HEIDENHAIN ND 522 - Manual (Page 74)

74 II Technical Information
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Installation
Set
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Display Configuration
The DISPLAY CONFIGURATION form is where the operator
determines which axes are displayed, and in what order.
 Scroll to the desired display, and press Enter.

Press the ON/OFF soft key to turn the display on, or off. Press the
LEFT, or RIGHT ARROW key to select the axis label.
 Scroll to the INPUT field.
 Press 1, 2, or 3 to select the encoder input number (X1, X2, or X3).
 Scroll to the DISPLAY RESOLUTION field. Press the COARSER, or
FINER soft keys to select the display resolution.
 For rotory encoders, scroll to the angle display field. Press ANGLE
soft key to select the format for the angle display.
Coupling
 Press the numeric keys associated with the encoder input on the
back of the unit. Press the +, or - soft keys to couple a second input
with the first. The input numbers are displayed next to the axis label
indicating that the position is a coupled position.
Error Compensation
The distance a cutting tool travels, measured by an encoder, can in
certain cases, differ from the actual tool travel. This error can occur
due to ball screw pitch error, or deflection, and tilting of axes. This
error can either be linear, or non-linear. These errors can be
determined with a reference measurement system, e.g. the VM 101
from HEIDENHAIN, or with gauge blocks. From an analysis of the error
it can be determined which form of compensation is required, linear,
or non-linear error.
The ND 522/523 provides the opportunity to compensate for these
errors, and each axis can be programmed separately with the
appropriate compensation.
Error compensation is only available when using linear
encoders.