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Core Pin alignment

JCG87
Hello,

this is my first post and I just have a basic experience with CMM's and PC-DMIS. I am having a hard time figuring out how to align a core pin (see picture below). I have the .IGS model uploaded and I tried to align the part using a cone and a circle. Then I was trying to measure an inner diameter of the core pin the probe on the 3D model was in the correct position (height) but the physical probe way far from the core pin in the Z axis (height).So I guess there is an alignment problem. I used a cone because the outer section of the core pin have a 0'' 34' dft in the surface. Any suggestion how to align the core pin?
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  • The print requirements established that the origin is at the bottom/base of the core pin. I previously aligned the traditional plane/line/point alignment and the quick alignment but never with conical parts, so I I am kind of lost here.

    I use to get confused when a part has no clocking rotation. One thing to keep in mind pcdmis has never been a big fan of not full 6 degrees of freedom alignments. It has been known to cause floating nominals . I don't know in newer versions if this is the case. So in your example if there is nothing to clock to I would level the cylinder rotate a generic line for rotation about the level axis xy origin on cylinder and z origin bottom base.
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  • The print requirements established that the origin is at the bottom/base of the core pin. I previously aligned the traditional plane/line/point alignment and the quick alignment but never with conical parts, so I I am kind of lost here.

    I use to get confused when a part has no clocking rotation. One thing to keep in mind pcdmis has never been a big fan of not full 6 degrees of freedom alignments. It has been known to cause floating nominals . I don't know in newer versions if this is the case. So in your example if there is nothing to clock to I would level the cylinder rotate a generic line for rotation about the level axis xy origin on cylinder and z origin bottom base.
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