Mitsubishi Electric MELSERVO-J5 MR-J5-G Series, User Manual

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10 USING A LINEAR SERVO MOTOR
10.5 Adjustment
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10
10.5
Adjustment
Auto tuning function
Although the auto tuning function during the linear servo motor operation is the same as that of the rotary servo motor, the
calculation method of the load to motor mass ratio (J ratio) is different. The load to motor mass ratio (J ratio) on the linear
servo motor is calculated by dividing the load mass by the mass of the linear servo motor primary side.
Ex.
Mass of linear servo motor primary side = 2 kg
Load mass (excluding the mass of the linear servo motor primary side) = 4 kg
Mass ratio = 4/2 = 2 times
For other servo parameters set with the auto tuning function, refer to "Auto tuning mode 1" and "Auto tuning mode 2" in the
following manual.

MR-J5 User's Manual (Adjustment)
Precautions for the auto tuning function
If the following conditions are not satisfied, the auto tuning mode 1 may not operate properly.
• Time to reach 2000 mm/s is the acceleration/deceleration time constant of 5 s or less.
• The linear servo motor speed is 50 mm/s or higher.
• The load to mass of the linear servo motor primary-side ratio is 100 times or less.
• The acceleration/deceleration thrust is 10 % or higher of the continuous thrust.
Machine analyzer function
Perform the machine analyzer function after the magnetic pole detection. If the magnetic pole detection is not performed, the
machine analyzer function may not operate properly.
The stop position at the completion of the machine analyzer function is arbitrary.