Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 334

14. USING A DIRECT DRIVE MOTOR
14. USING A DIRECT DRIVE MOTOR
CAUTION
14.1 Functions and configuration
14.1.1 Summary
The fields of semiconductor/LCD manufacturing systems, mounters, and others have strong demands for high
accuracy and high efficiency. Therefore, the number of systems using a direct drive motor for a drive axis has
been increasing. The direct drive servo system includes the following features.
(1) Performance
(a) The direct drive servo system ensures the high-rigidity and the high-torque. A high-resolution encoder
enables the high-accuracy control.
(b) The high-resolution encoder contributes to the high-accuracy indexing.
(c) Since transmission mechanism is no longer required, no backlash occurs. In addition, the settling time is
reduced, and the high-frequency operation is enabled.
(d) Since transmission mechanism is no longer required, the direct drive motor does not deteriorate with
time.
The drive motor is available for servo amplifiers of which software version is B3 or
above.
When using the direct drive motor, read the following items of SSCNET interface
Direct Drive Servo MR-J3- B-RJ080W Instruction Manual (SH(NA)030079).
Safety Instructions
2. DIRECT DRIVE MOTOR
8. CHARACTERISTICS (except Overload protection characteristics and Dynamic
brake characteristics)
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