To Next Page

To Previous Page

B2: Acceleration

4.2 Functions

Basic Functions

Function Manual, 09/2011, 6FC5397-0BP40-2BA0

229

4.2.9 Acceleration with active jerk limitation (SOFT/SOFTA) (axis-specific)

4.2.9.1 General Information

Function

Compared with acceleration without jerk limitation, acceleration with jerk limitation results in a certain degree of

time loss, even when the same maximum acceleration value is used. To compensate for this time loss, a specific

maximum value can be programmed for the axis-specific acceleration as far as traversing of the machine axes

with active jerk limitation (SOFT/SOFTA) is concerned.

The maximum value for acceleration with active jerk limitation is parameterized using a factor calculated in

relation to the axis-specific maximum value. This is used to generate the maximum value for axis-specific

acceleration with active jerk limitation that is taken into account by the path planning component during

preprocessing:

4.2.9.2 Parameterization

The maximum value for acceleration with active jerk limitation (SOFT/SOFTA) is parameterized using the axis-

specific machine data:

MD32434 $MA_SOFT_ACCEL_FACTOR

(scaling of the acceleration limitation with SOFT)

4.2.10 Excessive acceleration for non-tangential block transitions (axis-specific)

4.2.10.1 General Information

Function

In the case of non-tangential block transitions (corners), the programmable controller may have to decelerate the

geometry axes significantly in order to ensure compliance with the parameterized axis dynamics. For the purpose

of reducing/avoiding deceleration in connection with non-tangential block transitions, a higher level of axis-

specific acceleration can be enabled.

Excessive acceleration is parameterized using a factor calculated in relation to the axis-specific maximum value.

This is used to generate the maximum value for axis-specific acceleration with non-tangential block transitions

that is taken into account by the path planning component during preprocessing:

Acceleration[axis] =

MD32300 $MA_MAX_AX_ACCEL * MD32433 $MA_SOFT_ACCEL_FACTOR

Acceleration[axis] =

MD32300 $MA_MAX_AX_ACCEL * MD32310 $MA_MAX_ACCEL_OVL_FACTOR

Siemens SINUMERIK 828D Function Manual

Other manuals for Siemens SINUMERIK 828D