System Coordinates

Understanding system coordinates is important for two reasons. First, they are the direct result of performing the built-in alignment procedure. Second, they change how scan data is represented and how measurement results should be interpreted.

Performing the built-in alignment procedure on sensors adjusts the coordinate system in relation to sensor coordinates, resulting in system coordinates (for more information on sensor coordinates, see Sensor Coordinates). For more information on aligning sensors, see Aligning Sensors.

The adjustments resulting from alignment are called transformations (offsets along the axes and rotations around the axes). Transformations are displayed in the Sensor panel on the Scan page. For more information on transformations in the web interface, see Transformations.

Alignment is used with a single sensor to compensate for mounting misalignment and to set a zero reference, such as a conveyor belt surface.

Y angle is positive when rotating from positive X to positive Z axis.

X angle is positive when rotating from positive Y to positive Z. Z angle is positive when rotating from positive X to positive Y.

Alignment can be used to establish a transformed coordinate system according to the user's needs. Alignment determines the adjustments to X, Y, and Z, as well as rotation angle around each axis. Transformed coordinate systems can be associated with specific sensor jobs. For details, see Aligning Sensors.

When applying the transformations, the data is first rotated around X (clockwise, with the X axis toward the viewer), then Y (counterclockwise), and then Z (clockwise), and then the offsets are applied.