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

Path traversing behavior
10.10 Influencing the motion control
10.10.2

Percentage velocity correction (VELOLIM)

Function
The maximum possible velocity of an axis or the maximum possible gear-stage-dependent
speed of a spindle set via machine data can be reduce with the
program or synchronized action.
Effectiveness
The function is effective:
● In the AUTOMATIC operating modes.
● On path and positioning axes.
● On spindles in spindle/axis operations
Syntax
VELOLIM[<axis/spindle>]=<value>
Meaning
VELOLIM
<axis/spindle>
<value>
486
: Command for velocity correction
: Axis or spindle whose velocity or speed limit value should be
adapted.
VELOLIM for spindles
Using machine data (MD30455 $MA_MISC_FUNCTION_MASK,
bit 6), when programming in the part program, it can be set as to
whether
or axis (bit 6 = 1) - or is able to be programmed separately for each
operating mode (bit 6 = 0). If they are to be separately effective,
then the selection is made using the identifier when programming:
 Spindle identifier
 Axis identifier, e.g. "
: Percentage correction value
The correction value refers to:
 For axes/spindles in axis operation (MD30455 bit 6 == 0):
To the configured maximum axis velocity
(MD32000 $MA_MAX_AX_VELO).
 For spindles in spindle or axis operation (MD30455 bit 6 == 1):
To the maximum speed of the active gear unit stage
(MD35130 $MA_GEAR_STEP_MAX_VELO_LIMIT[<n>])
Range of values: 1 ... 100
The value 100 does not influence the velocity or speed.
is effective independent of whether used as spindle
VELOLIM
for spindle operating modes
S<n>
", for axis operation
C
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
command in the part
VELOLIM
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