3DDave
Aerospace
- May 23, 2013
- 11,211
Anyone have an errata sheet for ASME Y14.5 - 2009? I didn't see one on the ASME sales site.
I've started collecting errors, mostly from trying to diagram the definitions of datums and datum related terms that are scattered about. For example, 'True geometric counterpart' is supposed to have been eliminated between the '1994 version and the '2009 version, replaced by the term 'datum feature simulator' (A.6.5) but still is used in 4.16.5 and 3.3.3, but not defined elsewhere in the body of the standard.
Another are the borked cylindricity symbols back in Fig C-6.
Still not sure what distinguishes a Datum (1.3.13) from a Theoretical Datum (4.6) since a Datum is already defined as theoretical in nature. Word substitution would result in a Theoretical Theoretically Exact Point, Axis, Line, ...
I've started collecting errors, mostly from trying to diagram the definitions of datums and datum related terms that are scattered about. For example, 'True geometric counterpart' is supposed to have been eliminated between the '1994 version and the '2009 version, replaced by the term 'datum feature simulator' (A.6.5) but still is used in 4.16.5 and 3.3.3, but not defined elsewhere in the body of the standard.
Another are the borked cylindricity symbols back in Fig C-6.
Still not sure what distinguishes a Datum (1.3.13) from a Theoretical Datum (4.6) since a Datum is already defined as theoretical in nature. Word substitution would result in a Theoretical Theoretically Exact Point, Axis, Line, ...
