brown & sharpe Global 121510, Руководство пользователя

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Introduction to CMM
Global User Manual
10-3
Intro. to CMM
Introduction to CMM
While your site is being prepared for the arrival of your new
CMM why not take a few minutes and review the information
provided below. It is a basic look at Coordinate Metrology. It
will serve as an excellent starting point for people new to CMM
and an informative review of the basics for the experts.
The Coordinate System
We use a coordinate system to describe the movements of a
measuring machine. The coordinate system, invented by the
famous French philosopher and mathematician René Descartes
in the early 1600’s, lets us locate features relative to other
features on workpieces.
A coordinate system is similar to an elevation on map where the
combination of a letter along one edge of the map, a number
along the other, and elevations shown throughout specifically
describe each location on the map. This letter / number / eleva-
tion combination is called a coordinate and represents a specific
place relative to all others.
Another example is a street map with buildings shown. To walk
to your hotel room at the Ritz Hotel from the train station (your
origin), you walk two blocks along Elm Street, four blocks on
Maple and up three floors in the Ritz. This location can also be
described by the coordinates 4-E-3 on the map, corresponding to
the X, Y and Z axes on the machine. These coordinates uniquely
describe your room and no other location on the map.