
C–AXIS FAPT FUNCTION
B–61804E–2/05
2. MACHINING DEFINITION
(MENU 4)
154
TYPE 4 (G85/G89 boring cycle)
CLEARANCE C1 =
The initial value is set to the. . . . .
value of system parameter No.
332 (clearance 1 in drilling 1).
C2 = The initial value is set to the
value of system parameter No.
333 (clearance 2 in drilling 2).
DWELL ON/OFF DW = When dwell is set to on, the. .
dwell time set in system
parameter No. 320 is output
during NC data preparation.
RPM N = V*1000/DT*PAI. . . . . . . . . . . .
(V = cutting speed value set in
the material data, DT = tool
diameter value set in the tool
data)
FEED RATE FT = The initial value is set to the. . . . . .
value of feed amount/FT in the
material data.
D
C1
C2
In 16/18–TC and 16i/18i–TA, the return speed in is twice the cutting
speed in D. In 15–TFB and 15–TTFB, the return speed in is the
same as the cutting speed in D. Reverse spindle rotation is not per-
formed at the bottom of the hole.
Note) The machining time is calculated, assuming that the return speed
in is twice the cutting speed in D.