Siemens SINUMERIK 840D Function Manual page 252

T1: Indexing axes
8.5 Supplementary conditions
Further information: Function Manual Basic Functions, emergency stop
NOTICE
Approaching the indexing position
After an Emergency Stop, before the interlocking of the Hirth gearing at the machine is
reactivated, either the PLC user program or the operator (manually) must first move the "Hirth
axis" to an indexing position in the JOG mode.
Synchronized actions
● Delete distance to go (DELDTG)
If, for a "Hirth axis", the distance to go is deleted with a synchronized action using DELDTG,
then the axis is stopped at the next possible indexing position in the traversing direction
Further information: Function Manual Synchronized Actions, "Detailed description" >
"Actions in synchronized actions" > "Delete distance to go (DELDTG)"
Various axis-specific functions
"Hirth axes" may not be used in conjunction with the following functions:
● Kinematic transformation
Further information: Function Manual Transformations, kinematic transformation
● Work offset by setting the actual value: PRESETON
Further information: Programming Manual, Job Planning, Section "Coordinate
transformations (frames)"
● Revolutional feedrate (G95, FPRAON)
● Manual traversing using a handwheel as well as distance or velocity overlay using the
handwheel (DFR)
Further information: H1: Manual traversing (Page 633)
● Frames
Further information: Function Manual Basic Functions; Axes, coordinate systems, frames >
Frames
● Interpolatory corrections, for example external work offset, DRF offset
● Couplings
It is not permissible that a "Hirth axis" is a following axis of one of the following couplings:
– following axis with master value coupling
– Coupled motion axis
– gantry following axis
252
Further information: Master value coupling (Page 453)
Further information: Coupled motion (Page 419)
Further information: G1: Gantry axes (Page 259)
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA