F4:Total Runout Validation
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Summary
F4 validates total runout against the ASME logic in the F4 Application and enforces datum, surface, modifier, and pattern rules.
Validation rules
- A primary datum reference is required; tertiary datum references are not allowed.
- Total runout is valid only for surfaces that surround or intersect the datum axis.
- Total runout cannot be applied to a pattern.
- FOS linkage is not allowed for total runout in F4.
- Prohibited modifiers: diameter, LMC, MMC, projected tolerance zone, unequally disposed.
- Tangent plane is only allowed when the surface intersects the datum axis.
Warnings and errors
F4 behavior
- Missing datum
Total runout requires a primary datum reference; missing datums are rejected.
F4 behavior
- Tertiary datum not allowed
Total runout cannot reference a tertiary datum.
F4 behavior
- Invalid surface application
Runout must be applied to a surface that surrounds or intersects the datum axis.
F4 behavior
- Pattern not allowed
Total runout applied to a pattern is rejected.
F4 behavior
- FOS linkage not allowed
Total runout must not be linked to a feature of size in F4.
F4 behavior
- Prohibited modifiers
Diameter, LMC, MMC, projected tolerance zone, and unequally disposed are not allowed on total runout.
Examples
- Valid: total runout applied to a surface surrounding the datum axis with datum A.
- Invalid: runout with a tertiary datum or pattern application.