HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 348)

348 Cycles: Turning
13.21 RECESSING CONT
OUR, AXIAL (Cy
c
le 870)
Finishing cycle run
The TNC uses the tool position as cycle starting point when a cycle is
called.
1 The TNC positions the tool at rapid traverse to the first slot side.
2 The TNC finishes the side wall of the slot at the defined feed rate
Q505
.
3 The TNC finishes one half of the slot at the defined feed rate.
4 The TNC returns the tool at rapid traverse.
5 The TNC positions the tool at rapid traverse to the second slot side.
6 The TNC finishes the side wall of the slot at the defined feed rate
Q505
.
7 The TNC finishes the other half of the slot at the defined feed rate.
8 The TNC positions the tool at rapid traverse back to the cycle
starting point.
Please note while programming:
The cutting limit defines the contour range to be
machined. The approach and departure paths can exceed
the cutting limits.
The tool position before the cycle call influences the
execution of the cutting limit. The TNC 640 machines the
area to the right or to the left of the cutting limit,
depending on which side the tool has been positioned
before the cycle is called.
Program a positioning block to the starting position with
radius compensation R0 before the cycle call.
The tool position at cycle call defines the size of the area
to be machined (cycle starting point).
Before calling the cycle you must program the cycle 14
CONTOUR GEOMETRY
to define the subprogram number.