
1.AXIS CONTROL B-63943EN-1/02
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1.10.4.2 Description of commands compatible with those for a
hobbing machine (G80, G81)
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.
Usually, a hobbing machine performs machining by synchronizing the
workpiece axis (usually, the C-axis) to the hobbing axis (spindle).
If there are two synchronization sets with the EGB, which
synchronization set to start with this specification method can be
specified with parameter No. 7710.
Format
G81 T_ ( L_ ) ( Q_ P_ ) ; Synchronization start
G80 ; Synchronization end
T : Number of teeth (range of valid settings: 1 to 1000)
L : Number of hob 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).
If L is 0, the direction depends on LZR, bit 3 of
parameter No. 7701.
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 : 0.00001mm, range of valid settings : 0.1 to
25.0mm)
In inch input, specify a diametral pitch
(unit : 0.00001inch
-1
, range of valid settings : 0.1 to
254.0 inch
-1
)
P : Twisted angle of a gear
(unit : 0.00001deg, range of valid settings : -90.0 to
90.0deg)
* The Q and P specifications may include the decimal
point.