Inputting The Error Trace - HEIDENHAIN TNC 426 PB/M Technical Manual

Table of Contents

Inputting the error

The following graphic shows the trace of an axis sag error as a function of Y

To enter the error trace in the TNC:

Ascertain the error trace with a comparator measuring system.

To create a compensation-value table: Press the MOD key and enter the

code number 807667; for each axis that is to be compensated for, use the

program manager to create a compensation-value table with the name

Using soft keys (e.g. 1 OFF/ON), activate columns in the compensation

value table only for the axes whose positions affect the error of the

compensated axis.

Begin your entry with the soft key HEAD LINE: Enter the datum for the

compensation values as a distance from the machine datum (MP960.x).

Enter a value for the spacing of the compensation points as a power to the

base of 2. The maximum input value is 23.

Example: The input value 16 represents 2

Exit the header by pressing END.

With the soft key APPEND N LINES, enter the number of compensation

• Maximum of 256 compensation points per column

• Maximum of 10 columns in all active compensation value tables

• Total maximum of 1280 compensation points

To enter compensation values: Enter only the break points of the error trace.

The TNC interprets linearly between the break points.

= 65536 = 6.5536 mm

HEIDENHAIN Technical Manual TNC 426, TNC 430