Feedrate For G331/G332, Rigid Tapping - Siemens SINUMERIK 828D Function Manual

17.2.5

Feedrate for G331/G332, rigid tapping

G331 (tapping) and G332 (tapping retraction) can be used to tap a thread without a compensating chuck (rigid
tapping) if the spindle is technically capable of operating in position control mode.
Speed S, feedrate F, thread lead
A revolutional feedrate [mm/rev.] is used for G331 and G332. The revolutional feedrate is defined by
programming the thread lead increase [mm/rev.].
The speed of the axes for the thread length is calculated from the programmed spindle speed S and the thread
lead.
Feedrate F [mm/min] = speed S [rev/min] * thread lead [mm/rev]
Note
For further information about programming G63/G331/G332, please see:
References:
Programming Guide, Fundamentals
Programming Guide, Cycles
Override
The revolutional feedrate in G331 and G332 can be influenced by an override.
Depending on the configuration, the override affects either the spindle speed or the path feedrate:
MD12090 $MN_OVR_FUNCTION_MASK
Bit Value Significance
0 0 The override influences the spindle speed (initial setting).
Depending on the setting in the machine data:
MD12080 $MN_OVR_REFERENCE_IS_PROG_FEED
the override is related either to the programmed spindle speed or to the configured
spindle speed limitation.
1 The override influences the path feedrate
Depending on the setting in machine data:
MD12082 $MN_OVR_REFERENCE_IS_MIN_FEED
the override is related either to the programmed path feedrate or to the configured
path feedrate limitation.
Note
The following overrides are not effective in G331 and G332:
• Programmable path feedrate override OVR
• Rapid traverse override
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
V1: Feedrates
17.2 Path feedrate F
1385