Siemens SINUMERIK 840D sl Function Manual page 1543

N110
N120
The tool is a turning tool. A frame rotation is activated in N80, causing the basic coordinate
system (BCS) to be rotated in relation to the workpiece coordinate system (WCS). In the WCS,
the compensation value (N70) acts on the geometry axis with index 1, i.e., on the X axis
because G18 is active. Since "_CORRMODE = 3", the tool wear in the direction of the X axis
of the WCS must become zero once N100 has been executed. The contents of the relevant
tool parameters at the end of the program are thus:
$TC_DP3[1,1]
$TC_DP4[1,1]
$TC_DP12[1,1]
$TC_DP13[1,1]
The total wear including _CORVAL is mapped onto the X' direction in the WCS. This produces
point P2. The coordinates of this point (measured in X/Y coordinates) are entered in the
geometry component of the tool. The difference vector P
thus no longer has a component in the direction of _CORVAL.
Figure 18-54 Tool length compensation, example 6
If the sample program is continued after N110 with the following instructions:
N120
N130
N140
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
t1 d1 x0 y0 z0
M30
_CORVAL[0] = 0.0
r1 = settcor(_CORVAL, "GW", 0, 3, 0)
t1 d1 x0 y0 z0
: 21.830
: 21.830
: 2.500
: -4.330
; ==> MCS position X24.330 Y0.000
Z17.500
W1: Tool offset
18.15 Examples
; ==> MCS position X24.330
Y0.000 Z17.500
; Geometry L1
; Geometry L2
; Wear L1
; Wear L2
- P remains in the wear. The wear
2 1
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