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Part alignment

bogii

Hello everyone,

We are having trouble measuring the part. There are big diferences between our and customer's measurements. The customer is using PolyWorks.

I received point coordinates for plane A (5 points) and B (6 points) from a customer (see picture below). For Plane B he also wrote "the plane is on the cylinder with Ø3,5m and we made a plane with 6 points"

How to do iterative alignment correctly?

My alignments:

Many thanks.

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  • in reply to bogii

    Do you have the CAD model, and if you do, where is it's co-ordinate system origin when you import it?  As others have said, those XYZ values look like car body co-ordinates.  Usually, for parts like this, the CAD is also supplied in car body co-ordinates which allows you to simply import it and then add auto-vector or auto-surface points, typing in the XYZ values shown.  After typing in the XYZ values, there is a button you can click to find the corresponding vector for each point before creating.

  • in reply to Neil Challinor

    Totally agree. When you start your program with point hits for  iterative alignment, you need not only the XYZ values of the points, but also the corresponding vectors, otherwise the CMM could not get the right compensation for each hit, which means not accurate.   

     

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