I have been tasked with explaining some items concerning a program I inherited concerning Xactmeasure Profile. I have a two part question. Attached is a pic of the profile dimension results and the D datum results. First, the call out is |Profile|0.010|A|D(M)|B|. A is a plane, D is an intersect of a cylinder and plane (constructed circle for size) and B is a line. The attached results show the D Datum size at 0.4683 and the nominal at 0.472. I am trying to figure out the Bonus of 0.0113. Is it the bonus of the feature plus it's position tolerance, see second attachment? I have looked over 2.8, 4.11.5, 4.16.2, 4.16.4 & 4.17 and now my head hurts. This one I am confused as the standard shows the other way around, Datum is profile and feature is position.Second, if datum A is zplus and B is in the X direction, why whould I have a Y shift? Please let me know if you need more info. My previous job only used legacy reporting and this one has a lot of parts utilizing this boundary condition.
Thanks for the input. I understand the TP bonus, it was the profile bonus I couldn't figure out. Now after comparing more results I have found what's happening. Here is the low down: 0.472 (Nom) + 0.005 (Up Tol) = 0.477 - 0.4683 = 0.0087 (dev), 0.0113 (profile bonus) - 0.0087 = 0.0026. The 0.0026 is double the 0.472 bonus from the TP dimension. This is consistant with 5 samples I have reviewed. Still open on my second question about the Y axis displacement of the profile.
Thanks for the input. I understand the TP bonus, it was the profile bonus I couldn't figure out. Now after comparing more results I have found what's happening. Here is the low down: 0.472 (Nom) + 0.005 (Up Tol) = 0.477 - 0.4683 = 0.0087 (dev), 0.0113 (profile bonus) - 0.0087 = 0.0026. The 0.0026 is double the 0.472 bonus from the TP dimension. This is consistant with 5 samples I have reviewed. Still open on my second question about the Y axis displacement of the profile.
