HEIDENHAIN TNC 430 PA - Inputting the Error Trace

6 – 40 HEIDENHAIN Technical Manual TNC 426, TNC 430
The following graphic shows the trace of an axis sag error as a function of Y
(Z = f(Y)):
Inputting the error
trace
To enter the error trace in the TNC:
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7 Ascertain the error trace with a comparator measuring system.
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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.
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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.
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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).
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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
16
= 65536 = 6.5536 mm
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7 Exit the header by pressing END.
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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
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7 To enter compensation values: Enter only the break points of the error trace.
The TNC interprets linearly between the break points.