Siemens SINUMERIK 840D sl Commissioning Manual page 335

Figure 15-8
Master spindle
In order to use diverse spindle functions in one channel, like for instance
● Revolutional feed (G95)
● Tapping with compensation chuck (G63)
● Thread cutting (G33)
● Dwell time in spindle revolutions (G4 S...)
it is necessary to define a master spindle in each channel:
● MD20090: SPIND_DEF_MASTER_SPIND (master spindle initial setting in channel)
The spindle number defined in machine data MD35000: SPIND_ASSIGN_TO_MACHAX
(spindle number) of the channel spindle that ist be used as master spindle is entered in this
machine data.
Spindle reset
The following machine data defines whether the spindle is to remain active after reset (IS:
DB21,... DBX7.7) or end of program (M02/M30).
● MD 35040: SPIND_ACTIVE_AFTER_RESET (spindle active after reset)
To cancel spindle movements, an independent spindle reset is required:
● IS: DB31,... DBX2.2 (spindle reset)
Literature
Function Manual Basic Functions; Spindles
IBN CNC: NCK, PLC, drive
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
Validity of parameter sets for axis and spindle modes
Fundamentals
15.8 Spindle data
335