HEIDENHAIN TNC 407 (280 580) User Manual - Manual (Page 242)

8-35
8 Cycles
TNC 407/TNC 415 B/TNC 425
Fig. 8.39: Possible infeed point for
PILOT DRILLING
8.4 SL Cycles (Group II)
Y
X
PILOT DRILLING (Cycle 21)
Process
Similar to cycle 1 PECKING
Application
Cycle 21 is for PILOT DRILLING of the cutter infeed points. It accounts for
the ALLOWANCE FOR SIDE and the ALLOWANCE FOR FLOOR as well
as the radius of the rough-out tool. The cutter infeed points serve also as
starting points for roughing.
Input data
• PECKING DEPTH Q10:
Dimension by which the tool drills in each infeed
(negative sign for negative working direction)
• FEED RATE FOR PECKING Q11:
Traversing speed of the tool in mm/min during drilling
• ROUGH MILL Q13:
Tool number of the rough mill