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same piece varying concentricity

hey guys! I'm having trouble validating a measurement method. I am finding different values ​​of concentricity between two diameters. We have already tested leveling in different work planes and positions and the values ​​do not match when compared. in DCC mode I am always creating a plane and a cylinder, where I level and give origin to the cylinder and the plane is my height reference. In this cylinder that I level, I measure three diameters and after measuring them, I measure another larger diameter that is about 20mm away from them and I make the concentricity between them.depending on whether I place the piece lying down or standing up, changing my work plane, my concentricity varies from 0.070mm to 0.200mm. what do you think it could be?
Parents
  • What is the size of the cylinder ? (diameter ; length) How many hits ?
    Do you measure the larger diameter as a circle or as a cylinder ? If the datum is the cylinder axis, then you should measure the larger diameter as a cylinder (coaxiality).
    You measure 3 diameters in the cylinder : are they concentric to the cylinder axis at the same height ?
    As said, post the code...
Reply
  • What is the size of the cylinder ? (diameter ; length) How many hits ?
    Do you measure the larger diameter as a circle or as a cylinder ? If the datum is the cylinder axis, then you should measure the larger diameter as a cylinder (coaxiality).
    You measure 3 diameters in the cylinder : are they concentric to the cylinder axis at the same height ?
    As said, post the code...
Children
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