Percentage Acceleration Override (Acc Option) - Siemens SINUMERIK 840Di sl Programming Manual

Feedrate Control and Spindle Motion

7.8 Percentage acceleration override (ACC option)

7.8 Percentage 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.
You can use the programmable acceleration override to change 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 determine the 100% acceleration.
Programming
ACC[axis]=...
Or deactivate
ACC[axis]=100, program start, reset
Or
ACC[SPI(spindle)]=... or ACC(S...)
Parameters
ACC
SPI
Axis
Note
Please note that the maximum permissible values of the machine manufacturer can be
exceeded with a higher acceleration rate.
298
Change in acceleration in percent for the specified path axis or
change in speed for the specified spindle.
Range of values: 1..200%, integers
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.
Channel axis name of the path axis, e.g., with X
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals