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help me measure it, how would u dimension it

pcdmisstudent
hi all
i got a measuring/construction/engineer/noob problem.
i have this small 40 degree, 2 degree conical thing, that is supposed to have a diameter 6.86mm where it is as smallest, and its supposed to be centered in the casted hole(D), and perpendicular to the plane(A)
i dont know how to measure it, since its a very small surface, and its also not cylindrical, its conical with a 2degree angle.
so i have to measure it as a cone. and then construct a circle using cone feature, but the results are very unsure.

the matching part has the exact same feature, except its internal, and it should run free over the tap thingy.
how can i measure it
or how would u else dimension it, so that the matching part fits.
ty all, thanks for ur feedback
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  • Are you working under 2011 or 2019 ?
    I'm not at the cmm, so I'm not sur of what you can do :
    If you created fixed rad circles, you know now 2 centers and 2 radii, so you can create 3 generic points/circle, and then construct the cone from them : 
    ASSIGN/V1=CIRC1.XYZ
ASSIGN/V2=CIRC1.R
ASSIGN/V3=CIRC1.NUMHITS
ASSIGN/V4=ROUND(V3/2)
ASSIGN/V5A=UNIT(CIRC1.HIT[1].XYZ-CIRC1.XYZ)
ASSIGN/V5B=UNIT(CIRC1.HIT[V4].XYZ-CIRC1.XYZ)
ASSIGN/V5C=UNIT(CIRC1.HIT[V3].XYZ-CIRC1.XYZ)
PT1 =GENERIC/POINT,DEPENDENT,CARTESIAN,$
NOM/XYZ,<V1.X+V2*V5A.I,V1.Y+V2*V5A.J,V1.Z+V2*V5A.K>,$
MEAS/XYZ,<V1.X+V2*V5A.I,V1.Y+V2*V5A.J,V1.Z+V2*V5A.K,$
NOM/IJK,<V5A.I,V5A.J,V5A.K>,$
MEAS/IJK,<V5A.I,V5A.J,V5A.K>
PT2 =GENERIC/POINT,DEPENDENT,CARTESIAN,$
NOM/XYZ,<V1.X+V2*V5B.I,V1.Y+V2*V5B.J,V1.Z+V2*V5B.K>,$
MEAS/XYZ,<V1.X+V2*V5B.I,V1.Y+V2*V5B.J,V1.Z+V2*V5B.K,$
NOM/IJK,<V5B.I,V5B.J,V5B.K>,$
MEAS/IJK,<V5B.I,V5B.J,V5B.K>
PT3 =GENERIC/POINT,DEPENDENT,CARTESIAN,$
NOM/XYZ,<V1.X+V2*V5C.I,V1.Y+V2*V5C.J,V1.Z+V2*V5C.K>,$
MEAS/XYZ,<V1.X+V2*V5C.I,V1.Y+V2*V5C.J,V1.Z+V2*V5C.K,$
NOM/IJK,<V5C.I,V5C.J,V5C.K>,$
MEAS/IJK,<V5C.I,V5C.J,V5C.K>

    Do the same with circ2...
  • in reply to JEFMAN
    nice jeffman
    i work in 2020 r1.
    will the fixed rad circle be accurate tho? since if i click out a autocircle on cad (which actually is a cone) it gives me a diameter (not 6.86 as in drawing). so the fixedrad circle will have the diameter from the start at the cone, and if i change the depth to 2mm the nominal diameter will stay the same, (But the acctual diameter will get smaller). so it will have wrong nominals
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  • in reply to JEFMAN
    nice jeffman
    i work in 2020 r1.
    will the fixed rad circle be accurate tho? since if i click out a autocircle on cad (which actually is a cone) it gives me a diameter (not 6.86 as in drawing). so the fixedrad circle will have the diameter from the start at the cone, and if i change the depth to 2mm the nominal diameter will stay the same, (But the acctual diameter will get smaller). so it will have wrong nominals
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