Measuring a distance sphere

[[Gr...]]

Hi evybody, I´m not an expert in calypso but I´m trying to figure out how can I measure a distace (6.25) as shown in the image below, (the distance goes from a plane to the tip of the 22 mm sphere located in a conical bore with an angle of 12.5 degrees) do I need some extra data to calculate it? Many thanks

Distance Sphere.jpg

[[Ma...]]

One way would be creating theoretical cylinder with diameter of TED sphere and position from measured cone.
Then cut cone with cylinder and you will get aproximate center of TED sphere. Then just create theoretical sphere and use caliper distance to get your needed value.

[[Ma...]]

Hi,
the drawing suggests a production orientated control of the cone with a sphere and a flat headed depth gauge, and I think it should be measured that way.

If you want to use the CMM then you need to align the TED cylinder with your measured cone (axis and position = colinear).
But be aware that the contacting diameter is below the equator of the sphere and needs to be calculated.

Cone.JPG

[[Ma...]]

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Thanks Markus - I totally forgot that angle.
So if you use formula to calculate diameter of cylinder to be touch diameter, then you can use that cut with cone and cylinder.

[[Da...]]

the only thing that is constant about this problem is the diameter of the sphere.

The contact point of the ball and the cone will be below CL.

with a 12.5-degree cone , that would be approx 1.1975 below CL. This number added to 1/2 the ball diameter is the distance from contact to the top of the ball.

Cone calculation can get your height without creating cylinders , that's what it was made to do.

So here is the issue, let's say the cone is at 12.0 degrees . That will change the contact point from 1.1975 to 1.1498 below centerline, a.0477 difference. If all your suggestions don't account for the actual angle then it won't be too accurate.

Zeiss should have made a function for this a long time ago! For now, if its close tolerance, I would use the ball and a drop indicator.