B2: Acceleration And Jerk; Brief Description; General Information; Features - Siemens SINUMERIK 840D Function Manual

B2: Acceleration and jerk

12.1

Brief description

12.1.1

General information

Scope of functions
The Description of Functions covers the following sub-functions:
● Acceleration
● Jerk
● Kneeshaped acceleration characteristic
Acceleration and jerk
The effective acceleration and jerk can be optimally matched to the machine and machining
situation concerned using axis- and channel-specific programmable maximum values,
programmable acceleration profiles in part programs and synchronized actions, and dynamic
adaptations and limitations.
Kneeshaped acceleration characteristic
The knee-shaped acceleration characteristic means that, in the case of machine axes featuring
a motor (in particular stepper motors) with a torque characteristic that is highly dependent upon
speed, acceleration can be set at the level required to ensure optimum utilization of the motor
whilst at the same time protecting it against overload.
12.1.2

Features

Acceleration
Axis-specific functions:
● Programmable maximum acceleration value
● Acceleration profile that can be selected via part-program instruction:
Acceleration without jerk limitation (BRISKA)
● Setting of maximum value using part-program instruction (ACC)
● Specific maximum value for programmed rapid traverse (G00).
● Specific maximum value for traverse with active jerk limitation
● Excessive acceleration for non-tangential block transitions
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
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