HEIDENHAIN TNC 320 (34055x-06) Cycle programming User Manual

Page 78

Fixed Cycles: Drilling

3.8

UNIVERSAL PECKING (Cycle 205, DIN/ISO: G205)

TNC 320 | User's Manual Cycle Programming | 5/2013

Lower advanced stop distance Q259 (incremental):
Set-up clearance for rapid traverse positioning
when the TNC moves the tool again to the current
plunging depth after retraction from the hole;
value for the last plunging depth. Input range 0 to
99999.9999

Infeed depth for chip breaking Q257
(incremental): Depth at which the TNC carries out
chip breaking. No chip breaking if 0 is entered. Input
range 0 to 99999.9999

Retraction rate for chip breaking Q256
(incremental): Value by which the TNC retracts the
tool during chip breaking. The TNC retracts the tool
at a feed rate of 3000 mm/min. Input range 0.1000
to 99999.9999.

Dwell time at depth Q211: Time in seconds that
the tool remains at the hole bottom. Input range 0 to
3600.0000

Deepened starting point Q379 (incremental with
respect to the workpiece surface): Starting position
of drilling if a shorter tool has already pilot drilled
to a certain depth. The TNC moves at the

feed

rate for pre-positioning from the set-up clearance
to the deepened starting point. Input range 0 to
99999.9999

Feed rate for pre-positioning Q253: Traversing
velocity of the tool during positioning from the set-
up clearance to a deepened starting point in mm/
min. Effective only if Q379 is entered not equal to
0. Input range 0 to 99999.999, alternatively

FMAX,

FAUTO