Siemens SINUMERIK 840D sl Function Manual page 797

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Mirroring
The axis to be mirrored can be set via the following machine data:
MD10610 MIRROR_REF_AX (reference axis for the mirroring)
Value
0
1, 2 or 3
Frame chaining
The current FRAME is composed of the total basic frame, the settable FRAME, the system
frames and the programmable FRAME.
The current complete frame is calculated according to the formula below:
$P_ACTFRAME =
Frames with G91
Incremental programming with G91 is defined such that the compensation value is traversed
additively to the incrementally programmed value when a zero offset is selected.
The behavior depends on the setting in the setting data:
SD42440 $SC_FRAME_OFFSET_INCR_PROG (zero offset in frames)
Value
1
0
Suppression of frames
Current frames can be suppressed with the following instructions:
Comman
d
G53
G153
SUPA
Basic logic functions: Axes, coordinate systems, frames (K2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Significance
Mirroring is performed around the programmed axis.
Depending on the input value, mirroring is mapped onto the mirroring of a specific
reference axis and rotation of two other geometry axes.
$P_PARTFRAME : $P_SETFRAME : $P_EXTFRAME :
$P_ISO1FRAME : $P_ISO2FRAME : $P_ISO3FRAME :
$P_ACTBFRAME : $P_IFRAME : $P_TOOLFRAME :
$P_WPFRAME : $P_TRAFRAME: $P_PFRAME
$P_ISO4FRAME : $P_CYCFRAME
Significance
Zero offset is applied on FRAME and incremental programming of an axis (= default setting).
Only the programmed path is traversed.
Significance
Current zero offset (ZO)
Current frame including basic frame
Current ZO, incl. programmed offsets
Brief description
1.3 Frames
13

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