ASME Y14.5-2009 Errata sheet?
ASME Y14.5-2009 Errata sheet?
(OP)
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, ...





RE: ASME Y14.5-2009 Errata sheet?
Chris, CSWA
SolidWorks '15
SolidWorks Legion
RE: ASME Y14.5-2009 Errata sheet?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: ASME Y14.5-2009 Errata sheet?
RE: ASME Y14.5-2009 Errata sheet?
RE: ASME Y14.5-2009 Errata sheet?
tolerance: the total amount a specific dimension is permitted to vary. The tolerance is the difference between the maximum and minimum limits.
How does this definition fit in with a positional tolerance in which there may be no dimension or may be multiple dimensions involved locating a feature? There aren't really maximum and minimum limits that a positional tolerance depends on.
Suggested definition: the amount of variation that is acceptable in the finished product and expressed directly within dimensions or by using feature control frames. The value may be expressed as a single value, as a pair of limiting values, or be embedded as pre-calculated limit dimensions.
RE: ASME Y14.5-2009 Errata sheet?
It isn't a symbol as much as a notation on extension lines. This observation is supported in 4-24.13 where no mention is made of such a symbol that is in a diagram that is supposed to exemplify the symbol.
Mentioned in:
1) Figure 4-1 and 4-2 per 3.3.30 Datum Reference Frame Symbol
2) Figure 4-54 per 4.24.1 Datum Target Symbols
The notation appears in figures 4-7, 4-8, 4-28 4-42, 4-43, 4-44, 4-45, 4-46, 4-47. The notation is subsequently referenced only in figures 4-45 and 4-46 where modifiers depend on knowing the orientation of a coordinate system. In the other cases it is either not used or redundant to the coordinate system in the related computer based model where it provides possible conflict between the drawing and model.
Errata: in Figure 4-28 the direction of the x-axis changes from the 'this' to the 'means this' segment, making the 'means this' a left hand coordinate system while the 'this' segment is right handed.
RE: ASME Y14.5-2009 Errata sheet?
RE: ASME Y14.5-2009 Errata sheet?
To accomplish this it is becoming increasingly important that the use of geometric and dimensioning (GD&T) replace the former limit dimensioning for form, orientation, location, and profile of part features.
RE: ASME Y14.5-2009 Errata sheet?
RE: ASME Y14.5-2009 Errata sheet?
???
John Acosta, GDTP Senior Level
Manufacturing Engineering Tech
SSG, U.S. Army
Taji, Iraq OIF II
RE: ASME Y14.5-2009 Errata sheet?
Yes, in the court of law, what’s matter, has relevance, substance and importance is the text only and not the pictures.
RE: ASME Y14.5-2009 Errata sheet?
Does it mean that GD&T symbology is not defendable and only verbal notes have power?
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: ASME Y14.5-2009 Errata sheet?
_________________________________________
NX8.0, Solidworks 2014, AutoCAD, Enovia V5
RE: ASME Y14.5-2009 Errata sheet?
RE: ASME Y14.5-2009 Errata sheet?
a, b, c, or d?
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: ASME Y14.5-2009 Errata sheet?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: ASME Y14.5-2009 Errata sheet?
"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future
RE: ASME Y14.5-2009 Errata sheet?
Perhaps that's the largest running errata of all - placing captions ahead of what they caption. It's a development new to the '-2009 version.
RE: ASME Y14.5-2009 Errata sheet?
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: ASME Y14.5-2009 Errata sheet?
Same for paragraphs 1.3.32 and 1.3.33.
Same for paragraphs 1.3.30 and 1.3.31.
Same for paragraphs 1.3.57 and 1.3.58.
Paragraph 1.3.37 should go before 1.3.35.
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems