Percentage Velocity Correction (Velolim) - Siemens SINUMERIK 840D sl Programming Manual

Additional functions
13.12 Influencing the motion control
13.12.2

Percentage velocity correction (VELOLIM)

Function
In critical program sections, it may be necessary to limit the velocity to below maximum
values, for example, to reduce mechanical stress or enhance finish. The function only effects
path and positioning axes.
Programming
VELOLIM[axis]= ...
Parameters
VELOLIM
Axis
Value range: 1 ... 100
VELOLIM example
In the AUTOMATIC modes, the velocity limit is limited to the percentage of the velocity limit
stored in the machine data.
N70 VELOLIM[X]=80
Meaning: The axis carriage in the X direction must travel at only 80% of the velocity
permissible for the axis.
VELOLIM and JERKLIM example
N1000 G0 X0 Y0 F10000 SOFT G64
N1100 G1 X20 RNDM = 5 ACC[X] = 20
ACC[Y]=30
N1200 G1 Y20 VELOLIM[X]=5
JERKLIM[Y]=200
N1300 G1 X0 JERKLIM[X]=2
N1400 G1 Y0
M30
13-52
Percentage change for the greatest permissible
velocity relative to the value set in the machine
data for the axis
Machine axis whose velocity limit has to adapted
100 corresponds to: no effect on the velocity.
100 is applied after RESET and parts program start.
Programming Manual, 03/2006 Edition, 6FC5398-2BP10-1BA0
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