Maximum Compensation Value Per Ipo Clock Cycle; Example; Commissioning The Temperature Compensation For The Z Axis Of A Lathe - Siemens SINUMERIK 840D sl Function Manual

5.2.2.3

Maximum compensation value per IPO clock cycle

MD32760
The maximum possible compensation value per IPO cycle, i.e. the maximum distance that
can be traversed in an IPO cycle as a result of the temperature compensation, is limited
using machine data:
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 (tanß) 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
● 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.
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
range (in the example: from 500 mm to 1500 mm)
K3: Compensation
5.2 Temperature compensation
349