G1: Gantry Axes; Brief Description - Siemens SINUMERIK 840D sl Function Manual

G1: Gantry axes

2.1

Brief description

Gantry axes are machine axes that are mechanically and rigidly connected with one another,
e.g. axes to move the gantry of gantry milling machines. Because of this mechanical coupling,
gantry axes must always be traversed together as gantry grouping.
The axis via which this gantry grouping is explicitly traversed or programmed is called the
leading axis. The axes of the gantry grouping, which are automatically and synchronously
traversed from the NC, are called synchronous axes.
Traversing the leading axis and synchronous axes that are not in synchronism with one
another - e.g. if one of the synchronous axes is blocked - can cause damage to the machine.
This is the reason that the synchronism difference between the leading and synchronous
axes is continually monitored by the NC. Alarm and alarm limits can be parameterized for the
synchronism difference. A message is displayed if the alarm limit is exceeded. The complete
gantry grouping is stopped when the alarm limit is exceeded.
Special Functions
Function Manual 09/2011, 6FC5397-2BP40-2BA0
2
145