Axis Mode; General Functionality - Siemens SINUMERIK 840D Function Manual

S1: Spindles
18.2 Operating modes
Setting the signal
Requirements for output of signal DB31, ... DBX85.5 (spindle in position) are as follows:
● The referenced state of the spindle:
DB31, ... DBX60.4/5 (referenced/synchronized 1/2) = 1
Note
When positioning the spindle, the zero mark is automatically searched for. This is the reason
that for an error-free sequence, the referenced signal is always available at the end of
positioning movement.
● "Exact stop fine" must have been reached:
DB31, ... DBX60.7 (exact stop fine) = 1
Additionally, the last programmed spindle position must have been reached on the setpoint
side.
Deleting the signal
When signal DB31, ... DBX60.7 is withdrawn (exact stop fine), then signal DB31, ... DBX85.5
(spindle in position) is also always reset.
Additional properties
● If the spindle is already at the programmed position after a positioning, then the NC/PLC
interface signal DB31, ... DBX85.5 (spindle in position) remains set.
● If, after a positioning ("Spindle in position" signal was output) the spindle is traversed, e.g.
in the JOG mode, then the NC/PLC interface signal DB31, ... DBX85.5 (spindle in position)
is deleted.
If the spindle is returned to its original position in this mode, then the NC/PLC interface signal
DB31, ... DBX85.5 (spindle in position) is set again. The last position selection is kept.
18.2.6

Axis mode

18.2.6.1

General functionality

Functionality
If for certain machining tasks, e.g. on lathes with end-face machining, it is not sufficient to
traverse the spindle exclusively under speed control via M3, M4, M5 or to position with SPOS,
M19 or SPOSA, the spindle can be switched to position-controlled axis mode and traversed as
a rotary axis.
Examples of rotary axis functions:
● Programming with axis name
● Zero offsets (G54, G55, TRANS, etc.)
● G90, G91, IC, AC, DC, ACP, ACN
756
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA