Positioning Axis Dynamic Response - Siemens SINUMERIK 840D Function Manual

POLFA(AX1, 1, 20.0); AX1 is assigned the axial retraction position 20.0 ; (absolute)
$AA_ESR_TRIGGER[AX1]=1 ; AX1 begins to retract here
POLFA(axis, type): permissible programming abbreviation
POLFA(axis, 0/1/2) ; quick deactivation/activation
No preprocessing limitation
If abbreviated notation is used and only the type is changed, make sure that the value for the
retraction position or retraction path in the application is meaningful!
The abbreviated notation should only be used in exceptional circumstances.
This particularly applies after:
A power on, the retraction path or the retraction position must be reset.
POLFA(axis, 1, $AA_POLFA[axis]) ; causes a preprocessing stop
POLFA(axis, 1); does not cause a preprocessing stop
6.4

Positioning axis dynamic response

Velocity
The positioning axes traverse at the axis-specific feedrate programmed for them. As described
under "Motion behavior and interpolation functions (Page 192)", this 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.
Feedrate override
The path and positioning axes have separate feedrate overrides. Each positioning axis can be
influenced by its own axis-specific feedrate 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.
Axes and spindles
Function Manual, 06/2019, A5E47437747B AA
WARNING
P2: Positioning axes
6.4 Positioning axis dynamic response
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