The question I have about MMC and Datums is as follows
Setup Example
An MMC tolerance is placed on datum B.
An MMC tolerance is applied to a pattern of holes and then MMC applied to Datum B.
Is this statement correct?
When a datum is referenced at MMC and it fails its size tolerance, any tolerance that references the datum is set to status FAIL and the tolerance is re-analyzed as if the tolerance references the datum at RFS.
In some cases, this will cause the tolerance referencing the failed datum to show a deviation within tolerance.
This indicates that the position of the tolerances features is actually OK, but the tolerances fails strictly based on the failures of the datums.
Is this statement correct?
Or should the pattern of holes PASS even though the datum has failed?
What, if any differences will the standards make, as both ISO and ASME are used, (not on the same part thought!!)
Setup Example
An MMC tolerance is placed on datum B.
An MMC tolerance is applied to a pattern of holes and then MMC applied to Datum B.
Is this statement correct?
When a datum is referenced at MMC and it fails its size tolerance, any tolerance that references the datum is set to status FAIL and the tolerance is re-analyzed as if the tolerance references the datum at RFS.
In some cases, this will cause the tolerance referencing the failed datum to show a deviation within tolerance.
This indicates that the position of the tolerances features is actually OK, but the tolerances fails strictly based on the failures of the datums.
Is this statement correct?
Or should the pattern of holes PASS even though the datum has failed?
What, if any differences will the standards make, as both ISO and ASME are used, (not on the same part thought!!)