Siemens SINUMERIK 840DE SL - Page 230

Detailed Description
2.10 Acceleration margin for radial acceleration (channel-specific)
Acceleration (B2)
2-18 Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
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
Path acceleration =
(1 - MD20602 $MC_CURV_EFFECT_ON_PATH_ACCEL) * MD32300 $MA_MAX_AX_ACCEL
Example
The following machine parameters apply:
• MD32300 $MA_MAX_AX_ACCEL for all geometry axes: 3 m/s
• Maximum path velocity with a path radius of 10 mm due to mechanical constraints of the
machine: 5 m/min.
The radial acceleration is calculated as follows:
D
UDGLDO

Y

SDWK
>PPLQ@
U>PP@>PV

@



PV

The acceleration margin is set as follows:
0'0&B&859B())(&7B21B3$7+B$&&(/ 
D
UDGLDO
>PV

@
0'0$B0$;B$;B$&&(/>PV

@


ป

Linear motions
The acceleration margin referred to above is ineffective in the case of linear motions (linear
interpolation) without active kinematic transformation.