Commissioning: Axis-Specific Machine Data - Siemens SINUMERIK 840D sl Function Manual

K3: Compensations
5.3 Backlash compensation
Activation
The mechanical backlash compensation of a machine axis is active in all operating modes.
Precondition:
● Incremental measuring system: Encoder state == "referenced"
● Absolute encoder: Encoder state == "synchronized"
Displaying the compensation values
The compensation values active at the actual position of the machine axis are displayed on
the user interface for each individual axis.
SINUMERIK Operate: "Diagnostics" operating area > ETC key (">") > "Axis diagnostics" >
"Service axis" >
● "Absolute compensation value measuring system 1"
● "Absolute compensation value measuring system 2"
● "Compensation, sag + temperature"
5.3.1.2

Commissioning: Axis-specific machine data

Compensation value
The compensation value of the mechanical backlash is entered in the machine data.
MD32450 $MA_BACKLASH[ <active measuring system> ] = <compensation value>
Measurement
● Traversing the machine axis and/or the machine part to any measurement position at a
high velocity.
● Measuring the actual position of the machine part
● Calculating the backlash compensation value K
K
machine part"
– K
– K
Checking
To check the effect of the compensation, we recommend that the mechanical backlash is
measured after the machine data has been activated.
Circularity test
The circularity test integrated in the user interface can be used to visualize the mechanical
backlash.
SINUMERIK Operate: "Commissioning" operating area > "Optimization/Test" > "Circularity
test"
260
= "displayed actual position of the machine axis" - "measured actual position of the
L
> 0 (positive backlash ) ⇒ positive compensation value
L
< 0 (negative backlash ) ⇒ negative compensation value
L
L
Function Manual, 10/2015, 6FC5397-1BP40-5BA3
Extended Functions