Keep Tool Radius Compensation Constant - Siemens SINUMERIK 840D sl Function Manual

W1: Tool offset

2.7 Keep tool radius compensation constant

For further information see the "Tools" Function Manual.
See also
Tool length compensation (Page 19)
2.7 Keep tool radius compensation constant
Meaning
The "Keep tool radius compensation constant" function is used to suppress tool radius
compensation for a number of blocks, whereby a difference between the programmed and the
actual traveled tool center path established by tool radius compensation in the previous blocks
is retained as the offset.
It can be an advantage to use this method when several traversing blocks are required during
line milling in the reversal points, but the contours produced by the tool radius compensation
(bypass strategies) are not wanted.
Activation
The "Keep tool radius compensation constant" function is activated with the G command
CUTCONON (CUTter compensation CONstant ON) and deactivated with the G command
CUTCONOF (CUTter compensation CONstant OFF).
CUTCONON and CUTCONOF form a modal G group.
The basic setting is CUTCONOF.
The function is applied independently of the type of tool radius compensation (2D-WRK, ...).
Normal case
Tool radius compensation is normally active before the compensation suppression and is still
active when the compensation suppression is deactivated again.
In the last traversing block before CUTCONON, the offset point in the block end point is
approached. All following blocks in which compensation suppression is active are traversed
without compensation. However, they are offset by the vector from the end point of the last
offset block to its offset point. These blocks can have any type of interpolation (linear, circular,
polynomial).
The deactivation block of the compensation suppression, i.e. the block that contains
CUTCONOF, is compensated normally. It starts in the offset point of the start point. One linear
block is inserted between the end point of the previous block, i.e. the last programmed
traversing block with active CUTCONON, and this point.
Circular blocks, for which the circle plane is perpendicular to the compensation plane (vertical
circles), are treated as though they had CUTCONON programmed. This implicit activation of
compensation suppression is automatically canceled in the first traversing block that contains
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Function Manual, 06/2019, A5E47435126B AA
Tools