Industry-Leading Basic Performance

Industry-Leading Level of Servo Amplifier Basic Performance

A speed frequency response of 2.5 kHz is achieved by applying our original high-speed servo control architecture evolved from the conventional two-degrees-of-freedom model adaptive control to the dedicated execution engine. Together with a high-resolution absolute position encoder of 4,194,304 pulses/rev, fast and accurate operation is enabled. The performance of the high-end machines is utilized to the fullest.

Improving Machine Performance with High-Performance Servo Motors

With improved processing speed, the rotary servo motors equipped with a high-resolution encoder enables high-accuracy positioning and smooth rotation

A Variety of Functions for Various Applications

Tightening & Press-Fit Control

This function switches position/speed control mode to torque control mode smoothly without a stop or a sudden change in speed and torque, and thus reduces load to a machine. This function is best suit for an application where control is switched from position to torque such as Tightening & Press-fit control or insertion of a work, and cap or screw tightening.

* This function is supported by MR-J4-B/MR-J4W2-B/MR-J4W3-B.

Driver Communication Function

The controller controls the master axis by using the driver communication function of MR-J4-B servo amplifiers. The servo amplifier of the master axis transmits the torque data to the other servo amplifiers on SSCNET III/H, and the others also drive the servo motors on the basis of the torque data transmitted from the master axis. The data is transmitted via SSCNET III/H, and thus no special wiring is necessary.

Scale Measurement Function

The scale measurement function of MR-J4-GF/MR-J4-B/MR-J4W2-B^*1 servo amplifiers^*2 enables to transmit position information of a scale measurement encoder to the controller when the scale measurement encoder is connected in semi closed loop control. The data of linear or synchronous encoders are transmitted to the servo system controller via the servo amplifier, resulting in less wiring.

• *1. This function is not supported by MR-J4W2-0303B6.
• *2. Use corresponding servo amplifier (MR-J4-GF/MR-J4-GF-RJ/MR-J4-B/MR-J4-B-RJ) for load-side encoder.

Applicable for Various Control and Driving Systems

Compatible Servo Motors

• • Combinations of Rotary Servo Motors and Servo Amplifiers
  • Combinations of Linear Servo Motors and Servo Amplifiers
  • Combinations of Direct Drive Motors and Servo Amplifiers

1-axis/2-axis/3-axis Servo Amplifiers

For SSCNET III/H compatible servo amplifiers, 2-axis and 3-axis types are available in addition to 1-axis type, enabling flexible systems based on the number of control axes.

Supporting Fully Closed Loop Control

Supporting a fully closed loop control system^*1 as standard, MR-J4-GF/MR-J4-B/MR-J4-A servo amplifiers enable further precise positioning^*2.

• *1. MR-J4-GF/MR-J4-B/MR-J4-A servo amplifier is compatible with two-wire type serial linear encoders. For four-wire type serial and pulse train interface (A/B/Z-phase differential output type) linear encoders, use MR-J4-GF-RJ/MR-J4-B-RJ/MR-J4-A-RJ.
• *2. Some models do not support a fully closed loop control system.

Maximum Command Pulse Frequency

General-purpose interface compatible MR-J4-A servo amplifier supports maximum command pulse frequency of 4 Mpulses/s (when differential receiver is used).
When open collector is used, both sink and source inputs are enabled.