
B–63523EN–1/03
1. AXIS CONTROL
263
G81 T _ L _ Q _ P _ ;
T : Number of teeth (specifiable range: 1 to 5000)
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.
G81 ; Cancels synchronization between the hob axis and C–axis.
Code
<T series>
Code
<M series>
Group Function
G80.4 G80
Cancels hobbing synchronization.
G81.4 G81
Starts hobbing synchronization.
G82.4 G82
Cancels the C–axis servo delay
compensation.
G83.4 G83
Executes the C–axis servo delay
compensation.
G84.4 G84
Stores the C–axis servo delay
compensation.
Any axis can be set as the C–axis by setting the corresponding parameter
appropriately (parameter No. 7710).
The synchronization status is maintained provided:
D The interlock signal for the C–axis is turned on.
D The feed hold state exists.
Synchronization between the hob axis and C–axis can also be canceled
when:
D The power is turned off.
D An emergency stop or servo alarm occurs.
D A reset (external reset signal, reset & rewind signal, or reset key on the
MDI panel) is issued.
By setting bit 0 (HBR) of parameter No. 7700, the release of the
synchronization status by a reset can be suppressed.
D M series
Explanations
D G code list
D Setting the C–axis
D Maintaining the
synchronization status
D Releasing the
synchronization status