Recessing Contour Radial (Cycle 860, Din/Iso: G860); Application; Roughing Cycle Run - HEIDENHAIN TNC 640 User Manual

Cycles: Turning | RECESSING CONTOUR RADIAL
(Cycle 860, DIN/ISO: G860)
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 For the first full recess, the TNC moves the tool at the reduced
feed rate Q511 to the depth of the plunge + allowance.
2 The TNC retracts the tool at rapid traverse.
3 The TNC performs a stepover of the value Q510 x tool width
(Cutwidth).
4 The TNC then recesses again, this time with the feed rate Q478
5 The TNC retracts the tool as per parameter Q462
6 The TNC cuts the area between the starting position and the
end point by repeating steps 2 through 4
7 As soon as the slot width has been achieved, the TNC positions
the tool at rapid traverse back to the cycle starting point.
HEIDENHAIN | User's manual for cycle programming | 10/2017
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