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4. PROGRAM FORMAT
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Program format T series M series
G81 R_ L_ Q_ P_ ;
G80 ; Cancels synchronization between the hob
axis and C–axis.
(Supplement) The hob function is made available
to the T series with G81.4.
R : Number of teeth (specifiable range : 1 to
5000)
L : Number of hob threads (specifiable range : 1
to 30 with a sign)
D The sign of L specifies the direction
of rotation of the C–axis.
D If L is positive, the C–axis rotates in the
positive direction (+).
D 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.
f
G81 T_ L_ Q_ P_ ; Starts synchronization.
S_ M03 (or M04) ; Starts tool axis rotation.
M05 ; Stops tool axis rotation
G80 ; Cancels synchronization.
T : Number of teeth (Specifiable range: 1 to
1000)
L : Number of hob threads
(Specifiable range: –21 to +21 with 0 ex-
cluded)
Q : Module or diametral pitch
Specify a module in the case of metric input.
(Unit: 0.00001 mm, Specifiable range: 0.01
to 25.0 mm)
Specify a diametral pitch in the case of inch
input.
(Unit: 0.00001 inch
–1
, Specifiable range:
0.01 to 25.0 inch
–1
)
P : Gear helix angle
(Unit: 0.0001 deg, Specifiable range: –90.0
to 90.0 deg.)
* When specifying Q and P, the user can use a
decimal point.
f
G81 T_ L_ Q_ P_ ; Starts synchronization.
G80 ; Cancels synchronization.
T : Number of teeth (Specifiable range : 1 to
1000)
L : Number of hob threads (Specifiable range :
–200 to 200 with 0 excluded)
Q : Module or diametral pitch
Specify a module in the case of metric input.
(Unit : 0.00001mm, Specifiable range : 0.01
to 25.0mm)
Specify a diametral in the case of inch input.
(Unit : 0.00001inch
–1
, Specifiable range :
0.01 to 25.0inch
–1
)
P : Gear helix angle
(Unit : 0.0001deg, Specifiable range : –90.0
to 90.0deg)
f