Other Programming Features Relating To Rotary Axes; Activating Rotary Axes - Siemens SINUMERIK 840D Function Manual

R2: Rotary axes

7.4 Activating rotary axes

Limited traversing range
The traversing range is limited just the same as for linear axes. The range limits are defined by
the "plus" and "minus" software limit switches.
7.3.4

Other programming features relating to rotary axes

Offsets
TRANS (absolute) and ATRANS (additive) can be applied to rotary axes.
Scalings
SCALE or ASCALE are not suitable for rotary axes, since the control always bases its modulo
calculation on a 360º full circle.
Preset actual value memory
PRESETON is possible.
Indexing axes
See Section "T1: Indexing axes (Page 239)".
7.4 Activating rotary axes
Procedure
The procedure for activating rotary axes is the same as that for linear axes with a small number
of exceptions. It should be noted that, as soon as the axis is defined as a rotary axis (MD30300
$MA_IS_ROT_AX = 1), the axis-specific-machine-/setting-data units are interpreted by the
control as follows:
Positions
Velocities
Accelerations
Jerk limitation
234
In "degrees"
In "rev/min"
In "rev/sec "
2
In "rev/sec "
3
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA