Finishing Cycle Run; Please Note While Programming - HEIDENHAIN TNC 640 User Manual

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Cycles: Turning | AXIAL RECESSING EXTENDED

(Cycle 872, DIN/ISO: G872)

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

3 The TNC returns the tool at rapid traverse.

4 The TNC positions the tool at rapid traverse to the second slot

5 The TNC finishes the side wall of the slot at the defined feed

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

9 The TNC positions the tool back at rapid traverse to the cycle

starting point.

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).

FUNCTION TURNDATA CORR TCS: Z/X DCW and/or an

entry in the DCW column of the turning tool table can

be used to activate an oversize for the recessing width.

DCW can accept positive and negative values and is

added to the recessing width: CUTWIDTH + DCWTab +

FUNCTION TURNDATA CORR TCS: Z/X DCW. A DCW

programmed via FUNCTION TURNDATA CORR TCS is not

visible while a DCW entered in the table is active in the

HEIDENHAIN | User's manual for cycle programming | 10/2017