Radial Recessing (Cycle 861, Din/Iso: G861); Application; Roughing Cycle Run - HEIDENHAIN TNC 640 User Manual

Cycles: Turning | RADIAL RECESSING
(Cycle 861, DIN/ISO: G861)
12.22 RADIAL RECESSING
(Cycle 861, DIN/ISO: G861)

Application

This cycle enables you to radially cut in right-angled slots.
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 only the area from the cycle starting point to
the end point defined in the cycle.
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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