HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 401)

RECESSING CONTOUR RADIAL
(Cycle 860, DIN/ISO: G860)
12.24
12
TNC 640 | User's Manual Cycle Programming | 1/2015
401
12.24 RECESSING CONTOUR RADIAL
(Cycle 860, DIN/ISO: G860)
Application
This cycle enables you to radially cut in slots of any form.
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
starting point of the contour is larger than the end point of the
contour, the cycle runs outside machining. If the contour starting
point is less than the end point, the cycle runs inside machining.
Roughing cycle run
1 The TNC positions the tool at rapid traverse in the Z coordinate
(first cut-in position).
2 The TNC runs a paraxial infeed motion at rapid traverse (lateral
infeed = 0.8 cutting width).
3 The TNC cuts the area between the starting position and the
end point in radial direction at the defined feed rate
Q478.
4 The TNC positions the tool back at rapid traverse to the
beginning of cut.
5 The TNC repeats this process (2 to 4) until the slot form is
completed.
6 The TNC positions the tool back at rapid traverse to the cycle
starting point.