Siemens SINUMERIK 840D sl Programming Manual page 701

Example
Program code
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N40 TRACYL(40.)
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Further information
Program structure
A part program for milling a groove with TRACYL transformation 513 (TRACYL with groove
side offset) generally comprises the following steps:
1. Select tool.
2. Select TRACYL.
3. Select suitable coordinate offset (frame).
4. Positioning.
5. Program OFFN.
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.TRAFOOF.
13.Reselect original coordinate shift (frame).
Contour offset (OFFN)
In order to mill grooves using TRACYL transformation 513, the center line of the groove and half
of the groove width via the OFFN address are programmed in the part program.
To avoid damage to the groove side, OFFN acts only when the tool radius compensation is
active.
It is possible to change OFFN within a part program. This allows the groove center line to be
offset from the center:
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0
Comment
; Activate TRACYL with the first TRACYL data set
and working diameter 40 mm.
Work preparation
3.9 Transformations
701