Keep Tool Radius Compensation Constant - Siemens SINUMERIK 840D sl Function Manual
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W1: Tool offset
18.5 Tool radius compensation 2D (TRC)
18.5.10
Keep tool radius compensation constant
Description
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 tool center path traveled set up by tool radius compensation in the previous blocks is
retained as the compensation.
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
(follow strategies) are not wanted.
Activation
The "Keep tool radius compensation constant" function is activated with the G code
CUTCONON (CUTter compensation CONstant ON) and deactivated with the G code
CUTCONOF (CUTter compensation CONstant OFF).
CUTCONON and CUTCONOF form a modal G-code group.
The initial setting is CUTCONOF.
The function can be used independently of the type of tool radius compensation (2
face milling, 3D circumferential milling).
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
a traversing motion in the compensation plane and is not such a circle. Vertical circle in this
sense can only occur during circumferential milling.
Example:
N10
N20 $TC_DP1[1,1] = 110
N30 $TC_DP6[1,1]=
N40
1434
; Definition of tool d1
; Type
; Radius
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
/
D, 3D
1
2
Basic Functions
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