Turning, Milling, Nibbling
Function Manual, 11/2012, 6FC5397-1CP10-5BA0
85
Gantry axes (G1)
6
6.1 Brief description
Note
This function is under license and is not available with version T/M value.
If the corresponding option is activated without a valid license, alarm 8081 "%1 option(s) that
has (have) not been licensed using a license key was (were) set" is output. It will not be
possible to operate the machine as normal.
For information on operations relating to "Setting (an) option(s)", please refer to the section
titled "Licensing in SINUMERIK 802D sl" in the "Turning, Milling, Grinding, Nibbling"
Operating Instructions.
Gantry axes
Gantry axes are mechanically grouped machine axes. Because of this mechanical coupling,
gantry axes are always traversed in unison. The control occurs through the "gantry axes"
function.
The machine axis that is directly traversed is called the leading axis. The machine axis that
is traversed in synchronism with it is called the synchronized axis. Together, the leading axis
and synchronized axis form a gantry axis grouping.
The difference between the actual positions of the leading axis and synchronized axis is
monitored continuously. When the actual position value of the synchronized axis deviates
too much from that of the leading axis, the control automatically brings all axes in the gantry
grouping to a standstill in order to prevent any damage to the machines.
Application
Two feed drives are required to traverse the gantry on large gantry-type milling machines,
i.e. one drive with its own position measuring system on each side. Owing to the mechanical
forced coupling, both drives must be operated in absolute synchronism to prevent canting of
mechanical components.
Configuration
A gantry axis grouping consisting of a leading axis and synchronized axis can be defined.
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