Programmable Feedrate Override (Ovr, Ovrrap, Ovra) - Siemens Sinumerik 840D sl Programming Manual

Program code
N40 SPOS=150
N50 FPRAOF(S1)
Example 4: Derive revolutional feedrate for positioning axis
Program code
N30 FPRAON(X)
N40 POS[X]=50 FA[X]=500
N50 FPRAOF(X)
Further information
FA[...]
The feedrate type is always G94. When G70/G71 is active, the unit is metric/inches according
to the default setting in the machine data. G700/G710 can be used to modify the unit in the
program.
Note
If no FA is programmed, the value defined in the machine data applies.
FPR(...)
As an extension of the G95command (revolutional feedrate referring to the master spindle),
FPR allows the revolutional feedrate to be derived from any chosen spindle or rotary axis. G95
FPR(...) is valid for path and synchronized axes.
If the rotary axis/spindle specified in the FPR command is operating on position control, then
the setpoint linkage is active. Otherwise the actual-value linkage is effective.
FPRAON(...)
FPRAON is used to derive the revolutional feedrate for positioning axes and spindles from the
current feedrate of another rotary axis or spindle.
FPRAOF(...)
The revolutional feedrate can be deactivated for one or a number of axes/spindles
simultaneously with the FPRAOF command.
8.6

Programmable feedrate override (OVR, OVRRAP, OVRA)

The velocity of path/positioning axes and spindles can be modified in the NC program.
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
8.6 Programmable feedrate override (OVR, OVRRAP, OVRA)
Comment
; Position master spindle.
; Deselect derived revolutional feedrate for the master
spindle.
Comment
; The revolutional feedrate for positioning axis X
must be derived from the master spindle.
; The positioning axis is traversing at 500 mm/rev-
olution of the master spindle.
Feed control
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