Axis Mode - Siemens SINUMERIK 840D sl Commissioning Manual

Fundamentals
15.8 Spindle data
15.8.3

Axis mode

Why axis mode?
For certain machining tasks (e.g. on lathes with end-face machining), the spindle not only
has to be rotated with M3, M4 and M5 and positioned with SPOS, M19 and SPOSA, but also
addressed as an axis with its axis identifier (e.g. "C").
Prerequisites
● The same spindle motor is used for spindle mode and axis mode.
● The same position measurement system or separate position measurement systems can
● A position actual-value encoder is a mandatory requirement for axis mode.
● If the axis is not synchronized, e.g. M70 is programmed after POWER ON, the axis must
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 in the machine
data:
MD20094 $MC_SPIND_RIGID_TAPPING_M_NR
The value on delivery is 70.
Functionality
If the axis mode is active and the rotary axis homed, all axis functions can be used.
References:
/FB2/Function Manual, Extended Functions; Rotary Axes (R2)
The most important functions are:
● Programming with axis name
● Use of zero offsets (G54, G55, TRANS, etc.)
● G90, G91, IC, AC, DC, ACP, ACN
● Use of kinematic transformations (e.g. TRANSMIT)
● Interpolation with other axes (path interpolation)
● Programming as a positioning axis
332
be used for spindle mode and axis mode.
first be referenced with G74. Only then does the mechanical position match the
programmed one.
Example:
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
IBN CNC: NCK, PLC, drive