J
Hi All,
I had a question about the following angularity callout on a recent print (see attached). My question is if this is the correct way to describe this tolerance zone with an angularity fcf or should it be a composite profile fcf. im leaning toward the composite profile but would like some feedback from the guru's.
Thannks for any help you could offer.
Jim
The customers intent for the profile / angularity call out is as follows ,
Profile:
The intention of the profile tolerance is to locate the interfacing surface of the marmon flange. This surface can move +/-0.25mm perpendicularly to the 20 degree plane starting from a point defined as 35mm from the axis of Datum B and 4.58mm from Datum A. Utilizing triginometry, we find that this corresponds to a "horizontal" movement of +/- 0.235mm. When transposing an angle of 20 degrees on detail Y at a distance of 4.345mm and 4.815mm from Datum A, the surface should not break this plane to satisfy the profile dimension.
Angularity:
The intention of the angularity dimensions is further specify the limits of the surface as a 20 degree angle with respect to Datum A. This angularity tolerance can be summarized as a tighter profile tolerance of +/-0.075 that must fall within the wider profile tolerance specified previously. This tolerance zone is also perpendicular to the surface and corresponds to a total allowable "horizontal" movement of 0.141mm.
I had a question about the following angularity callout on a recent print (see attached). My question is if this is the correct way to describe this tolerance zone with an angularity fcf or should it be a composite profile fcf. im leaning toward the composite profile but would like some feedback from the guru's.
Thannks for any help you could offer.
Jim
The customers intent for the profile / angularity call out is as follows ,
Profile:
The intention of the profile tolerance is to locate the interfacing surface of the marmon flange. This surface can move +/-0.25mm perpendicularly to the 20 degree plane starting from a point defined as 35mm from the axis of Datum B and 4.58mm from Datum A. Utilizing triginometry, we find that this corresponds to a "horizontal" movement of +/- 0.235mm. When transposing an angle of 20 degrees on detail Y at a distance of 4.345mm and 4.815mm from Datum A, the surface should not break this plane to satisfy the profile dimension.
Angularity:
The intention of the angularity dimensions is further specify the limits of the surface as a 20 degree angle with respect to Datum A. This angularity tolerance can be summarized as a tighter profile tolerance of +/-0.075 that must fall within the wider profile tolerance specified previously. This tolerance zone is also perpendicular to the surface and corresponds to a total allowable "horizontal" movement of 0.141mm.
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