Siemens SINUMERIK 840D sl Function Manual page 62

W1: Tool offset
2.5 2D tool radius compensation
The end position is always taken from the SAR block, no matter how many axes have been
programmed. We distinguish between the following situations:
1. No geometry axis is programmed in the SAR block.
In this case, the contour ends at point P
in the axes, which describe the machining plane, is determined by the retraction contour
(end point of the straight line or arc). The axis component perpendicular to this is defined
by DISCL. If, in this case, DISCL = 0, the movement takes place completely within the
plane.
2. Only the axis perpendicular to the machining plane is programmed in the SAR block.
In this case, the contour ends at point P
in the same way as in 1.
Retraction with SAR with simultaneous deactivation of TRC
If the SAR retraction block is also used to deactivate tool radius compensation, in the case
of 1. and 2., an additional path from P
when tool radius compensation is deactivated at the end of the retraction contour, i.e. this
point defines the tool center point and not a position on a contour to be corrected.
3. At least one axis of the machining plane is programmed.
The second axis of the machining plane can be determined modally from its last position in
the preceding block. The position of the axis perpendicular to the machining plane is
generated as described in 1. or 2., depending on whether this axis is programmed or not.
The position generated in this way defines the end point P
No special measures are required for deselection of tool radius compensation, because the
programmed point P
of the complete contour.
The start and end points of the SAR contour (P
retraction.
Velocity of the preceding block (typically G0).
All movements from point P
to the machining plane and the part of the infeed movement up to the safety clearance.
62
(or at point P
2
. The position of the two other axes is determined
1
to P
1 0
already directly defines the position of the tool center point at the end
0
to point P are performed at this velocity, i.e. the movement parallel
0 2
, if P and P
1 1 2
is inserted such that no movement is produced
.
0
and P ) can coincide on approach and
0 4
Function Manual, 06/2019, A5E47435126B AA
coincide). The position
Tools