GDT:Multi-Single Segment FCF: Difference between revisions
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Created page with "{{Author Credit |author=Admin }} {{GDT Infobox |symbol=Multi-Single Segment FCF |type=Multi-Segment |category=Multi-Segment |standard=ASME Y14.5 |author=Admin |datums=Per segment as required by the tolerance type |modifiers=Per segment; must follow the rules for each tolerance symbol |tolerance_zone=Multiple single-segment zones stacked in one feature control frame |image=<!-- TODO: add diagram file name --> |mistakes=Using composite rules..." |
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|modifiers=Per segment; must follow the rules for each tolerance symbol | |modifiers=Per segment; must follow the rules for each tolerance symbol | ||
|tolerance_zone=Multiple single-segment zones stacked in one feature control frame | |tolerance_zone=Multiple single-segment zones stacked in one feature control frame | ||
|image= | |image=GDT-Multi-Single-Segment-FCF.svg | ||
|mistakes=Using composite rules instead of MSS; repeating identical segments or datum frames; missing basic dimensions for position/profile; mixing incompatible modifiers | |mistakes=Using composite rules instead of MSS; repeating identical segments or datum frames; missing basic dimensions for position/profile; mixing incompatible modifiers | ||
|related=[[F4:Multi-Single Segment Validation]] | |related=[[F4:Multi-Single Segment Validation]] | ||
Latest revision as of 19:29, 15 January 2026
| Symbol | Multi-Single Segment FCF |
|---|---|
| Type | Multi-Segment |
| Category | Multi-Segment |
| Standard | ASME Y14.5 |
| Author | Admin |
| Datums | Per segment as required by the tolerance type |
| Modifiers | Per segment; must follow the rules for each tolerance symbol |
| Tolerance zone | Multiple single-segment zones stacked in one feature control frame |
| Image | GDT-Multi-Single-Segment-FCF.svg |
| Common mistakes | Using composite rules instead of MSS; repeating identical segments or datum frames; missing basic dimensions for position/profile; mixing incompatible modifiers |
| Related | F4:Multi-Single Segment Validation |
Summary
Multi-single segment (MSS) feature control frames stack two or more single-segment tolerances to apply multiple requirements to the same feature or pattern.
Definition
An MSS FCF contains two or more single segments, each a separate requirement. Segments can reference different datum frames and may use different tolerance symbols. MSS is not the same as a composite FCF.
When to use it
Use MSS when a feature must satisfy multiple independent requirements, such as different functional datum frames or different tolerance symbols.
Examples
Example: Two MSS segments with different datum frames
An MSS frame applies two independent requirements with different datums to the same feature.
Example: MSS with mixed tolerance symbols
Two segments apply different symbols to the same feature when each requirement must be evaluated separately.
Common mistakes
- Treating MSS as a composite FCF.
- Repeating the same datum reference set across segments.
- Missing basic dimensions for position or profile requirements.
- Using modifiers that are not permitted for a given segment.