ACU-RITE 300S READOUTS - Manual (Page 18)

4 I
I - 1 F
undamentals of P
o
sitioning
Zero Angle Reference Axis
The Zero Angle Reference Axis is the 0.0° position. It is defined as
one of the two axes in the plane of rotation. The following table
defines the Zero Angle where the position of the angle is zero for the
three possible planes of rotation.
For angular positions, the following reference axes are defined:
Positive direction of rotation is counterclockwise if the working plane
is viewed in the negative tool axis direction.
EXAMPLE: Angle in the working plane X / Y
Reading head position
The reading head position provides feed back to the 300S that
converts the movement of the machine axes into electrical signals.
The 300S constantly evaluates these signals, and calculates the actual
positions of the machine axes, which it displays as a numerical value
on the screen.
If there is an interruption in power, the calculated position will no
longer correspond to the actual position. When power is restored, you
can re-establish this relationship by using the reference marks on the
provided on the scale. The 300S provides the Reference Mark
Evaluation feature (REF).
Plane Zero Angle Reference Axis
XY +X
YZ +Y
ZX +Z
Plane Zero Angle Reference Axis
+ 45° ... bisecting line between +X and +Y
+/- 180° ... negative X axis
- 270° ... positive Y axis