Heidenhain ND 522 User Manual download pdf (Page 14)

14 I Operating Instructions

I - 1 Fundamentals of Positioning

Zero Angle Reference Axis

The Zero Angle Reference Axis is the 0 degree 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

Position Encoders

The position feedback encoders convert the movement of the

machine axes into electrical signals. The ND 522/523 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,this

relationship can be re-establish with the aid of the reference marks on

the position encoders, and the ND 522/523's reference mark

evaluation feature (REF).

Plane Zero Angle Reference Axis

XY +X

YZ +Y

ZX +Z

Angle Corresponds to the...

+ 45° ... bisecting line between +X, and +Y

+/– 180° ... negative X axis

- 270° ... positive Y axis

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 92 93

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Heidenhain ND 522 User Manual Page 14