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how to measure depth accurately

Donald M
Good Morning Guys,

I got this part coming my way soon and am thinking of the best way to measure the depth on the CMM.

its a cylindrical part with the pockets drilled at 45 degrees and split into segments.

I will be receiving these parts split into segments.
I got good results using the comparator since it was able to project the apex, but that isn't going to be efficient for the number of parts i will be receiving.

I can create 2d lines and create the intersection points and measure the depth from that point to the outside diameter.

But i was wondering if there is any way to measure these pockets as a cylinder, and then measure the bottom of the pocket as a plane and find the lowest point which the cylinder and plane intersect?
not sure if that makes sense?

looking for some ideas?

what do you think the best way to measure the depth on these parts is?

Thanks in advance you guys have always been a great help!
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  • Lets take the middle cylinder out of the three as example. Flat on the table, cylinder pointing in machines Y-axis.

    Measure the cylinder.
    Align to it (primary).
    Measure the bottom plane for the cylinder.
    Set X and Z origin in cylinder.
    Set Y origin in plane.
    Measure a line going in Z on the plane, X=0, Y=0 adjust Z as necessary for the two points.
    Measure a line going in Y on the cylinder surface. X=0, adjust Y as necessary, Z=negative cylinder radii (actuals if possible)
    Intersect the two lines.
    Evaluate the distance between the top plane and the intersection point, perpendicular to the top plane.
Reply
  • Lets take the middle cylinder out of the three as example. Flat on the table, cylinder pointing in machines Y-axis.

    Measure the cylinder.
    Align to it (primary).
    Measure the bottom plane for the cylinder.
    Set X and Z origin in cylinder.
    Set Y origin in plane.
    Measure a line going in Z on the plane, X=0, Y=0 adjust Z as necessary for the two points.
    Measure a line going in Y on the cylinder surface. X=0, adjust Y as necessary, Z=negative cylinder radii (actuals if possible)
    Intersect the two lines.
    Evaluate the distance between the top plane and the intersection point, perpendicular to the top plane.
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