Siemens SINUMERIK 840D sl Function Manual page 466

R3: Extended stop and retract
9.2 Control-managed ESR - 840D sl only
For the same axis names of a channel and machine axis, retraction motion is executed in the
workpiece coordinate system.
Enable for retraction without geometrical interrelationship POLFMASK
The program command POLFMASK allows axes to be selected, which, when rapid lift is
activated, traverse independently to their position defined with POLF. A variable parameter list
can be used to select any number of axes for rapid lift; however, all axes must be located in
the same coordinate system.
Enable for retraction with linear relationship POLFMLIN
The language command POLFMLIN allows axes to be selected that when rapid lift is activated,
should travel to their position defined with POLFin a linear relationship. A variable parameter
list can be used to select any number of axes for rapid lift; however, all axes must be located
in the same coordinate system, (i.e. only geo axes). Between initiating retraction and the linear
relationship being reached, a path is traveled, which, although deviating from the programmed
path, does not quite reach the linear relation. If the constellation is unsuitable, this transition
may last as far as the end points programmed with POLF. The control optimizes to the shortest
possible transition.
General
The following sections are equally valid for POLFMASK and POLFMLIN.
The parameters valid at triggering time are decisive for the retraction movement. If one of these
parameters (G code, POLF, POLFMASK, POLFMLIN, Frame, etc.) changes during retraction
(block change), this change does not affect the retracting movement that has already been
started.
Before rapid lift to a fixed position can be enabled via POLFMASKorPOLFMLINa position must
have been programmed with POLF for the selected axes. There is no machine data for pre-
assigning the values of POLF.
During interpretation of POLFMASK or POLFMLIN, alarm 16016 is issued if POLF has not been
programmed.
If retraction is activated, the position for retraction can still be changed. However, it is no longer
possible to change the coordinate system and an attempt is rejected with an alarm 16015.
If POLF is programmed again after enabling retraction, the position at which this axis was first
programmed must be specified in the coordinate system, in which this axis was first
programmed.
Change coordinate system
If the coordinate system is to be changed, rapid lift must first be deactivated using
POLFMASK orPOLFMLIN, and only then can programming commence with POLF in the new
coordinate system.
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Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions