HEIDENHAIN CNC Pilot 4290 V7.1 - Manual (Page 224)

224
4.20 Cont
our
-Based T
u
rn
ing Cy
cles
Recessing cycle G866
G866 generates a recess defined by G22-Geo. The CNC PILOT uses
the tool definition to distinguish between external and internal
machining, or between radial and axial recesses.
Parameters
NS Block number (reference to G22-Geo)
I Oversize for roughing (default: 0)
„ I=0: Recess is made in one work step
„ I>0: The first operation is roughing, the second finishing
E Dwell time (default: Time for one spindle revolution)
„ If I=0: For every recess
„ If I>0: Only for finishing
Number of cutting passes:
Maximum offset = SBF * cutting width
(SBF: See Machining Parameter 6)
„ The tool radius compensation: is active.
„ An Oversize is not taken into account.
Cycle run
1 Calculates the number of cutting passes.
2 Approaches workpiece from starting point for first pass.
„ Radial recess: First Z, then X direction
„ Axial recess: First X, then Z direction
3 Executes the first cut according to I.
4 Returns at rapid traverse and approaches for next pass.
5 If I=0: Dwells for time E
6 Repeats 3 to 4 until the complete recess has been machined.
7 If I>0: Finish machines the contour