Gantry Axes" Function - Siemens SINUMERIK 840D sl Function Manual

G1: Gantry axes

2.2 "Gantry axes" function

2.2 "Gantry axes" function
Application
For gantry milling machines, often various elements - e.g. the gantry or the transverse beams
- are moved by several axes operating in parallel that are independent of one another. Each
axis comprises a machine axis parameterized in the NC, drive, motor and measuring system.
When the gantry traverses, the axes that are mechanically and rigidly coupled with one
another must be controlled in absolute synchronism in order to avoid any tension occurring in
the mechanical system of the machine.
Figure 2-1
Terms
The following terms are used in this functional description:
Gantry grouping
The axes operating in parallel, which together move a mechanical element – and therefore
must always traverse in synchronism – together form a gantry grouping. The axes in a gantry
grouping must either all be linear axes or all be rotary axes.
Leading axis
The axis of the gantry grouping that is programmed and/or addressed to traverse the
mechanical element is known as the leading axis.
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Gantry milling machine with 2 parallel axes for gantry and transverse beams
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions