HEIDENHAIN TNC 620 User Manual page 119

THREAD MILLING/COUNTERSINKING (Cycle 263, DIN/ISO:G263)
Coordinate of workpiece surface Q203 (absolute):
Coordinate of the workpiece surface. Input range
-99999.9999 to 99999.9999
2nd set-up clearance Q204 (incremental):
Coordinate in the spindle axis at which no collision
between tool and workpiece (fixtures) can occur.
Input range 0 to 99999.9999
Feed rate for countersinking Q254: Traversing
speed of the tool during countersinking in mm/min.
Input range 0 to 99999.9999 alternatively FAUTO,
FU
Feed rate for milling Q207: Traversing speed of
the tool in mm/min while milling. Input range 0 to
99999.999 alternatively FAUTO
Feed rate for approaching Q206: Traversing
speed of the tool in mm/min while approaching.
If the thread diameters are small, you can reduce
the danger of tool breakage by using a reduced
approaching feed rate. Input range 0 to 99999.999
alternatively FAUTO
HEIDENHAIN | TNC 620 | User's manual for cycle programming | 9/2015
NC blocks
25 CYCL DEF 263 THREAD MLLNG/
CNTSNKG
Q335=10 ;NOMINAL DIAMETER
Q239=+1.5 ;THREAD PITCH
Q201=-16 ;THREAD DEPTH
Q356=-20 ;COUNTERSINKING
DEPTH
Q253=750 ;F PRE-POSITIONING
Q351=+1 ;CLIMB OR UP-CUT
Q200=2 ;SET-UP CLEARANCE
Q357=0.2 ;CLEARANCE TO SIDE
Q358=+0 ;DEPTH AT FRONT
Q359=+0 ;OFFSET AT FRONT
Q203=+30 ;SURFACE COORDINATE
Q204=50 ;2ND SET-UP
CLEARANCE
Q254=150 ;F COUNTERBORING
Q207=500 ;FEED RATE FOR
MILLING
Q512=0 ;FEED RATE FOR
APPROACHING
4
4.7
119