Siemens SINUMERIK 828D Programming Manual page 371

A parts program for milling a groove generally comprises the following steps:
1. Selecting a tool
2. Select
3. Select suitable coordinate offset (frame)
4. Position
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. Position
12.
13. Re-select original coordinate shift (frame)
Special features
● TRC selection:
●
● It is possible to change
● Guiding grooves:
Job planning
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
TRACYL
OFFN
TRAFOOF
TRC is not programmed in relation to the groove side, but relative to the programmed
groove center line. To prevent the tool traveling to the left of the groove side, G42 is
entered (instead of G41). You avoid this if in
negative sign.
acts differently with
OFFN
is included when TRC is active,
groove center line from the center (see diagram).
does not create the same groove for guiding grooves as it would be with a tool
TRACYL
with the diameter producing the width of the groove. It is basically not possible to create
the same groove side geometry with a smaller cylindrical tool as it is with a larger one.
minimizes the error. To avoid problems of accuracy, the tool radius should only be
TRACYL
slightly smaller than half the groove width.
Note
OFFN and TRC
With TRAFO_TYPE_n = 512, the value is effective under
With TRAFO_TYPE_n = 513, half the groove width is programmed in
retracted with OFFN-TRC.
OFFN
than it does without
TRACYL
should be reset to zero after
OFFN
within a parts program. This could be used to shift the
OFFN
6.8 Kinematic transformation
, the groove width is entered with a
. As, even without
TRACYL
TRAFOOF
as an allowance for TRC.
OFFN
OFFN
Transformations
,
TRACYL OFFN
.
. The contour is
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