HEIDENHAIN TNC 320 - Page 117

THREAD DRILLING/MILLING (Cycle 264, DIN/ISO: G264) 4.8
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HEIDENHAIN | TNC 320 | User’s manual for cycle programming | 9/2016
117
Q257 Infeed depth for chip breaking?
(incremental): Plunging depth after which the TNC
breaks the chip. No chip breaking if 0 is entered.
Input range 0 to 99999.9999
Q256 Retract dist. for chip breaking?
(incremental): Value by which the TNC retracts
the tool during chip breaking. Input range 0.000 to
99999.999
Q358 Sinking depth at front? (incremental):
Distance between tool point and the top surface of
the workpiece for countersinking at the front of the
tool. Input range -99999.9999 to 99999.9999
Q359 Countersinking offset at front?
(incremental): Distance by which the TNC moves
the tool center away from the center. Input range 0
to 99999.9999
Q200 Set-up clearance? (incremental): Distance
between tool tip and workpiece surface Input range
0 to 99999.9999
Q203 Workpiece surface coordinate? (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
Q204 2nd set-up clearance? (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999
Q206 Feed rate for plunging?: Traversing speed of
the tool in mm/min during plunging. Input range 0 to
99999.999 alternatively FAUTO, FU
Q207 Feed rate for milling?: Traversing speed of
the tool in mm/min during milling. Input range 0 to
99999.999 alternatively FAUTO
Q512 Feed rate for approaching?: Traversing
speed of the tool in mm/min while approaching.
For smaller thread diameters you can decrease
the approaching feed rate in order to reduce the
danger of tool breakage. Input range 0 to 99999.999
alternatively FAUTO
Q351=+1 ;CLIMB OR UP-CUT
Q202=5 ;PLUNGING DEPTH
Q258=0.2 ;UPPER ADV STOP DIST
Q257=5 ;DEPTH FOR CHIP
BRKNG
Q256=0.2 ;DIST FOR CHIP BRKNG
Q358=+0 ;DEPTH AT FRONT
Q359=+0 ;OFFSET AT FRONT
Q200=2 ;SET-UP CLEARANCE
Q203=+30 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP
CLEARANCE
Q206=150 ;FEED RATE FOR
PLNGNG
Q207=500 ;FEED RATE FOR
MILLNG
Q512=0 ;FEED FOR APPROACH