User's Manual TNC 360 (from 259 900-11) - heidenhain

8 Cycles
8.3 SL Cycles
PILOT DRILLING (Cycle 15)
8-26
Process
Pilot drilling of holes for cutter infeed at the starting points of the subcontours.
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
Identical to cycle 1
PECKING
• 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.
Y
Fig. 8.28: Example of cutter infeed points
for PECKING
Y
R
D
Fig. 8.29: Finishing allowance
X
X
TNC 360