Operation Manual

HEIDENHAIN CNC PILOT 640 307
4.7 Drilling cycles
Deep-hole drilling, radial
Select drilling
Select deep-hole drilling, radial
The cycle produces a bore hole on the lateral surface in several
passes. After each pass, the drill retracts and, after a dwell time,
advances again to the first pecking depth, minus the safety clearance.
You define the first pass with 1st hole depth P. The drilling depth is
reduced with each subsequent pass by the reduction value,
however, without falling below the minimum drilling depth.
Cycle parameters
X, Z Starting point
C Spindle angle (C-axis position)
X1 Start point drill (starting point of hole; default: drilling starts
from X)
X2 End point drill (end point of hole)
P 1st drilling depth (default: hole will be drilled in one pass)
IB Hole depth reduction value (default: 0)
JB Minimum hole depth (default: 1/10 of P)
B Retraction length (default: retract to starting point of hole)
E Dwell time for chip breaking at end of hole
(default:0)
D Retraction—retraction speed and infeed within the hole
(default: 0)
 0: Rapid traverse
 1: Feed rate
AB Drilling lengths (default: 0)
V Through drilling variants (default: 0)
 0: No feed rate reduction
 1: Feed rate reduction at the end of the hole
 2: Feed rate reduction at the beginning of the hole
 3: Feed rate reduction at the beginning and end of the
hole
G14 Tool change point (siehe Seite 140)
T Turret pocket number
ID Tool ID number
S Spindle speed/cutting speed
F Feed per revolution
SCK Safety clearance (siehe Seite 140)
BP Break duration: Time span for interruption of the feed. The
chip is broken by the (intermittent) interruption of the feed.
BF Break duration: Time interval until the next break. The chip
is broken by the (intermittent) interruption of the feed.