Basic Training Workbook
Version 1.5 - August 2007
42
Chapter 4: Basic Part Measurements (Metrology Mode)
In metrology, the traditional way to establish a coordinate system or alignment requires a
plane (or face), a line (or edge) and an origin (point). This is also known as 3-2-1 (3 points
define a plane, 2 points for a line or axis and 1 point is the origin).
FARO Gage software has a
smart alignment
feature that recognizes when you have met the
minimum requirements to create a coordinate system and also tries to determine whether they
should be used based on the available features.
Typical 3-2-1 Coordinate Systems:
•
Face/Edge/Hole - If you have measured a face, an edge, and a hole, the alignment
command will pre-define the face as the XY plane, the edge as the X axis, and the
center of the hole as the origin (or 0,0,0 point of the coordinate system).
•
Face/Edge/Edge - If you have measured a face and two edges, the alignment command
will pre-define the face as the XY plane, the first EDGE as the X axis, and the origin
(or 0,0,0 point of the coordinate system) will be at the intersection of the two edges.
•
Face/Face/Face - If you have measured 3 faces, the alignment command will pre-
define the first face as the XY plane, the edge (or line) formed by the intersection of
the first and second faces as the X axis, and the origin (or 0,0,0 point of the coordinate
system) will be at the point formed at the intersection of all three faces.
N
OTE
:
The face or XY plane also defines the Z axis, which is perpendicular to the XY plane.
X,Y,Z location results do not display for features and dimensions until you build an alignment.
