Siemens SINUMERIK 840D Function Manual page 757

● Kinematic transformations (e.g. TRANSMIT)
● Path interpolation
● Traversing as positioning axis
Further information
R2: Rotary axes (Page 221)
Requirements
● The same spindle motor is used for spindle mode and axis mode.
● The same position measurement system or separate position measurement systems can
be used for spindle mode and axis mode.
● An actual position value encoder is a mandatory requirement for axis mode.
● The spindle must be referenced for use of the axis mode, e.g. referenced with G74.
Example:
Program code
M70
G74 C1=0 Z100
G0 C180 X50
Configurable M function
The M function used to switch the spindle to axis mode can be configured channel-specifically
via the following machine data:
MD20094 $MC_SPIND_RIGID_TAPPING_M_NR
Note
The control detects the transition to axis mode automatically from the program sequence (see
"Implicit transition to axis mode (Page 759)"). The explicit programming of the configured M
function for switching the spindle to axis mode in the part program is therefore not necessary.
However, the M function can continue to be programmed, e.g. to increase the readability of the
part program.
Special features
● The feedrate override switch is valid.
● The NC/PLC interface signal does not terminate the axis mode per default:
DB21, ... DBX7.7 (reset).
● The NC/PLC interface signals:
DB31, ... DBB16 to DBB19 and DBB82 to DBB91
are not important if:
DB31, ... DBX60.0 == 0 (spindle / rotary axis)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Comment
; Switch spindle over to axis mode
; Reference axis
; Traverse axis position-controlled
S1: Spindles
18.2 Operating modes
757