Programmable Acceleration Override (Acc) (Option) - Siemens Sinumerik 840D sl Programming Manual

Feed control

8.7 Programmable acceleration override (ACC) (option)

Syntax
OVR=<value>
OVRRAP=<value>
OVRA[<axis>]=<value>
OVRA[SPI(<n>)]=<value>
OVRA[S<n>]=<value>
Meaning
OVR:
OVRRAP:
OVRA:
<axis>:
SPI(<n>)/S<n>:
<value>:
8.7 Programmable acceleration override (ACC) (option)
In critical program sections, it may be necessary to limit the acceleration to below the maximum
values, e.g. to prevent mechanical vibrations from occurring.
The programmable acceleration override can be used to modify the acceleration for each path
axis or spindle via a command in the NC program. The limit is effective for all types of
interpolation. The values defined in the machine data apply as 100% acceleration.
Syntax
ACC[<axis>]=<value>
ACC[SPI(<n>)]=<value>
ACC(S<n>)=<value>
Deactivate:
ACC[...]=100
118
Feedrate modification for path feedrate F
Feedrate modification for rapid traverse velocity
Feedrate modification for positioning feedrate FA or for spindle speed S
Axis identifier (positioning or geometry axis)
Spindle identifier
SPI(<n>) and S<n> are identical in terms of function.
Spindle number
<n>:
Note:
SPI converts spindle numbers into axis identifiers. The transfer parameter
(<n>) must contain a valid spindle number.
Feedrate modification in percent
The value refers to or is combined with the feedrate override set on the
machine control panel.
Range of values: ... 200%, integers
Note:
With path and rapid traverse override, the maximum velocities set in the
machine data is not overshot.
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Fundamentals