Siemens sinumerik 840d Programming Manual page 276

Tool Offsets
8
8.4 Maintain tool radius compensation at constant level, CUTCONON
840D
NCU 572
NCU 573
They are displaced, however, by the vector from the
end point of the last co block to its offset point.
The interpolation type of these blocks (linear,
circular, polynomial) is arbitrary.
The deactivation block of the compensation
suppression, i.e. the block containing CUTCONOF,
is usually corrected; it begins at the offset point of
the start point.
A linear block is inserted between this point and the
end point of the previous block, i.e. the last
programmed motion block with active CUTCONON.
Circle blocks in which the circle plane is
perpendicular to the compensation plane (vertical
circles) are treated as if CUTCONON had been
programmed in the blocks.
This implicit activation of compensation suppression
is automatically cancelled in the first motion block
which is not a circle of this type but which contains a
traversing movement in the compensation plane.
Vertical circles of this type can only occur with
circumferential milling.
Example
N10
N20 $TC_DP1[1,1]= 110
N30 $TC_DP6[1,1]= 10.
N40
N50 X0 Y0 Z0 G1 G17 T1 D1 F10000
N60
N70 X20 G42 NORM
N80 X30
N90 Y20
N100 X10 CUTCONON;
N110 Y30 CONT
N120 X-10 CUTCONOF
N130 Y20 NORM
N140 X0 Y0 G40
N150 M30
8-276
840Di
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;
;
;
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Definition of tool d1
Type
Radius
Activate compensation suppression
Insert bypass circle if necessary on deactivation
of contour suppression
No bypass circle on deactivation of TRC
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition
04.00
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