Channel Axes; Path Axes; Positioning Axes - Siemens Sinumerik 840D sl Programming Manual

Other information
16.1 Axes
Axis identifier
The name/identifier of a machine axis can be defined using the following NC-specific machine
data:
MD10000 $MN_AXCONF_MACHAX_NAME_TAB (machine axis name)
Default setting: X1, Y1, Z1, A1, B1, C1, U1, V1
Further, machine axes have fixed axis identifiers, which can always be used, independent of
the names set in the machine data:
AX1, AX2, ..., AX<n>
16.1.5

Channel axes

All geometry, special and machine axes, which are assigned to a channel, are called channel
axes.
Axis identifier
The channel-specific name/identifier of a geometry and special axis can be defined using the
following machine data:
MD20080 $MC_AXCONF_CHANAX_NAME_TAB (channel axis name)
Default setting: X, Y, Z, A, B, C, U, V
The assignment regarding on which machine axis a geometry or special axis is emulated in
the channel, is defined in the following machine data:
MD20070 $MC_AXCONF_MACHAX_USED (machine axes used)
16.1.6

Path axes

Path axes define the path and therefore the movement of the tool in space.
The programmed feed is active for this path. The axes involved in this path reach their position
at the same time. As a rule, these are the geometry axes.
However, default settings define, which axes are the path axes, and therefore determine the
velocity.
Path axes can be specified in the NC program with FGROUP.
For more information about FGROUP, see "Feedrate (G93, G94, G95, F, FGROUP, FL,
FGREF) (Page 97)".
16.1.7

Positioning axes

Positioning axes are interpolated separately; in other words, each positioning axis has its own
axis interpolator and its own feedrate. Positioning axes do not interpolate with the path axes.
Positioning axes are traversed by the NC program or the PLC. If an axis is to be traversed
simultaneously by the NC program and the PLC, an error message appears.
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Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals