Acceleration Adaptation (Acc) (Axis-Specific); General Information; Programming - Siemens SINUMERIK 840D Function Manual

B2: Acceleration and jerk
12.2 Functions
12.2.3

Acceleration adaptation (ACC) (axis-specific)

12.2.3.1

General Information

Function
Using the ACC command, the currently effective maximum axis acceleration parameterized in
the acceleration-specific machine data can be reduced for a specific axis. The reduction is in
the form of a percentage factor, which is specified when programming the command.
For instance, reducing the maximum possible axis acceleration in a machining segment can be
used to prevent mechanical vibration as a result of high machining forces.
Effectiveness
Reducing the acceleration with ACC is effective for all interpolation types in the AUTOMATIC
and MDI operating modes – and for the dry run feedrate.
Acceleration reduction is not effective:
● in the JOG mode
● During the machine function REF (reference point approach).
● If, as a result of a fault that has been detected, the axis is stopped with a fast stop (setpoint
= 0).
12.2.3.2

Programming

Syntax
ACC[<axis>]=<reduction factor>
ACC[SPI(<spindle number>)]=<reduction factor>
ACC(S<spindle number>)=<reduction factor>
Meaning
<ACC>:
<axis>:
SPI(<spindle
number>):
S<spindle
number>:
354
Command for the axis-specific reduction of the currently maximum possible
acceleration, derived from the machine data
Effectiveness: Modal
Channel axis name of path axis
Data type: AXIS
Value range: Channel axis names
The SPI(...) function converts the spindle number into the corresponding
channel axis name.
Spindle name in the channel
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA