Online Tool Length Offset; Activation Via Parts/Program/Softkey; Orientation Compression - Siemens SINUMERIK 840D sl Function Manual

1.1.9

Online tool length offset

Function
The system variable $AA_TOFF[ ] can be used to overlay the effective tool lengths in 3-D in
runtime. For an active orientation transformation (TRAORI) or for an active tool carrier that
can be oriented, these offsets are effective in the particular tool axes.
If the tool orientation changes, the tool length offsets that apply are rotated so that the pivot
point for the orientation movement always refers to the corrected tool tip.
1.1.10

Activation via parts/program/softkey

The machine data relevant to the kinematic transformation has thus far been activated mostly
through POWER ON.
Transformations MDs can also be activated via the parts program/softkey and it is not
necessary to boot the control system.
References:
/FB2/ Function Manual of Extended Functions; Kinematic Transformations (M1),
Chapter: Cartesian PTP travel
1.1.11

Orientation compression

During the execution of NC programs containing blocks with relatively short traverse paths,
the interpolation time can lead to a reduction in tool path velocity and a corresponding
increase in machining time.
COMPON, COMPCURV, COMPCAD
You can run NC programs with short traverse paths without reducing the tool path velocity by
activating "compressors" COMPON, COMPCURV or COMPCAD. The compressor also
smoothes the programmed movements and consequently tool path velocity.
Programming of direction vectors
Programming of tool orientation that is independent of the kinematics, can be achieved
through programming of direction vectors. NC programs with such direction vectors can be
executed with compressors COMPON, COMPCURV and COMPCAD.
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
F2: Multi-axis transformations
1.1 Brief description
31