HEIDENHAIN TNC 320 (340 551-02) User Manual
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8 Programming: Cycles
8.2 Cy
cles f
o
r Dr
illing,
T
a
pping and Thr
ead Milling
8
Set-up clearance
Q200 (incremental value): Distance
between tool tip and workpiece surface.
8
Workpiece surface coordinate
Q203 (absolute
value): Coordinate of the workpiece surface.
8
2nd set-up clearance
Q204 (incremental value):
Coordinate in the tool axis at which no collision
between tool and workpiece (clamping devices) can
occur.
8
Feed rate for plunging
Q206: Traversing speed of
the tool during drilling in mm/min.
8
Feed rate for milling
Q207: Traversing speed of the
tool in mm/min while milling.
Example: NC blocks
25 CYCL DEF 264 THREAD DRILLNG/MLLNG
Q335=10
;NOMINAL DIAMETER
Q239=+1.5 ;PITCH
Q201=-16 ;DEPTH OF THREAD
Q356=-20 ;TOTAL HOLE DEPTH
Q253=750 ;F PRE-POSITIONING
Q351=+1
;CLIMB OR UP-CUT
Q202=5
;PLUNGING DEPTH
Q258=0.2 ;UPPER ADVANCED STOP DISTANCE
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 PLUNGING
Q207=500 ;FEED RATE FOR MILLNG