Programmable Acceleration Override (Acc) (Option) - Siemens SINUMERIK 828D Programming Manual

Feed control

7.7 Programmable acceleration override (ACC) (option)

7.7 Programmable acceleration override (ACC) (option)
Function
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
Syntax
ACC
<axis>
SPI(<n>)
<value>
NOTICE
With a greater acceleration rate, the values permitted by the manufacturer may be
exceeded.
140
: Acceleration change for the specified path axis or speed change
for the specified spindle.
: Channel axis name of path axis
/ : Spindle identifier
S<n>
SPI(<n>)
<n>
Note:
SPI
parameter
: Acceleration change in percent
The value refers to or is combined with the feedrate override set
on the machine control panel.
Range of values: 1 to 200%, integers
and are identical in terms of function.
S<n>
: Spindle number
converts spindle numbers into axis identifiers. The transfer
must contain a valid spindle number.
(<n>)
Programming Manual, 07/2010, 6FC5398-1BP40-0BA0
Fundamentals