Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 19.AXIS CONTROL FUNCTIONS
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19.9.7 Electronic Gear Box Automatic Phase Synchronization
When synchronization start or cancellation is specified, the EGB
(Electronic Gear Box) function does not immediately start or cancel
synchronization. Instead, it performs acceleration or deceleration.
Synchronization can be started or canceled without stopping the
rotation of the spindle.
When synchronization starts, automatic phase matching is performed
so that the position relative to the C-axis matches the position of the
one-rotation signal on the spindle. This operation is similar to the
operation at the beginning of synchronization by a one-rotation signal
in hob synchronization with conventional functions for hobbing
machine.
Format
- Acceleration/deceleration type
G81 T_ L_ R1 ; Starting synchronization
G80 R1 ; Canceling synchronization
T : Number of gear teeth (valid range: 1 to 1000)
L : Number of hob threads (valid range: -21 to +21, except 0)
When L is a positive value: The C-axis turns in the positive
direction (+)
When L is a negative value: The C-axis turns in the
negative direction (-)
- Acceleration/deceleration and automatic phase synchronization
G81 T_ L_ R2 ; Starting synchronization
G80 R2 ; Canceling synchronization
T : Number of gear teeth (valid range: 1 to 1000)
L : Number of hob threads (valid range: -21 to +21, except 0)
When L is a positive value: The C-axis turns in the positive
direction (+)
When L is a negative value: The C-axis turns in the
negative direction (-)

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