Online Tool Length Offset $Aa_Toff[Index] - Siemens SINUMERIK 840Di sl Function Manual

Example
Compensate length of an active grinding wheel
%_N_DRESS_MPF
FCTDEF(1,-1000,1000,-$AA_IW[V],1)
ID=1 DO FTOC(1,$AA_IW[V],3,1)
WAITM(1,1,2)
G1 V-0.05 F0.01, G91
G1 V -...
...
CANCEL(1)
...
Note
No frequency keyword nor any condition is programmed in the synchronized action. The
FTOC action is therefore active in every interpolation cycle with no dependencies other than
$AA_IW[V].
2.4.8

Online tool length offset $AA_TOFF[Index]

Function
In conjunction with an active orientation transformer or an active tool carrier, tool length
offsets can be applied during processing/machining in real time. Changing the effective tool
length using online tool length offset produces changes in the compensatory movements of
the axes involved in the transformation in the event of changes in orientation. The resulting
velocities can be higher or lower depending on machine kinematics and the current axis
position.
The velocity at which the tool length offset is applied in the appropriate direction via
$AA_TOFF[ ], can be set using machine data:
MD21194 $MC_TOFF_VELO (speed online tool offset)
The acceleration can accordingly be modified via machine data:
MD21196 $MC_TOFF_ACCEL (acceleration online tool offset)
Synchronized actions
Function Manual, 11/2006, 6FC5397-5BP10-2BA0
2.4 Actions in synchronized actions
; Definition of the function
; Select online tool offset:
Derived from the motion of the V axis, the length 3 of
the active grinding wheel is compensated in channel 1.
; Synchronization with machining channel
; Deselect online offset
Detailed description
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