Inputting The Error Trace - HEIDENHAIN iTNC 530 Technical Manual

Error in Z
[mm]
0.05
0.04
0.03
0.02
Datum
0.01
–90 –76.8928
–0.01
–0.02
–0.03
–0.04
–0.05
Inputting the error
trace
6 – 38
The following graphic shows the trace of an axis sag error as a function of Y
(Z = f(Y)):
–63.7856 –50.6784
To enter the error trace in the iTNC:
7
Ascertain the error trace with a comparator measuring system.
7 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
*.COM.
7 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.
7 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).
7 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
7 Exit the header by pressing END.
7
With the soft key APPEND N LINES, enter the number of compensation
points:
• Maximum of 256 compensation points per column
• Maximum of 10 columns in all active compensation value tables
• Total maximum of 1280 compensation points
7 To enter compensation values: Enter only the break points of the error trace.
The iTNC interpolates linearly between the kink points.
–37.5712 –24.464 –11.3568
16
= 65536 = 6.5536 mm
HEIDENHAIN Technical Manual iTNC 530
Machine
datum
0
Y
[mm]
1.7504