HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 344)

344 Cycles: Turning
13.20 AXIAL RECESSING EXTENDED (Cy
c
le 872)
Finishing cycle run
The TNC uses the tool position as cycle starting point when a cycle is
called. If the Z coordinate of the starting point is less than Q492
CONTOUR START IN Z
, the TNC positions the tool in the Z coordinate to
Q492 and begins the cycle there.
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 returns the tool at rapid traverse.
4 The TNC positions the tool at rapid traverse to the second slot side.
5 The TNC finishes the side wall of the slot at the defined feed rate
Q505
.
6 The TNC finishes one half of the slot at the defined feed rate.
17 The TNC positions the tool at rapid traverse to the first side.
8 The TNC finishes the other half of the slot at the defined feed rate.
9 The TNC positions the tool at rapid traverse back to the cycle
starting point.
Please note while programming:
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).