HEIDENHAIN TNC 128 (77184x-01) - Manual (Page 408)

408 Drilling, boring and thread cycles
16.8 UNIVER
SAL PECKING (Cy
c
le
205)
 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
Example: NC blocks
11 CYCL DEF 205 UNIVERSAL PECKING
Q200=2 ;SET-UP CLEARANCE
Q201=-80 ;DEPTH
Q206=150 ;FEED RATE FOR PLNGNG
Q202=15 ;PLUNGING DEPTH
Q203=+100 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP CLEARANCE
Q212=0.5 ;DECREMENT
Q205=3 ;MIN. PLUNGING DEPTH
Q258=0.5 ;UPPER ADV. STOP DIST.
Q259=1 ;LOWER ADV. STOP DIST.
Q257=5 ;DEPTH FOR CHIP BRKNG
Q256=0.2 ;DIST FOR CHIP BRKNG
Q211=0.25 ;DWELL TIME AT DEPTH
Q379=7.5 ;STARTING POINT
Q253=750 ;F PRE-POSITIONING