
B–63523EN–1/03
1. AXIS CONTROL
262
Gears can be cut by turning the workpiece (C–axis) in sync with the
rotation of the spindle (hob axis) connected to a hob.
Also, a helical gear can be cut by turning the workpiece (C–axis) in sync
with the motion of the Z–axis (axial feed axis).
Spindle
C–axis
Gear material
Hob
Helical gear
G81.4 T _ L _ Q _ P _ ;
T : Number of teeth (specifiable range: 1 to 500)
L : Number of hob threads (specifiable range: 1 to 30 with a sign)
S The sign of L specifies the direction of rotation of the C–axis.
S If L is positive, the C–axis rotates in the positive direction (+).
S If L is negative, the C–axis rotates in the negative direction (–)
Q : Module or diametral pitch
For metric input, specify a module.
(Units = 0.00001 mm; specifiable range = 0.01 to 25.0 mm)
For inch input, specify a diametral pitch.
(Units = 0.00001 inch
–1
; specifiable range = 0.01 to 250.0 inch
–1
)
P : Gear helix angle
(Units = 0.0001 deg; specifiable range = –90.0 to +90.0 deg)
P and Q must be specified when a helical gear is to be cut.
G80.4 ; Cancels synchronization between the hob axis and C–axis.
1.13
HOBBING FUNCTION
(T SERIES)/
FUNCTION FOR
HOBBING MACHINE
(M SERIES)
General
Format
D T series