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Mitsubishi

Melservo J4

The MELSERVO-4 is a series by Mitsubishi Electric. It features general-purpose Digital Servo Amplifiers. The MELSERVO-J4 series provides performance and functionality improvements compared to the previous series. Its modules are designed for servo motors with high-position absolute encoders 22 bits (4194304 pulses per revolution). Besides that, the J4 line models are compatible with 2.4 kHz speed frequency response. The J4 servo motor drives support higher frequency responses than the previous series. Hence, the J4 servo amplifiers are faster and more precise than MELSERVO-J3. These amplifiers typically support three control modes: position, speed, and torque. For example, the MELSERVO-J4 amplifiers in position control mode support a peak pulse train of up to 4 Mpps. These amplifiers can also be used in speed/torque, torque/position, and position/speed control modes. The J4 amplifiers can perform various tasks due to these controls, not just pinpoint accuracy positioning and smooth speed control of machine tools. Still, it also supports line control and tension control. The J4 devices support real-time autotuning and one-touch tuning features. Thus, users can automatically change the servo gains based on the machine they are using. Moreover, the J4 products support tough drive and drive recording features. These amplifiers are compatible with the preventative maintenance function, which detect errors in machine parts while providing users with solid machine control and maintenance capability. In a nutshell, the J4 series provides powerful servo motor drives with many functions. These products meet international safety standards, are built with durable material, and come in a compact design architecture.

Collage of images depicting Melservo J4 units

MELSERVO J4 Selection Guide

Nowadays, almost every trending industry is demanding an accurate and efficient motion control system. These industries mainly include food packaging, robotics, polishing, and material handling systems. To realize these motion control systems, the MELSERVO J4 servo family offers a comprehensive solution. This family of devices relies on advanced technology to offer high functionality and high-performance solutions. This series includes human-friendly, machine-friendly, and eco-friendly products. The MR-J4 is a fantastic fit for any application due to its quality, high functionality, and ease of use.

This family offers various servo amplifiers and servo motors. Using different combinations of servo motors, along with their compatible servo amplifiers, allows you to design a unique motion control according to your system requirements. This guide discusses all product series in detail to provide help in designing your machine applications.

MELSERVO J4 Servo Amplifiers

Servo amplifiers are frequency inverters specifically designed to drive servo motors for dynamic motions. They are a component of motion control systems. This device may be utilized to handle more challenging issues, such as multiple-axis alignment in large-scale installations, as well as numerous types of motion control, like single-axis placement in micro-installations. From single-axis positioning in small production lines to multi-axis positioning in large-scale systems, a motion control system can handle a variety of positioning applications.

Through a network of linked servo amplifiers and motors, the Motion CPU manages a variety of complex motion sequences. Typical motion control system applications include bottle filling, packaging, and so on.

The MELSERVO J4 amplifier series offers five models of servo amplifiers:

  1. MR-J4-A
  2. MR-J4-B
  3. MR-J4W-B
  4. MR-J4-GF
  5. MR-J4-TM

MELSERVO J4 Servo Motors

The MELSERVO J4 series offers the following types of servo motors and their product lines.

  • Rotary Servo Motors
    • HG-KR
      • Voltage Class: 200 volts
      • Description: This product line has low-inertia motors with a small power capacity ranging from 50 to 750 watts.
    • HG-MR
      • Voltage Class: 200 volts
      • Description: This product line has motors with ultra-low inertia and a small power capacity ranging from 50 to 750 watts.
    • HG-JR
      • Voltage Class: 200 volts; 400 volts
      • Description: This product line has low-inertia motors with a medium to large power capacity ranging from 0.5 to 22 kilowatts.
    • HG-UR
      • Voltage Class: 200 volts
      • Description: This product line has flat-type motors with a medium power capacity ranging from 0.75 to 5 kilowatts.
    • HG-RR
      • Voltage Class: 200 volts
      • Description: This product line has motors with ultra-low inertia and a medium power capacity ranging from 1 to 5 kilowatts.
    • HG-SR
      • Voltage Class: 200 volts; 400 volts
      • Description: This product line has medium-inertia motors with a medium power capacity ranging from 0.5 to 7 kilowatts.
    • HG-AK
      • Voltage Class: 24 volts DC; 48 volts DC
      • Description: This product line has ultra-compact-sized motors with an ultra-small power capacity ranging from 10 to 30 watts.
  • Linear Servo Motors
    • LM-K2
      • Description: Core-type servo motor featuring magnetic attraction counterforce
    • LM-F
      • Description: Compact core motor
    • LM-U2
      • Description: Coreless linear servo motor
    • LM-H3
      • Description: Space-saving servo motor
  • Direct Drive Motors
    • TF - RFM
      • Compact and low-profile servo motor

Features of MR-J4 Amplifiers

The MR-J4 servo amplifier series offers the following features.

