HEIDENHAIN PT 855 for Milling - Manual (Page 101)

II - 3 Encoders and Measured Value Display
POSITIP 855 Technical Information 99
Non-linear axis error compensation
Working with non-linear axis error compensation
To activate the non-linear axis error compensation you have to:
ä Activate the function using working parameter P40 .
ä Enter the compensation values in the table.
ä Traverse the reference points every time you turn the machine
on .
Selecting the operating mode COMPENSATION VALUE
TABLE
In the COMPENSATION VALUE TABLE operating mode enter the
compensation values for non-linear axis error compensation as fol-
lows:
ä Press the "MOD" key.
ä Select the "Code Number" soft key.
ä Enter code number 105 296 and confirm with ENT.
The POSITIP 855 automatically switches the position display to
REF when the compensation value table is selected (the datum for
the display is the scale reference point).
The functions are in two soft-key rows and can be selected using
the "paging" keys.
Row 1: Enter the compensation value using the keyboard.
Row 2: Read in or output the compensation value table using data
interface.
You can enter compensation values at 64 compensation points for
each axis — as a function of the positions in the axis causing the
error.
Entering data
Select the individual input fields with the arrow keys and enter:
ä The axis which is to be corrected under "faulty axis?".
Press axis soft key.
ä The axis which is causing the error under "axis causing error?"
Press axis soft key.
ä The datum for the axis causing the error under "datum."
ä The distance between the compensation points for the axis
causing the error under "compensation point distance?" as an
exponent to the base 2 :
e.g. 14 = 2 14 = 16 384 µm.
ä Compensation values: compensation point 0 is preassigned the
value 0.000 and cannot be changed.
Deleting the table
You can delete the table values as follows:
ä Select the table to be deleted under "faulty axis?" and press
the axis soft key.
ä Press "delete table."