Commissioning - Siemens SINUMERIK 840D sl Function Manual

Smooth the compensation value
To prevent overloading of the machine or tripping of monitoring functions in response to step
changes in the temperature compensation parameters, the compensation values are
distributed over several IPO cycles by an internal control function as soon as they exceed the
maximum compensation value specified for each IPO cycle (MD32760, see "Commissioning
(Page 255)").
5.2.2

Commissioning

Temperature-dependent parameters
Error curves for different temperatures can be defined for each axis. For each error curve the
following parameters must be determined and then entered in the setting data:
● Position-independent temperature compensation value K
SD43900 $SA_TEMP_COMP_ABS_VALUE
● Reference position P
SD43920 $SA_TEMP_COMP_REF_POSITION
● Gradient tanβ for position-dependent temperature compensation:
SD43910 $SA_TEMP_COMP_SLOPE
Temperature compensation type and activation
The temperature compensation type is selected and the temperature compensation activated
using the axis-specific machine data:
MD32750 $MA_TEMP_COMP_TYPE (temperature compensation type)
Bit
0
1
2
Maximum compensation value per IPO clock cycle
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:
Extended Functions
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
for position-dependent temperature compensation:
0
Value Meaning
Position independent temperature compensation
0 Not active
1 Active
Position-dependent temperature compensation
0 Not active
1 Active
Temperature compensation in tool direction
0 Not active
1 Active
K3: Compensations
5.2 Temperature compensation
:
0
Associated parameters
SD43900
SD43920, SD43910
MD20390
$MC_TOOL_TEMP_COMP_ON
(Activate temperature compensa‐
tion tool length)
255