Special Axes; Main Spindle, Master Spindle - Siemens SINUMERIK 840D sl Programming Manual

Other information
15.1 Axes
15.1.2

Special axes

In contrast to the geometry axes, no geometrical relationship is defined between the special
axes.
Typical special axes are:
• Tool revolver axes
• Swivel table axes
• Swivel head axes
• Loader axes
Axis identifier
On a turning machine with circular magazine, for example:
• Revolver position U
• Tailstock V
Programming example
Program code
N10 G1 X100 Y20 Z30 A40 F300
N20 POS[U]=10POS[X]=20 FA[U]=200 FA[X]=350
N30 G1 X500 Y80 POS[U]=150FA[U]=300 F550
N40 G74 X1=0 Z1=0
15.1.3

Main spindle, master spindle

The machine kinematics determine, which spindle is the main spindle. This spindle is usually
declared as the master spindle in the machine data.
This assignment can be changed with the SETMS(<spindle number>) program command.
SETMS can be used without specifying a spindle number to switch back to the master spindle
defined in the machine data.
Special functions such as thread cutting are supported by the master spindle.
Spindle identifier
S or S0
422
Comment
; Path axis movements
; Positioning axis movements
; Path and positioning axis
; Approach home position
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals