HEIDENHAIN TNC 370 User Manual page 200

8 Cycles
L
8.2 Drilling Cycles
Input data
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SET-UP CLEARANCE Q200 (incremental value):
Distance between tool tip and workpiece surface. Enter a positive
value.
DEPTH 0201 (incremental value):
Distance between workpiece surface and bottom of hole (tip of the drill
taper). Enter a negative value.
FEED RATE FOR PECKING Q206:
Traversing speed of the tool when drilling in mm/min.
PECKING DEPTH 0202 (incremental value):
lnfeed per cut. The TNC moves in one operation to the DEPTH if:
- PECKING DEPTH and DEPTH are identical
- the PECKING DEPTH is greater than the DEPTH.
- PECKING DEPTH = 0
Enter a positive value.
DWELL TIME AT TOP Q2 10:
Time in seconds which the tool spends at setup clearance, after the
TNC has withdrawn it from the hole for chip breaking.
WORKPIECE SURFACE COORDINATE Q203 (absolute value):
Coordinate of the workpiece surface.
2ND SET-UP CLEARANCE Q204 (incremental value):
Z coordinate at which no collision between tool and workpiece (clamp-
ing devices) can occur. Enter a positive value.
DECREMENT 0212 (incremental value):
Value by which the TNC decreases the pecking depth after each
pecking depth. Enter a positive value for DECREMENT.
NR OF BREAKS UNTIL RETRACTION Q2 13:
Number of chip breaks after which the TNC should withdraw the tool
from the hole for chip release.
MINIMUM PECKING DEPTH Q205 (incremental value):
If you have programmed a decrement, the TNC limits the PECKING
DEPTH to the value entered with 0205. Enter a positive value.
DWELL TIME AT DEPTH Q2 11:
Time in seconds which the tool spends at the bottom of the hole.
RETRACTION FEED RATE Q208:
Traversing speed of the tool when withdrawing from the hole in mm/
min. If Q208=0 entered, then withdraw at FMAX.
TNC 370 8-11