Contoured Datum : Fig 4-29 of 2009 Std
Contoured Datum : Fig 4-29 of 2009 Std
(OP)
Hi,
I am referring to figure 4-29 of ASME Y14.5-2009 standard.
Could anyone help me to understand the concept clearly.
1) The datum feature "B" is a semicircular surface (feature). Since there is no opposed surface to this, it is not a feature of size, But in fig (b) Datum B is identified with Max Material modifier. Can the "M" modifier be identified to datum feature "B" since it is not a FOS.
2) What is datum feature "B" here? Is it the Axis?
Is it the axis derived from AME of datum feature "B"?
I am referring to figure 4-29 of ASME Y14.5-2009 standard.
Could anyone help me to understand the concept clearly.
1) The datum feature "B" is a semicircular surface (feature). Since there is no opposed surface to this, it is not a feature of size, But in fig (b) Datum B is identified with Max Material modifier. Can the "M" modifier be identified to datum feature "B" since it is not a FOS.
2) What is datum feature "B" here? Is it the Axis?
Is it the axis derived from AME of datum feature "B"?





RE: Contoured Datum : Fig 4-29 of 2009 Std
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Contoured Datum : Fig 4-29 of 2009 Std