HEIDENHAIN CNC Pilot 4290 - Manual (Page 143)

HEIDENHAIN CNC PILOT 4290 131
4.7 T
u
rning Cy
cles
A, W: Approach angle, departure angle—default:
opposite from the recessing direction
Q: Sequence—default: 0
■ Q=0: Roughing and finishing
■ Q=1: Roughing only
■ Q=2: Finishing only
U: Unidirectional turning—default: 0
■ U=0: bidirectional
■ U=1: unidirectional in contour direction
H: Retraction at end of cycle—default: 0
■ H=0: Return to starting point (axial recess:
first Z and then X direction; radial recess: first
X and then Z direction)
■ H=1: Position in front of the finished contour
■ H=2: Move to clearance height and stop
Code start/end—default: 0
A chamfer/rounding arc is machined:
■ V=0: At the start and end
■ V=1: At the start
■ V=2: At end
■ V=3: No machining
O: Recessing feed rate—default: Active feed rate
E: Feed rate for finishing—default: Active feed
rate
B: Offset width—default: 0
Machining information
■ Transition from turning to recessing: Before the
transition from turning to recessing, the CNC
PILOT retracts the tool by 0.1 mm. Thus an offset
cutting edge is adjusted for the recessing
operation, independent of ”offset width B.”
■ Inside radii and chamfers: Depending on the
recessing width and the radii of rounding, single
cuts preventing a ”fluid transition” from
recessing to turning are executed before the
rounding is machined. This prevents damade to
the tool.
■ Edges: Edges are recessed. This prevents
”residual rings.”