Panasonic FP7

8.3 Electronic Gear Function
8-9
8.3.3 Gear Ratio Changes while in Operation
 Precautions for gear ratio changes while the positioning unit is in operation
• If the gear ratio is changed with a new gear ratio while the electronic gear is in operation, the
new gear ratio will be effective with an elapse of a preset gear change time.
• If the gear ratio change time is 1, the gear ratio will be changed at an
acceleration/deceleration time of 0.
• Acceleration or deceleration during the gear ratio change results in linear acceleration or
deceleration. S-shaped acceleration or deceleration cannot be used.
Speed [V]
Gear ratio change time
(1 ms)
Gear ratio change time
(100 ms)
Gear ratio change request signal
Gear ratio numerator/Gear ratio denominator
200
／
100
1 100
50
／
100100
／
100
Gear ratio change time
Input speed
Output speed
Time [T]
 Programming
Follow the procedure below and write a user program in the case of changing the gear ratio
while the positioning unit is in operation.
1. Change the gear ratio.
Change the gear ratio numerator and denominator of the electronic gear in the setting area for
the electronic gear.
The gear ratio at the time of starting the positioning unit is set for this area. It is recommended
to save the initial gear ratio before change so that the initial gear ratio can be reused with
ease.
2. Turn ON the gear ratio change request contact.
Turn ON an I/O signal (electronic gear ratio change request) for the target axis allocated to
the unit.
This signal enabled is of edge type. Starts the gear ratio change triggered by the gear ratio
change request signal turned ON.
 I/O allocation
Signal name 1st axis 2nd axis 3rd axis 4th axis
Synchronous slave axis gear ratio
change request
Y90 Y91 Y92 Y93
Synchronous slave axis gear ratio
change request
X90 X91 X92 X93
Turn OFF the gear ratio change request signal after changing the gear ratio.
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