Expand description
Feature control frame (FCF): a geometric tolerance on a face or edge —
characteristic, tolerance zone (⌀, material condition) and up to three
datum references, validated against the part’s datum registry.
All fourteen ASME Y14.5-2009 characteristics are offered: AP242 defines an entity for each (concentricity and symmetry included, which Y14.5-2018 retired) and the export target is the schema, not one drawing standard.
Structs§
- Characteristic
- One geometric characteristic: id, symbol, label, its AP242 entity and its datum rule.
Enums§
- Datum
Rule - How many datum references a characteristic takes.
Constants§
Functions§
- characteristic
- characteristic_
for_ entity - The characteristic behind an AP242 entity keyword.
- datum_
references - The datum reference cells
(letter, modifier)an annotation declares, in order, empty letters skipped. - modifier_
symbol - The material-condition modifier glyph (
Ⓜ/Ⓛ), empty for none.