Radial Recessing Extended (Cycle 862, Din/Iso: G862); Application; Roughing Cycle Run - HEIDENHAIN TNC 640 User Manual

Cycles: Turning | RADIAL RECESSING EXTENDED
(Cycle 862, DIN/ISO: G862)
12.23 RADIAL RECESSING EXTENDED
(Cycle 862, DIN/ISO: G862)

Application

This cycle enables you to radially cut in slots. Expanded scope of
function:
You can insert a chamfer or curve at the contour start and
contour end.
In the cycle you can define angles for the side walls of the slot
You can insert radii in the contour edges
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 start
diameter Q491 is larger than the end diameter Q493, the cycle
runs outside machining. If the start diameter Q491 is less than the
end diameter Q493, 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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