
1.AXIS CONTROL B-63783EN-1/01
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1.12.2 Description of Commands Compatible with Those for a
Hobbing Machine
A command compatible with that for a hobbing machine can be used as
a synchronization command.
Such a command cannot be used when a canned-cycle option is
provided.
During machining, the hobbing machine synchronizes a workpiece axis
(usually the C-axis) with the hobbing axis (spindle).
When two sets are in synchronization with EGB, specify which set
starts synchronization with such a command by using parameter No.
5995.
Format
G81 T_(L_)(Q_P_); Synchronization start
G80; Synchronization end
T : Number of teeth
(range of valid settings: 1-1000)
L : Number of hub threads
(range of valid settings: -21 to +21, excluding 0)
The sign of L determines the direction of rotation for
the workpiece axis.
When L is positive, the direction of rotation for the
workpiece axis is positive (+ direction).
When L is negative, the direction of rotation for the
workpiece axis is negative (- direction).
When L is not specified, the number of hob threads is
regarded as being 1.
Q : Module or diametral pitch
In metric input, specify a module
(unit : 0.00001 mm, range of valid settings : 0.1 - 25.0
mm).
In inch input, specify a diametral pitch
(unit : 0.00001 [1/inch], range of valid settings:
0.1-254.0 [1/inch])
P :Twisted angle of a gear
(unit: 0.00001 degrees, range of valid settings : -90.0
to 90.0 degrees)
* The decimal point can be specified in Q and P.