HEIDENHAIN TNC 640 (34059x-05) Cycle programming - Manual (Page 93)

UNIVERSAL PECKING (Cycle 205, DIN/ISO: G205) 3.8
3
TNC 640 | User's Manual Cycle Programming | 1/2015
93
Deepened starting point Q379 (incremental with
respect to the workpiece surface): Starting position
for actual drilling operation. The TNC moves at the
feed rate for pre-positioning from the set-up
clearance above the workpiece surface to the set-up
clearance above the deepened starting point. Input
range 0 to 99999.9999
Feed rate for pre-positioning Q253: Defines the
traversing speed of the tool when returning to
the plunging depth after having retracted for chip
breaking (Q256). This feed rate is also effective
when the tool is positioned to a deepened starting
point (Q379 not equal to 0). Entry in mm/min. Input
range 0 to 99999.9999 alternatively
FMAX, FAUTO
Feed rate for retraction Q208: Traversing speed
of the tool in mm/min when retracting after the
machining operation. If you enter Q208 = 0, the
TNC retracts the tool at the feed rate Q206. Input
range 0 to 99999.9999, alternatively
FMAX,FAUTO
Depth reference Q395: Select whether the entered
depth is referenced to the tool tip or the cylindrical
part of the tool. If the TNC is to reference the depth
to the cylindrical part of the tool, the point angle of
the tool must be defined in the T ANGLE column of
the tool table TOOL.T.
0 = Depth referenced to the tool tip
1 = Depth referenced to the cylindrical part of the
tool