AME Vs UAME

[Sa-Ro]

Hi

Does actual mating envelope (AME) and unrelated actual mating envelope (UAME) are same?

Because both are measuring the smallest size for external feature and largest size for internal feature without constrained to datums.

 

[Tarator]

Sa-Ro,

No, they are not the same. Unrelated AME comes from the feature. Related AME comes from the FCF and its datums. For instance, imagine a feature of size with a Position and Perpendicularity callouts. You would have 1 UAME, and 2 RAMEs (1 for Position, and 1 for Perpendicularity).

 

[Sa-Ro]

Kindly check my doubt.

It is for AME Vs UAME.

NOT for UAME Vs RAME.

 

[Tarator]

AME is either Unrelated or Related... AME may be used instead of UAME for short, depending on the context.

 

[Sa-Ro]

Thank you.

 

[chez311]

Sa-Ro,

Often when someone (or the standard) refers to simply the AME or actual mating envelope they mean the UAME (unrelated actual mating envelope) and are used interchangeably, but they should really be more specific and use the full term UAME if that is what they mean.

As mentioned above the UAME is UNRELATED to any datum features. The RAME is of course different and is RELATED in orientation and if applicable, location to the datum features specified in an FCF.

 

[Sa-Ro]

Thank you