HEIDENHAIN TNC 335 Technical Manual - Manual (Page 123)

4-26
TNC 360 1 Machine Axes 8/95
The orange axis keys can be used to select a different fault-related axis for the X axis. After pressing
the GOTO key, the axis keys can be used to select a correction table for one of the other axes. The
correction value which is entered must not exceed the maximum correction-value difference. The
correction-value difference is calculated as follows:
Max. correction-value difference =
distance between correction points [mm]
64
In our example, the result is
16.384 mm
64
= 0.256 mm
Only the compensation points of the error curve should be entered. The control will automatically
make a linear interpolation between the compensation points. In the example above the correction
table is thus:
Y = F(Z)
DATUM POINT
–990
SETUP 14
0 Z–990 Y+0
1 Z–973.616 Y–0.06
2 Z–957.232 Y–0.09
3 Z–940.848
4 Z–924.464
5 Z–908.08
Y–0.12
6 Z–891.696 Y–0.12
7 Z–875.312 Y–0.1
8 Z–858.928 Y–0.09
.
.
.
No entry is necessary in lines 3 and 4 (press the NO ENT key), because there is no visible kink. The
individual lines of the correction table are selected either by the arrow keys or with the GOTO key.
Press the END
key to leave the correction table.
Special case: Axis of rotation
In a correction table for a rotary axis, the entered distance between correction points must be large
enough that the 64 correction points will cover a complete revolution of 360°. An angular separation
of at least 5.625° (2
16 ) is therefore necessary. For an axis of rotation, correction values will only be
recognized for entries from 0 to 360°.
Input and output of the correction table via the data interface
After entering the code number 105296 the correction table can be entered or read out via the data
interface.
As usual, the data transfer is initiated with the EXT key. The correction table receives the file name
extension ".S".