Special Axes - Siemens SINUMERIK 828D Function Manual

K2: Axis Types, Coordinate Systems, Frames
10.2 Axes
GEOAX()
GEOAX (1, U, 2, V, 3, W)
G1 X10 Y10 Z10 XX=25
GEOAX(0,V)
GEOAX (1, U, 2, V, 3, W)
GEOAX(3,V)
10.2.6

Special axes

Significance
In contrast to geometry axes, no geometrical relationship is defined between the special axes.
Note
Geometry axes have an exactly defined relationship in the form of a right­angled coordinate
system.
Special axes are part of the basic coordinate system (BCS). With FRAMES (translation, scaling, mirroring),
special axes of the workpiece coordinate system can be mapped on the basic coordinate system.
Application
Typical special axes are:
• Rotary axes
• Machine tool axes
• Tool revolver axes
• Loader axes
698
; The geometry axis assignment defined via the machine
data
MD AXCONF_GEOAX_ASSIGN_TAB
is effective,
i.e., XX, YY and ZZ become geometry axes.
; U, V and W become the first, second and third
geometry axes.
; Channel axes U, V, W each traverse to position 10, XX
traverses to position 25.
; V is again removed from the geometry axis grouping. U
and W remain geometry axes. The second geometry axis
is no longer assigned.
; U, V and W become the first, second and third
geometry axes, i.e., U and W remain unchanged.
; V becomes the third geometry axis. This means that W,
which was previously the third geometry axis, is
removed from the geometry axis grouping. The second
geometry axis is no longer assigned.
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions