Turn Shoulder Face (Cycle 821, Din/Iso: G821); Application; Roughing Cycle Run - HEIDENHAIN TNC 640 User Manual

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Cycles: Turning | TURN SHOULDER FACE

(Cycle 821, DIN/ISO: G821)

12.11 TURN SHOULDER FACE

(Cycle 821, DIN/ISO: G821)

This cycle enables you to face turn right-angled shoulders.

You can use the cycle either for roughing, finishing or complete

machining. Turning is run paraxially with roughing.

The cycle can be used for inside and outside machining. If the tool

is outside the contour to be machined when the cycle is called, the

cycle runs outside machining. If the tool is inside the contour to be

machined, the cycle runs inside machining.

The cycle processes the area from the cycle starting point to the

end point defined in the cycle.

1 The TNC runs a paraxial infeed motion at rapid traverse. The

infeed value is calculated by the TNC with Q463 MAX. CUTTING

2 The TNC cuts the area between the starting position and the

end point in traverse direction at the defined feed rate Q478.

3 The TNC returns the tool at the defined feed rate by one infeed

4 The TNC positions the tool back at rapid traverse to the

beginning of cut.

5 The TNC repeats this process (1 to 4) until the final contour is

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

starting point.

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