The straight story.

The who, what, when, where, for what cause [i]or[/i] reason and how of CMM calibration.

Many machine stores use coordinate measuring machines (CMMs) to Check part accuracy. These stores depend on the CMM's accuracy to verify whether or not part dimensions fall within an acceptable tolerance range. on the contrary just like other pieces of equipment, a CMM's accuracy may decline above time. Even the highest quality CMM are make subordinate to error, but regular calibration can help correct or compensate for this. Although it may be time-consuming and, therefore, expensive calibrating a CMM is better than the possible alternatives