Siemens SINUMERIK 840D sl Function Manual page 156

Extended functions

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Table of Contents

H1: Manual and handwheel travel

4.3 Parameter assignment (general)

With MD21166 = 0, the axis-specific limit value from MD32301 $MA_JOG_MAX_ACCEL is

effective instead of the channel-specific acceleration limitation.

With MD21166 $MC_JOG_ACCEL_GEO [<geometry axis>], there is no direct limitation to

MD32300 $MA_MAX_AX_ACCEL.

When a transformation is active, MD32300 $MA_MAX_AX_ACCEL determines the maximum

possible axis-specific acceleration.

Maximum jerk when manually traversing geometry axes

The maximum jerk when manually traversing geometry axes in the SOFT acceleration mode

(acceleration with jerk limitation) can be specified for each channel via the machine data:

MD21168 $MC_JOG_JERK_GEO [<geometry axis>]

With <geometry axis> = 0, 1, 2

With MD21168 = 0, the axis-specific limit value from MD32436 $MA_JOG_MAX_JERK is

effective instead of the channel-specific jerk limitation.

MD21168 $MC_JOG_JERK_GEO acts only when the axis-specific jerk limitation in JOG mode

has been enabled for the base machine axes:

MD32420 $MA_JOG_AND_POS_JERK_ENABLE [<axis>] == TRUE

Maximum jerk when manually traversing orientation axes

The maximum jerk when manually traversing orientation axes can be specified for each

channel via the machine data:

MD21158 $MC_JOG_JERK_ORI [<orientation axis>]

For MD21158 to take effect, the channel-specific jerk limitation for the manual traversing of

orientation axes must be enabled via the following machine data:

MD21159 $MC_JOG_JERK_ORI_ENABLE == TRUE

Orientation axes are not affected by the machine data MD32301 $MA_JOG_MAX_ACCEL and

MD32436 $MA_JOG_MAX_JERK.

Sinumerik 828d