HEIDENHAIN MANUALplus 620 Technical Manual page 715

Compensation
value tables
January 2012
The compensation values for nonlinear axis error compensation are stored in
the following tables:
The *.COM tables contain the compensation values for max. 256
compensation points. A *.COM table is required for each axis and spindle.
It consists of the following columns:
• AXISPOS: Compensation points that are assigned compensation
values. The compensation points are given with respect to the machine
datum.
Equidistant spacing between the measuring points is necessary.
• BACKLASH: Compensation values for screw pitch errors in negative
direction of traverse. The BACKLASH column is defined for the axis for
which this compensation-value table is created. This way the backlash
can be compensated directly via the compensation-value table.
• Axis * – axis to which the table refers: Compensation values for
screw pitch errors in positive direction of traverse
• Axis * – adjoining axis: Compensation values for sag errors with
respect to the adjoining axis
• Spindle: The compensation values for a spindle are entered in this
column
In the *.CMA table, the *.COM tables are assigned to the error-causing axis.
• ACTIVE: The character * activates the compensation value tables.
• * axis: File name of the *.COM file with the compensation values of
this axis.
• Spindle: File name of the *.COM file with the compensation values of
this spindle.
You will find the path of the *.CMA tables in the parameter object System/
Paths/CfgTablePath/TABCMA (standard name of the file: config.cma). The
*.CMA file contains the file names of the *.COM files. The directory path of
the *.COM tables is entered in the parameter object System/Paths/
CfgOemPath/oemTable.
6.10 Axis Error Compensation 715