  1. Communication Interfaces:

The MR-J4 series of products supports a vast array of communication interfaces. These interfaces include the Serial RS-422, USB, SSCNET III, CC-Link IE-Field, Ethernet/IP, EtherCAT, and PROFINET interfaces.

CC-Link IE Field Network Basic enables quicker network integration of Ethernet devices as it has a software-based cyclic communications stack and does not require a separate ASIC, lowering implementation costs for device partners. This All-in-One Network can manage simultaneously multiple controls such as distributed, input/output, and motion control. The CC-Link IE Field Network creates the ideal network by connecting field devices like servo amplifiers, programmable controllers, input /output modules, high-speed counter modules, inverters, and LCDs/displays.

SSCNET III/H offers efficient central control with three times the communication speed of conventional communication, synchronous communication for printing and food processing industries requiring deterministic control, and smooth control with a cycle time of 0.222 milliseconds, improved Noise Tolerance by Optical Communication, and long-distance wiring up to 3200 meters per system.

  1. Safety Function (STO):

The Safe Torque Off feature is supported by the MR-J4 servo amplifier series. STO is a stop function that is used to turn off energy to motors that produce torque. The power output from the servo amplifier to the servo motor is electrically switched off by the servo amplifier. This safety function offers controlled stop according to IEC 60204-1 stop category 0 and avoids sudden start-up.

  1. Control Modes:

MELSERVO J4 servo amplifiers offer the following control modes depending on the product line:

  • Position control mode: A high-speed (up to 4 megabits per second) pulse train regulator is used for the motor's speed and direction regulation. It can conduct precise positioning with a resolution of 4,194,304 pulses per revolution.
    • Compatible with all types of servo amplifiers.
  • Speed control mode: In this control mode, a speed command that can be an external analog command or a parameter-driven internal command is used for smooth regulation of the servo motor's speed and direction.
    • Compatible with all types of servo amplifiers.
  • Torque control mode: In this mode, the servo motor's torque output is controlled by an external analog or a parameter-driven internal torque command.
    • Compatible with all types of servo amplifiers.
  • Positioning mode: A point table, program, and indexer provide automatic and manual positioning modes for regular operation and even home position return using many methods, such as the dog set, count set, data set, stopper type, etc.
    • Only compatible with the RJ-type servo amplifiers.
  • Fully closed loop system: A load-side encoder is used to read a position feedback signal to provide fully closed position feedback.
    • Compatible with the MR-J4-B(-RJ) and MR-J4-A(-RJ) servo amplifiers.
  • Cyclic synchronous position mode: A position control mode uses a synchronous connection with a controller to control a servo motor when a position command is received at a fixed interval (cycle).
    • Compatible with the MR-J4-TM and MR-J4-GF servo amplifiers.
  • Cyclic synchronous velocity mode: In this speed control mode, the amplifier drives the servo motor in a synchronous connection with a controller by receiving a speed signal at a fixed interval (cycle).
    • Compatible with the MR-J4-TM and MR-J4-GF servo amplifiers.
  • Cyclic synchronous torque mode: This type of torque control mode uses synchronous communication to operate a servo motor by receiving a torque instruction at a fixed interval (cycle).
    • Compatible with the MR-J4-TM and MR-J4-GF servo amplifiers.
  • Profile position mode: A positioning operation mode in which an end position instruction is received and used to operate a servo motor in a synchronous/asynchronous connection with a controller.
    • Compatible with the MR-J4-TM servo amplifier.
  • Profile velocity mode: A mode in which a target speed signal is received and used to operate a servo motor in synchronous/asynchronous communication with a controller.
    • Compatible with the MR-J4-TM servo amplifier.
  • Profile torque mode: A target torque instruction is received to run the servo motor in a synchronous/asynchronous connection with a controller.
    • Compatible with the MR-J4-TM servo amplifier.
  • Homing mode (hm): In this mode, the servo amplifier operates a home position return operation as per the controller's instructions.
    • Compatible with the MR-J4-TM servo amplifier.
  1. Number of Control Axes:

Servo amplifiers with only one (1) axis include the MR-J4-B(-RJ), MR-J4-A(-RJ), MR-J4-GF, and MR-J4-TM. The servo amplifier with two (2) axes is the MR-J4W2-B. Additionally, the servo amplifier with three (3) axes is the MR-J4W2-B.

  1. Electrical Specifications:

The Electrical specifications of MELSERVO J4 servo amplifiers are listed below.

