Jerk Filter (Axis-Specific); General Information - Siemens SINUMERIK 840D sl Function Manual

B2: Acceleration
5.2 Functions
Note
The velocity-dependent jerk adaptation is only active, if:
MD32439 $MA_MAX_AX_JERK_FACTOR > 1.0
Example
Example of parameter assignment:
● MD32437 $MA_AX_JERK_VEL0 = 3000 mm/min
● MD32438 $MA_AX_JERK_VEL1 = 6000 mm/min
● MD32439 $MA_MAX_AX_JERK_FACTOR[AX1] = 2.0
● MD32439 $MA_MAX_AX_JERK_FACTOR[AX2] = 3.0
● MD32439 $MA_MAX_AX_JERK_FACTOR[AX3] = 1.0
Effect
● The velocity-dependent jerk adaptation becomes active for the 1st and 2nd axis, while the
function for the 3rd axis is not active.
● The parameterized jerk is effective at axis velocities in the range of 0 to 3000 mm/min.
● The maximum jerk is linearly increased for axis velocities in the range 3000 mm/min to
6000 mm/min.
● The maximum permitted jerk of the 1st axis is, for axis velocities greater than 6000 mm/
min, increased by a factor of 2 - for the 2nd axis, by factor of 3.
● The parameterized values apply in each dynamic response mode.
5.2.18

Jerk filter (axis-specific)

5.2.18.1

General Information

Overview
In certain application scenarios, e.g. when milling free-form surfaces, it may be beneficial to
smooth the position setpoint characteristics of the machine axes. This enables surface quality
to be improved by reducing the mechanical vibrations generated in the machine.
For the purpose of smoothing the position setpoint characteristic of a machine axis, a jerk filter
can be activated at position controller level, independently of the channel- and axis-specific
jerk limitations taken into account at interpolator level.
The effect of the jerk filter must be as strong as possible without having an unacceptable impact
on contour accuracy. The filter should also have as "balanced" a smoothing effect as possible,
i.e. if the same contour is traversed forwards and backwards, the contour smoothed by the
filter should be as similar as possible in both directions.
270
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions