Constant Traversing Time (Channel-Specific); General Information - Siemens SINUMERIK 840D Function Manual

B2: Acceleration and jerk
12.2 Functions
Axis-specific initial setting
Acceleration without jerk limitation can be set as the axis-specific initial setting for single-axis
movements:
MD32420 $MA_JOG_AND_POS_JERK_ENABLE = FALSE
Reset behavior
The axis-specific initial setting is activated via a reset:
MD32420 $MA_JOG_AND_POS_ENABLE
12.2.2

Constant traversing time (channel-specific)

12.2.2.1

General Information

Overview
For acceleration without jerk limitation, an acceleration jump of 2 * a
from acceleration and braking. To prevent this acceleration jump, a channel-specific constant
traversing time can be parameterized. The constant traversing time specifies the time for
constant velocity traversing between the acceleration and the braking phase:
MD20500 $MC_CONST_VELO_MIN_TIME (minimum time with constant velocity)
Note
Constant traversing time does not act for:
● Active function: LookAhead
● In traversal blocks with a traversal time less than or equal to the interpolation cycle.
352
occurs when changing
max
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA