Siemens SINUMERIK 840D Function Manual page 483

● The radial axis (X) for infeeding the cutter to depth of tooth.
● The cutter swivel axis (A) for setting the hobbing cutter in relation to the workpiece as a
function of cutter lead angle and angle of inclination of tooth.
Figure 14-10
The functional interrelationships on the gear hobbing machine are as follows:
In this case, the workpiece table axis (C) is the following axis which is influenced by three
master drives.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Definition of axes on a gear hobbing machine (example)
M3: Coupled axes
14.4 Electronic gear (EG)
483