HEIDENHAIN TNC 320 (340 55x-04) Cycle programming - Manual (Page 72)

72 Fixed Cycles: Drilling
3.6 UNIVER
SAL DRILLING
(Cy
c
le
203, DIN/ISO: G203)
U No. of breaks before retracting Q213: Number of
chip breaks after which the TNC is to withdraw the
tool from the hole for chip release. For chip breaking,
the TNC retracts the tool each time by the value in
Q256. Input range 0 to 99999
U Minimum plunging depth Q205 (incremental): If you
have entered a decrement, the TNC limits the
plunging depth to the value entered with Q205. Input
range 0 to 99999.9999
U Dwell time at depth Q211: Time in seconds that the
tool remains at the hole bottom. Input range 0 to
3600.0000
U Retraction feed rate Q208: Traversing speed of the
tool in mm/min when retracting from the hole. If you
enter Q208 = 0, the TNC retracts the tool at the feed
rate in Q206. Input range 0 to 99999.999, alternatively
FMAX, FAUTO
U Retraction rate for chip breaking Q256
(incremental): Value by which the TNC retracts the
tool during chip breaking. Input range 0.1000 to
99999.9999
Example: NC blocks
11 CYCL DEF 203 UNIVERSAL DRILLING
Q200=2 ;SETUP CLEARANCE
Q201=-20 ;DEPTH
Q206=150 ;FEED RATE FOR PLNGNG
Q202=5 ;PLUNGING DEPTH
Q210=0 ;DWELL TIME AT TOP
Q203=+20 ;SURFACE COORDINATE
Q204=50 ;2ND SETUP CLEARANCE
Q212=0.2 ;DECREMENT
Q213=3 ;BREAKS
Q205=3 ;MIN. PLUNGING DEPTH
Q211=0.25 ;DWELL TIME AT DEPTH
Q208=500 ;RETRACTION FEED RATE
Q256=0.2 ;DIST. FOR CHIP BRKNG