Example; Commissioning The Temperature Compensation For The Z Axis Of A Lathe - Siemens SINUMERIK 840D sl Function Manual

K3: Compensations
5.2 Temperature compensation
MD32760 $MA_COMP_ADD_VELO_FACTOR (velocity increase as a result of
compensation)
The specified value acts as a factor and is referred to the maximum axis velocity (MD32000
$MA_MAX_AX_VELO).
MD32760 also limits the maximum gradient of the error line (tan ß) of the temperature
compensation.
5.2.3

Example

5.2.3.1

Commissioning the temperature compensation for the Z axis of a lathe

Commissioning of temperature compensation is described below using the example of a Z
axis on a lathe.
Determining the error characteristic of the Z axis
In order to determine the temperature-dependent error characteristic of the Z axis, proceed as
follows:
● Uniform temperature increase by traversing the axis across the whole Z axis traversing
range (in the example: from 500 mm to 1500 mm)
● Measuring the axis position in increments of 100 mm
● Measuring the actual temperature at the leadscrew
● Executing a traversing measuring cycle every 20 minutes
The mathematical and technological relationships and the resulting parameters for
temperature compensation are derived from the recorded data. The calculated deviation errors
for a specific temperature, which refer to the actual position of the Z axis displayed by the NC,
are represented in graphic form in the diagram below.
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Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions