Parameterization; Acceleration Reserve For The Radial Acceleration (Channel-Specific); General Information - Siemens SINUMERIK 840D Function Manual

12.2.9.2

Parameterization

Excessive acceleration for non-tangential block transitions is parameterized using the axis-
specific machine data:
MD32310 $MA_MAX_ACCEL_OVL_FACTOR
(overload factor for velocity jumps)
12.2.10

Acceleration reserve for the radial acceleration (channel-specific)

12.2.10.1

General Information

Overview
In addition to the path acceleration (tangential acceleration), radial acceleration also has an
effect on curved contours. If this is not taken into account during parameterization of the path
parameters, the effective axial acceleration during acceleration and deceleration on the curved
contour can, for a short time, reach 2x the maximum value.
Effective axial acceleration =
Path acceleration + radial acceleration =
2 * ( MD32300 $MA_MAX_AX_ACCEL )
Figure 12-3
The channel-specific machine data:
MD20602 $MC_CURV_EFFECT_ON_PATH_ACCEL
(influence of path curvature on dynamic path response)
can be used to set the proportion of the axis-specific acceleration that is to be taken into
account for radial acceleration.
When, for example, a value of 0.75 is applied, 75% of the axis-specific acceleration will be
made available for radial acceleration and 25% for path acceleration.
The corresponding maximum values are generally calculated as follows:
Radial acceleration =
MD20602 $MC_CURV_EFFECT_ON_PATH_ACCEL * MD32300 $MA_MAX_AX_ACCEL
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
Radial and path acceleration on curved contours
B2: Acceleration and jerk
12.2 Functions
361