HEIDENHAIN TNC 640 (34059x-04) Cycle programming - Manual (Page 329)

TURN SHOULDER FACE
(Cycle 821, DIN/ISO: G821)
13.11
13
TNC 640 | User's Manual Cycle Programming | 3/2014
329
13.11 TURN SHOULDER FACE
(Cycle 821, DIN/ISO: G821)
Application
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.
Roughing cycle run
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
DEPTH.
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
value.
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
completed.
6 The TNC positions the tool back at rapid traverse to the cycle
starting point.