Siemens SINUMERIK 802D sl Function Manual page 87

Leading axis
The leading axis is the gantry axis that exists from the point of view of the operator and
programmer and, thus, can be influenced like a standard NC axis. The axis name of the
leading axis identifies all axes in the gantry axis grouping.
Synchronized axis
A synchronized axis is the gantry axis whose set position is continuously derived from the
motion of the leading axis and is, thus, moved synchronously with the leading axis. From the
point of view of the programmer and operator, the synchronized axis "does not exist".
Conditions for a gantry grouping
● A gantry grouping must not contain a spindle.
● A synchronized axis must not be a PLC axis.
● A synchronized axis must not be addressed by a transformation.
● A synchronized axis must not be the slave axis in another type of axis coupling.
● A synchronized axis must not be defined as the leading axis in another axis grouping.
The control performs a plausibility check on the axis definition.
Components
The "gantry axes" function can be subdivided into the following functional units:
1. Setpoint generation of synchronized axis
2. Monitoring of actual value difference
3. Referencing and synchronizing the leading axis and synchronized axis
Setpoint generation of synchronized axis
From the point of view of the operator, all coupled gantry axes are traversed as if only one
axis, i.e. the leading axis, were programmed in the NC. Analogously, only the leading axis is
programmed in the part program. The commands and traverse requests from the operator,
the PLC interface or via the part program therefore apply in equal measure to all axes in the
gantry grouping.
Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
Note
Each axis in the gantry grouping must be set so that it can take over the function of the
leading axis at any time, i.e. matching velocity, acceleration and dynamic response
settings.
Gantry axes (G1)
6.2 "Gantry axes" function
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