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Getting accurate results from a small section of large radii

rke1229
We have a new part from a customer. It has a large radii (4.118) inch. I have a small section that I am able to measure. I'm having a lot of trouble getting repeatable results from the feature. I tried using the master option in advanced options then referencing that in the next cir feature. That didn't help. I know I can use fixed radii option but I would rather not do that. I read about a remeasure but I dont seem to have that option. I'm guessing that's an extra cost option.

Any help would be appreciated
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  • When you put your answer like that it seems so simple lol. I'm using 3d best fit alignment, the part doesn't have one straight edge. Do you think recalling the 3D B.F after measuring the radii and aligning to that will cause issues? Or should I just do a new 3D BF.

    Sounds like an iterative alignment might be another option.

    However, when creating the radius, measure it as a Fixed Radius, then align XY to that radius, then take a bunch of polar edge points and report the deviation.
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  • When you put your answer like that it seems so simple lol. I'm using 3d best fit alignment, the part doesn't have one straight edge. Do you think recalling the 3D B.F after measuring the radii and aligning to that will cause issues? Or should I just do a new 3D BF.

    Sounds like an iterative alignment might be another option.

    However, when creating the radius, measure it as a Fixed Radius, then align XY to that radius, then take a bunch of polar edge points and report the deviation.
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