HEIDENHAIN TNC 360 User Manual - Manual (Page 179)

TNC 360 8-26
8 Cycles
Fig. 8.28: Example of cutter infeed points
for PECKING
Fig. 8.29: Finishing allowance
8.3 SL Cycles
Y
X
Y
X
D
R
PILOT DRILLING (Cycle 15)
Process
Pilot drilling of holes for cutter infeed at the starting points of the subcon-
tours. With SL contours that consist of several overlapping surfaces, the
cutter infeed point is the starting point of the first subcontour:
• The tool is positioned above the first infeed point.
• The subsequent drilling sequence is identical to that of cycle 1
PECKING.
• The tool is then positioned above the next infeed point, and the drilling
process is repeated.
Input data
• SETUP CLEARANCE
• TOTAL HOLE DEPTH
• PECKING DEPTH
• DWELL TIME
• FEED RATE
• FINISHING ALLOWANCE
Allowed material for the drilling operation (see Fig. 8.29).
The sum of the tool radius and finishing allowance should be the same
for pilot drilling and roughing out.
Identical to cycle 1
PECKING