In this Question Line video, Jason answers the following question regarding True Position of an interrupted hole:
Can True Position be calculated using just one axis? Example: A hole drilled through both walls of a shaft or cylinder and there is a callout for True Position of .0005 to Datum A – which would be the center of a cylinder. Does True Position really apply? Its only asking for the holes to be in centerline?
Jason creates the above drawing showing this interrupted hole scenario and walks through two possible ways to control the position of the holes. One option treats the two holes as a single feature. The second option treats the two holes as separate features with simultaneous requirements.
As he walks through both options, Jason shows how the choice between “one feature” or “two features” changes how the axis and boundaries are interpreted. In the end, he brings it back to function – which option gives the most appropriate level of control for the functional requirements?
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