Siemens SINUMERIK 840D sl Programming Manual page 470

Tool offsets
7.4 Online tool offset (PUTFTOCF, FCTDEF, PUTFTOC, FTOCON, FTOCOF)
Dressing program in channel 2:
Program code
...
N40 FCTDEF(1,–1000,1000,–$AA_IW[V],1)
N50 PUTFTOCF(1,$AA_IW[V],3,1)
N60 V–0.05 G1 F0.01 G91
...
N... M30
Further information
General information about online TO
In the case of a continuous write (for each interpolation cycle), following activation of the
evaluation function, each change is calculated additively in the wear memory (to prevent
setpoint jumps).
In both cases: The online tool offset can act on each spindle and lengths 1, 2 or 3 of the
wear parameters.
The lengths are assigned to the geometry axes with reference to the current working plane.
The spindle is assigned to the tool using tool data with GWPSON and TMON, unless this is the
active grinding wheel.
An offset is always applied for the wear parameters for the current tool side or for the left-
hand tool side on inactive tools.
Note
Where the offset is identical for several tool sides, the values should be transferred
automatically to the second tool side by means of a chaining rule.
If online offsets are defined for a machining channel, the wear values for the current tool in
this channel cannot be changed from the machining program or by means of an operator
action.
The online tool offset is also applied with respect to the constant grinding wheel peripheral
speed (GWPS) in addition to tool monitoring (TMON).
470
Comments
; Define function: Straight line with
gradient = 1
; Continuously write online tool
offset: Derived from the motion of
the V axis, the length 3 of the
active grinding wheel is compensated
in channel 1.
; Infeed motion for dressing, PUTFTOCF
is only effective in this block.
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
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