HEIDENHAIN TNC 640 (34059x-04) Cycle programming - Manual (Page 383)

AXIAL RECESSING EXTENDED
(Cycle 872, DIN/ISO: G872)
13.26
13
TNC 640 | User's Manual Cycle Programming | 3/2014
383
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.
7 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 back at rapid traverse 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).