HEIDENHAIN TNC 640 (34059x-05) Cycle programming User Manual
Page 127
THREAD DRILLING/MILLING (Cycle 264, DIN/ISO: G264)
4.8
4
TNC 640 | User's Manual Cycle Programming | 1/2015
127
Upper advanced stop distance Q258 (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. 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. Input range 0.000 to
99999.999
Depth at front Q358 (incremental): Distance
between tool tip and the top surface of the
workpiece for countersinking at front. Input range
-99999.9999 to 99999.9999
Countersinking offset at front Q359 (incremental):
Distance by which the TNC moves the tool center
away from the hole center. Input range 0 to
99999.9999
Set-up clearance Q200 (incremental): Distance
between tool tip and workpiece surface. Input range
0 to 99999.9999
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 plunging Q206: Traversing speed
of the tool when moving into the workpiece in
mm/min. Input range 0 to 99999.999 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
Q239=+1.5
;THREAD PITCH
Q201=-16
;THREAD DEPTH
Q356=-20
;TOTAL HOLE DEPTH
Q253=750
;F PRE-POSITIONING
Q351=+1
;CLIMB OR UP-CUT
Q202=5
;PLUNGING DEPTH
Q258=0.2
;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
MILLING
Q512=0
;FEED RATE FOR
APPROACHING