Siemens SINUMERIK 840D sl Programming Manual page 356

Transformations
6.8 Kinematic transformation
A part program for milling a groove generally comprises the following steps:
1. Selecting a tool
2. Select
3. Select suitable coordinate offset (frame)
4. Positioning
5. Program
6. Select TRC
7. Approach block (position TRC and approach groove side)
8. Groove center line contour
9. Deselect TRC
10. Retraction block (retract TRC and move away from groove side)
11. Positioning
12.
13. Re-select original coordinate shift (frame)
Special features
● Tool radius compensation
●
● It is possible to change
● With
Note
OFFN and TRC
With TRAFO_TYPE_n = 512, the value of
With TRAFO_TYPE_n = 513, for
is then machined with (OFFN - TRC).
356
TRACYL
OFFN
TRAFOOF
TRC is not taken into account relative to the groove wall, but the programmed center of
the groove. In order that the tool moves to the left from the groove wall, instead of
should be programmed. Or specify the value of
G42
acts differently with
OFFN
is included when TRC is active,
center line from the center (see the diagram above).
and a tool, whose diameter is less than the groove width, the same groove
TRACYL
wall geometry is not generated as with a tool whose diameter is the same as the groove
width. However,
TRACYL
that the tool diameter is selected to be only slightly less than the groove width.
than it does without
TRACYL
should be reset to zero after
OFFN
within a part program. This can be used to shift the groove
OFFN
minimizes the error. To improve the precision, it is recommended
OFFN
, half the groove width is programmed. The contour
OFFN
Programming Manual, 03/2013, 6FC5398-2BP40-3BA1
with a negative sign.
OFFN
. As, even without
TRACYL
TRAFOOF
acts as an allowance for TRC.
,
G41
,
TRACYL OFFN
.
Job Planning