Siemens SINUMERIK 840D sl Function Manual page 398

Compensations (K3)
Interpolatory compensation
5.4.5 Special features of interpolatory compensation
Measurement
The "Measurement" function supplies the compensated actual positions (ideal machine)
required by the machine operator or programmer.
TEACH IN
The "TEACH IN" function also uses compensated position values to determine the actual
positions to be stored.
Software limit switch
The ideal position values (i.e. the position actual values corrected by the MSEC and
backlash compensation functions) are also monitored by the software limit switches.
Position display
The position actual-value display in the machine coordinate system shows the ideal
(programmed) actual position value of the axis (ideal machine).
In the axis/spindle service display (operating area Diagnosis) the positional value determined
by the measuring system plus the sum of the backlash compensation and leadscrew error
compensation is displayed (= actual position value measuring system 1/2).
Compensation value display
The following compensation values are also output in the "Axes" service display (Diagnosis
operating area):
Axes service display
Absolute compensation value measuring system
1 or 2
Compensation value
Sag/temperature
References:
/FB1/ Function Manual, Basic Functions, Diagnostics Tools (D1)
Reference point loss
If the reference point of the base axis is lost (DB31, ... DBX60.4 or 60.5 = '0' or
"Referenced/synchronized 1 or 2"), the MSEC and sag compensation functions are
deactivated in the affected axes. When the reference point is reached these compensations
are automatically switched on again.
398
Meaning
Display value corresponds to the total
compensation value calculated from "MSEC" and
"Backlash compensation" for the current actual
position of the axis (measuring system 1 or 2).
Display value is the sum of the compensation
values from "beam sag compensation" and
"temperature compensation" for the current actual
position of the axis.
Function Manual, 03/2009, 6FC5397-1BP10-4BA0
Extended Functions