CMM Mcosmos GEOPACK Data

[_Kami_]

Dear members,

I'm new to this forum and I love every bit of info in it and I thank you for sharing it.
For my master's I am developing a tubular space frame chassi for a race team. My university let me use a Mitutoyo CMM to achieve more accurate measurements. To reduce cost and time the techician responsible for the machine extracted geometric shapes calculated by the machine's software insted of the usuals point clouds. I gathered mesurement data from the control A arms, uprights and ball joints from their first prototype. For example, for a cylinder shape, the software provides a center point and angles that determine the orientation of the cylinder axis. Someone knows how this orientation works? Euler Angles maybe? I can't figure it out and the thecnician didn't helped me. I can't find any info about this online.

[RicerDude]

Dear members,

I'm new to this forum and I love every bit of info in it and I thank you for sharing it.
For my master's I am developing a tubular space frame chassi for a race team. My university let me use a Mitutoyo CMM to achieve more accurate measurements. To reduce cost and time the techician responsible for the machine extracted geometric shapes calculated by the machine's software insted of the usuals point clouds. I gathered mesurement data from the control A arms, uprights and ball joints from their first prototype. For example, for a cylinder shape, the software provides a center point and angles that determine the orientation of the cylinder axis. Someone knows how this orientation works? Euler Angles maybe? I can't figure it out and the thecnician didn't helped me. I can't find any info about this online.

AFAIK in CNC the probe measures circles on different planes then draws an axis through their centre points to determine the alignment and runout.

[_Kami_]

The method is the same. I don't know how to interpret the angular data which inform me about axis and planes orientations in a overall coordinate system.
Output:
x: ...[mm] alpha: ...[º]
y: ...[mm] beta: ...[º]
z: ...[mm] gamma: ...[º]
I'm not familiar with this data. I just need some guidance to discover a manual or understand this data.
Thank you.

[_Kami_]

I think I dindn't express myself well enough. Any shape (Cylindrical, plane, conic) or line has the same kind of output. A middle point and angular data for orientation. The cylinder shape only has an extra data (the diameter) and the conic shape has two extra ones (base diameter and conic angle). Anyone with expertise on this subject? I cannot find anything on the web relevant to my case (the orientation method or the actual orientation math).

[_Kami_]

After some painfull hours of trial and error I figured out that the Geopack software angle orientations are simple and almost intuitives. Always check the simplest solutions before assuming some elaborated solution

[Richard]

I'm glad you sorted it out.