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Measures in two axes - help a rookie out

khve23
Please if anyone can help a rookie..
I basically got a romer arm handed to me, and I had to learn alot by myself. Alot do makes sense, but sometimes I get really confused though PC-DMIS is not very intuitive when something goes wrong.
Basically I am measuring a piece which is offset and also in two different axes. I have done this several times, getting the correct results according to the drawing. At first i measure a plane and circle to align the position, leveling out Z with the plane and connects the circle to XY. The plane measured in Z to align is also the plane i want a distance from to a hole measured in Y (I have to change the view to even get a full circle in the right axis). So I want a distance from Z to Y. The plane is level to earth (xD) and the hole you can physically see in Y. OK? So why.. when it is supposed to be 320mm +- 3mm nominal, I get 327 measured value? I have checked by measuring manually, and its 322mm - perfect..
My logic wants to think that to at all be able to get right result you have to see in Y axis. Logically you can't see the hole measured in Y from Z view.

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  • A B



    Unfortunately we cannot share any drawning, or snippet of the drawing due to company policies, so this is as good as it gets.. Look at my poorly done drawing made in paint...

    Picture A is "seen from" Y (the front), and B is seen from X (the side). What i want is the distance/height between the plane of the flange to center of the hole. As you can see on drw B, it is offset .. and I'm not sure if that has anything to do with it, but I have measured this before, and never had this problem. So I want to understand why this is happening, cause nothing in the system is telling me what the problem is.
    Please, if you don't understand this ridiculus drawing, let me have another try later.
Reply
  • A B



    Unfortunately we cannot share any drawning, or snippet of the drawing due to company policies, so this is as good as it gets.. Look at my poorly done drawing made in paint...

    Picture A is "seen from" Y (the front), and B is seen from X (the side). What i want is the distance/height between the plane of the flange to center of the hole. As you can see on drw B, it is offset .. and I'm not sure if that has anything to do with it, but I have measured this before, and never had this problem. So I want to understand why this is happening, cause nothing in the system is telling me what the problem is.
    Please, if you don't understand this ridiculus drawing, let me have another try later.
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