Support for GD&T composite FCFs and modifiers

Composite feature control frames (FCFs)

Composite FCFs consist of two or more feature control frames tied to a single feature, or to a pattern of multiple features of the same type. The example below applies a diameter tolerance to the positions of four holes (4X), relative to datums A, B, and C.

Note

You or your administrator must set the value of the preference Mci0ExtractPatternPMI to true to extract a GD&T callout for multiple features associated to the same callout, as defined by a pattern (for example, 4X below). If the preference is set to the default value of false, only a single callout is extracted. This preference also applies to composite linear dimensions.

Below is an example of a composite surface profile tolerance. Many web sites contain more detailed information on GD&T and composite FCFs.

Note

Composite FCF refinements, such as a third FCF that defines parallelism or perpendicularity tolerances for a pattern of holes, are not supported.

Like NX, Teamcenter uses a simple numbering sequence for each composite FCF. NX uses, for example, 11 and 11_1 to indicate FCFs that make up a composite FCF top to bottom, while Teamcenter uses 11 and 11.1 in the PMI ID column to show that these two FCFs are related to the same feature. The PMI Is Composite FCF column also displays a 1 to indicate that an FCF is part of a composite.

Note

• When consuming composite FCFs in an operation—for example from a Product view to a Process view—you must press Ctrl and select all composite FCFs in the Product view before you copy and paste them to the Process view.

• To remove a composite FCF from an operation, you must also select both parts.

• You cannot assign one part of a composite FCF to one operation and the other to a different operation.

Modifiers

Modifiers added to tolerances and datums are extracted from JT files in relation to their tolerance and/or datum. The most common modifiers are for maximum material condition (MMC) and for least material condition (LMC). Supported modifiers are defined below.

Modifier symbol	Description
	Maximum material condition
	Least material condition
	Free state
	Tangent plane
	Projected
	Unilateral
	Regardless of feature size (RFS, discontinued after Y14.5, 1994)