Percentage Feedrate Override (Ovr, Ovra) - Siemens SINUMERIK 840Di sl Programming Manual

7.6

Percentage feedrate override (OVR, OVRA)

Function
You can use the programmable feedrate override to change the velocity of path axes,
positioning axes, and spindles via a command in the NC program.
Programming
OVR=...
or
OVRA[axis]=...
or
OVRA[SPI(spindle)]=... or OVRA[S...]=...
Parameter
OVR
OVRA
SPI
Axis
Range of values
Example of programmed feed rate change
The programmed feedrate change refers to or is combined with the feedrate override set on
the machine control panel.
Example:
Set feedrate override 80%
Programmed feedrate override OVR=50
The programmed path feedrate F1000 is changed to F400 (1000 * 0.8 * 0.5).
N10 OVR=25 OVRA[A1]=70
N20 OVRA[SPI(1)]=35
or
N20 OVRA[S1]=35
Fundamentals
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
7.6 Percentage feedrate override (OVR, OVRA)
Feedrate change in percent for path feedrate F
Feedrate change in percent for positioning feedrate FA or for spindle
speed S
Converts the spindle number into an axis identifier; the transfer
parameter must contain a valid spindle number. The spindle
identifiers SPI(...) and S... are identical in terms of function.
Positioning axes or geometry axes
...200%, integers; with path and rapid traverse override, the
maximum velocities set in the machine data are not overshot.
;Path feedrate 25%, Positioning feedrate for A1 70%.
;Speed for spindle 1 35%.
Feedrate Control and Spindle Motion
293