HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 310)

310 Cycles: Turning
13.1
1 TURN SHOULDER F
A
CE (Cy
c
le
821)
13.11 TURN SHOULDER FACE
(Cycle 821)
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 machines the area between the starting position and the
end point in the plane 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.