|
Sphere Measurement Question | |||
Post Reply | Forum |
Posted by: Hup23Hup ® 04/19/2007, 13:21:06 Author Profile eMail author Edit |
I am checking a sphere on a Mitutoyo CMM using Geopak software. When I check the sphere around a 40 degree arc on four sides I get a Spherical radius diameter slightly below top tolerance and a sphere form out of spec. (Presumably this is because the sphere form tolerance is the difference between a perfect sphere on bottom tolerance (radius) versus a perfect sphere on top tolerance (radius), minus the actual measured diameter. I.E ((MMC-LMC)-Actual Diameter)= Sphere form Tolerance or
However, when I check the part at 45 Degrees around 4 arcs I get a nearly perfect nominal radius sphere and the form of the sphere comes in .( This is because the sphere form tolerance has opened, not because the form value changed). Our thoughts were as the sphere diameter got smaller, due to the fact that the diameter got smaller on average from the 40-45 degrees arc, that the sphere form would have been got worse, as these points must have been the lowest taken? Thanks
|
Post Reply Tell a Friend (must be logged in) Alert Admin About Post |
Powered by Engineers Edge
© Copyright 2000 - 2024, by Engineers Edge, LLC All rights reserved. Disclaimer