HEIDENHAIN TNC 640 (34059x-02) Cycle programming - Manual (Page 322)

Cycles: Turning
13.14 TURN, TRANSVERSE PLUNGE EXTENDED
(Cycle 824, DIN/ISO: G824)
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TNC 640 | User's Manual Cycle Programming | 5/2013
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
the contour starting point, the TNC positions the tool in the Z
coordinate to set-up clearance and begins the cycle there.
1 The TNC runs the infeed motion at rapid traverse.
2 The TNC finishes the finished part contour (contour starting
point to contour end point) at the defined feed rate
Q505.
3 The TNC returns the tool to set-up clearance at the defined feed
rate.
4 The TNC positions the tool back at rapid traverse to the cycle
starting point.
Please note while programming:
Program a positioning block to a safe position with
radius compensation
R0 before the cycle call.
The tool position at cycle call (cycle starting point)
affects the area to be machined.
The TNC takes the cutting geometry of the tool into
account to prevent damage to contour elements.
If complete machining with the active tool is not
possible, a warning is output by the TNC.
Also refer to the fundamentals of turning cycles (See
page 289).