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Center axis as a datum not repeat

browningdmis
So here is what my opportunity for the day is.

Got a part with a lager Id bore that is datum b. Going into the part morr is a smaller bore with a position of .003 to b.

So my fcf used the drf to control it. Well the report does not show x and z as zeros. Engineering says datum b is zero so the report has to show everything as zero. So I did an alignment using just datum b( center line of the cylinder) the report show zeros but bad position and does not repeat. What am I missing

2023.1 geotol 9.15.8 global chrome
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  • Little confused the drawing posted has datum B as the 1.125 diameter and estimate 2 inch long, the code is showing datum B as 1.375 diameter length 0.36 with depth and end offset that reduce the cylinder length to 0.222.

    Ignoring that it appears the wrong cylinder is being used as datum B the length of the cylinder and the number of hits used will not create a stable axis.
  • in reply to UKCMM
    PCDMIS does fine with correct information just remember garbage in garbage out, if you are still using short cylinder lengths that is what you will get and has nothing to do with the software but your incorrect measurement strategy.

    6 points for datum B can never be enough to assess the cylindricity requirement or be confident that the bore is the correct size.

    Maybe post your corrected code then we might be able to work out the problem.
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  • in reply to UKCMM
    PCDMIS does fine with correct information just remember garbage in garbage out, if you are still using short cylinder lengths that is what you will get and has nothing to do with the software but your incorrect measurement strategy.

    6 points for datum B can never be enough to assess the cylindricity requirement or be confident that the bore is the correct size.

    Maybe post your corrected code then we might be able to work out the problem.
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