Deselecting Overlaid Movements (Drfof, Corrof) - Siemens SINUMERIK 840D sl Programming Manual

Coordinate transformations (frames)

12.10 Deselecting overlaid movements (DRFOF, CORROF)

12.10 Deselecting overlaid movements (DRFOF, CORROF)
Function
The additive work offsets set by means of handwheel traversal (DRF offsets) and the position
offsets programmed using system variable $AA_OFF[<axis>] can be deselected using the
part program commands DRFOF and CORROF.
Deselection triggers a preprocessing stop and the position component of the deselected
overlaid movement (DRF offset or position offset) is written to the position in the basic
coordinate system (in other words, no axes are traversed). The value of system variable
$AA_IM[<axis>] (current machine coordinate system setpoint of an axis) does not change;
the value of system variable $AA_IW[<axis>] (current workpiece coordinate system setpoint
of an axis) does change, because it now contains the deselected component from the
overlaid movement.
Syntax
DRFOF
CORROF(<axis>,"<character string>"[,<axis>,"<character string>"])
Significance
DRFOF:
CORROF:
Note
CORROF is only possible from the part program, not via synchronized actions.
374
Command for the deactivation (deselection) of DRF handwheel offsets for all
active axes in the channel
Active: modal
Command for the deactivation (deselection) of the DRF offset/position offset
($AA_OFF) for individual axes
Effective: modal
Axis identifier (channel, geometry or machine axis identifier)
<axis>:
"<character
string>":
DRF offset of axis is deselected
== "DRF":
$AA_OFF position offset of axis is
== "AA_OFF":
deselected
Programming Manual, 09/2011, 6FC5398-1BP40-2BA0
Fundamentals