feature does not. For example, if you apply a projected tolerance zone when the feature is a plane (ISO).
  • The software checks to ensure the toleranced feature supports a projected tolerance zone. An error occurs if the feature does not. For example, if you apply a projected tolerance zone when the feature is a plane (ISO).
Unit Basis Tolerance Check: The software checks to ensure the format used for the per unit area or per unit length criteria is valid. An error occurs when the format is not recognized.
Tolerance 2 Check: The software checks to ensure the format of the input, tolerance value followed by “MAX”, is valid. An error occurs when the format is not recognized.
Primary, Secondary, and Tertiary Datum Filters:
  • The software filters the datum options based on the selected geometric characteristic. For example, the options are enabled for Position and disabled for Flatness.
  • The software filters the options for the material condition modifiers based on the selected geometric characteristic. For example, the options are enabled for Position and disabled for Runout.

Checks:

  • The software checks to ensure the entered datum label is the label of an existing datum. An error occurs when it is not.
  • The software checks to ensure MMC and LMC symbols are only applied when the datum feature is a feature of size. An error occurs when the feature is not a feature of size, for example, when the feature is a plane.
  • The software checks to ensure the datums define a valid datum reference frame based on the rules specified by ASME Y14.5.1M. An error occurs for nonconforming datum sets, for example, if the primary and secondary datums are two parallel planes.
Composite Frame Check: When you specify datums, the software checks to ensure the datums specified in the lower tier are entered in the same order of precedence as the upper tier. An error occurs if the datums do not repeat, for example, if the primary datum in the upper tier is “A,” but “B” is entered as primary in the lower tier.