Siemens SINUMERIK 840D sl Function Manual page 160

G1: Gantry axes
2.3 Referencing and synchronization of gantry axes
Activation of axis compensations
Compensation functions can be activated for both the leading axis and the synchronized
axes. Compensation values are applied separately for each individual gantry axis. These
values must therefore be defined and entered for the leading axis and the synchronized axes
during start-up.
The compensations do not become operative internally in the control until the axis is
referenced or the gantry grouping synchronized. The following applies:
Compensation type
Backlash compensation
LEC
Sag compensation
Temperature compensation
If a movement by the synchronized axis (axes) is caused by an active compensation, a travel
command is displayed for the synchronized axis (axes) independently of the leading axis.
Monitoring functions effective
Analogous to normal NC axes, the following monitoring functions do not take effect for gantry
axes until the reference point is reached (IS "Referenced/Synchronized"):
• Working area limits
• Software limit switch
• Protection zones
The axial machine data values are used as monitoring limit values for the synchronized axes
as well.
Multi-channel block search
The cross-channel block search in Program Test mode (SERUPRO "Search Run by Program
test") can be used to simulate the traversal of gantry axis groupings.
Note
Further information regarding multi-channel block search SERUPRO can be found under:
References:
/FB1/ Function Manual, Basic Functions; Mode group, Channel, Program Mode (K1),
Chapter "Program Test"
160
Takes effect when
Axis is referenced
Axis is referenced
Gantry grouping is
synchronized
Gantry grouping is
synchronized
PLC interface signal
"Referenced/Synchronized"
"Referenced/synchronized"
"Gantry grouping is synchronized"
"Gantry grouping is synchronized"
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions