Velocity - Siemens SINUMERIK 840D sl Function Manual

11.4

Velocity

11.4
The axis-specific velocity limits and acceleration limits are valid for positioning axes.
Feed override
The path and positioning axes have separate feedrate overrides. Each positioning axis can
be adjusted by its own axis-specific feed override.
Rapid traverse override
Rapid traverse override applies only to path axes. Positioning axes have no rapid traverse
interpolation (only axial linear interpolation G01) and therefore no rapid traverse override.
feed
The positioning axes traverse at the axis-specific feedrate programmed for them. As
illustrated in section "Motion behavior and interpolation functions", the feedrate is not
influenced by the path axes.
The feedrate is programmed as an axis-specific velocity in units of min/mm, inch/min or
degrees/min.
The axis-specific feedrate is always permanently assigned to a positioning axis by the axis
name.
If a positioning axis has no programmed feedrate, the control system automatically applies
the rate set in axis-specific machine data:
MD32060 $MA_POS_AX_VELO (initial setting for positioning axis velocity).
The programmed axis-specific feedrate is active until the end of the program.
Rev. feedrate
In JOG mode the behavior of the axis/spindle also depends on the setting of SD41100
JOG_REV_IS_ACTIVE (revolutional feedrate when JOG active).
● If this setting data is active, an axis/spindle is always moved with revolutional feedrate
● If the setting data is not active, the behavior of the axis/spindle depends on SD43300
● If the setting data is not active, the behavior of a geometry axis on which a frame with
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
MD32050 $MA_JOG_REV_VELO (revolutional feedrate with JOG) or MD32040
$MA_JOG_REV_VELO_RAPID (revolutional feedrate with JOG with rapid traverse
overlay) as a function of the master spindle.
$SA_ASSIG_FEED_PER_REV_SOURCE (revolutional feedrate for positioning
axes/spindles)
rotation is effective depends on the channel-specific setting data SD42600
$SC_JOG_FEED_PER_REV_SOURCE. (In the operating mode JOG, revolutional
feedrate for geometry axes on which a frame with rotation is effective).
P2: Positioning axes
11.4 Velocity
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