  • MR-J4-A(-RJ)
    • Power Supply: 3-phase 200 volts AC or 1-phase 200 volts AC for 0.75 kilowatts (kW) or smaller; 1-phase 100 volts AC for 0.4 kilowatts or smaller; 3-phase 400 volts AC for 0.6 kW and 1 kW or larger; 48 volts DC/24 volts DC for 30 watts or smaller
    • Rated Output: 0.03 kW to 22 kW
  • MR-J4-B(-RJ)
    • Power Supply: 3-phase 200 volts AC or 1-phase 200 volts AC for 0.75 kilowatts (kW) or smaller; 1-phase 100 volts AC for 0.4 kilowatts or smaller; 3-phase 400 volts AC for 0.6 kW and 1 kW or larger; 48 volts DC/24 volts DC for 30 watts or smaller
    • Rated Output: 0.03 kW to 22 kW
  • MR-J4W-B
    • Power Supply: 3-phase 200 volts AC or 1-phase 200 volts AC for 0.75 kW or smaller; 48 volts DC/24 volts DC for 30 watts or smaller
    • Rated Output: 0.03 kW to 0.4 kW
  • MR-J4-GF(-RJ)
    • Power Supply: 3-phase or 1-phase 200 VAC to 240 VAC for 0.75 kW or smaller; 1-phase 100 VAC; 3-phase 380 VAC to 480 VAC for 0.6kW and 1 kW or larger
    • Rated Output: 0.1 kW to 22 kW
  • MR-J4-TM
    • Power Supply: 3-phase 200 volts AC or 1-phase 200 volts AC for 0.75 kW or smaller; 1-phase 100 volts AC for 0.4 kilowatts or smaller; 3-phase 400 volts AC for 0.65 kW and 1 kW or larger
    • Rated Output: 0.2 kW to 22 kW
  1. Advanced Servo Gain Adjustment Function:

These servo amplifiers offer the following advanced servo gain adjustment functions.

The advanced one-touch tuning function allows operators to choose the servo gains for the smooth operation of the motor. These servo gains in these amplifiers are the following:

  • Advanced Vibration Suppression Control II: It effectively suppresses residual vibration with a relatively low frequency of 100 hertz or less generated in a motion system, allowing for a shorter settling period.
  • Robust Filter Function: It allows exceptional responsiveness and stability without the need for adjustments. With conventional control in high-inertia systems with belts and gears, like printing and packing machines, obtaining high responsiveness and stability is challenging. However, the robust filter progressively minimizes torque variation over a wide frequency range and provides more stability than the previous generation.
  • Expanded Machine Resonance Suppression Filter: This advanced filter increases the relevant frequency range from 100 - 4500 hertz to 10 - 4500 hertz. Furthermore, the number of concurrently applicable filters is enhanced from two to five, boosting a machine's vibration suppression capability.
  • Lost Motion Compensation Function: This function reduces the quadrant protrusion produced by friction and torsion during reverse operations of a servo motor, which increases the circular path's accuracy in trajectory control used in the XY table, etc.
  • Super Trace Control (STC): This function eliminates position variation during constant-velocity operation, as well as continuous acceleration/deceleration, and increases trajectory accuracy in high-rigidity machines.

Note: The lost motion compensation function and super trace control are not supported by the MR-J4W-B product line.

  1. Miscellaneous Functions:

    • Tightening and Press-Fit Control
    • Description: This function smoothly transitions from position/speed control mode to torque control mode without a halt or a rapid change in speed and torque, reducing machine load. This function is ideally suited for applications like tightening and press-fit control, as well as cap/screw tightening and so on.
    • Servo Amplifiers: MR-J4-B; MR-J4W2-B; MR-J4W3-B
    • Master/Slave Operation Function
    • Description: Through SSCNET III/H, this function allows for master axis torque transmission to the slave axes while the slave axes and master axes are controlled with the same torque. This eliminates the need for any additional wiring.
    • Servo Amplifiers: MR-J4-B
    • Scale Measurement Function
    • Description: This function allows for the transmission of position information to the drive unit (controller) of the servo motor through the servo amplifier, resulting in less wiring.
    • Servo Amplifiers: MR-J4-GF; MR-J4-B; MR-J4W2-B
    • Built-in Positioning Function
    • Description: This function allows for positioning operations to be performed via point table, program-based, and indexer techniques.
    • Servo Amplifiers: MR-J4-GF(-RJ); MR-J4-A-RJ

  2. Eco-Friendly Features:

These servo amplifiers are eco-friendly because of the following:

  • For controlling 2 or 3 servo motors, there are 2-axis and 3-axis servo amplifiers available. These servo amplifiers allow for more affordable, energy-efficient, compact devices.
  • 3-axis type servo amplifiers save space.
  • The main and control circuit power, auxiliary devices, control signal wire, and more, are connected to the three axes of a 3-axis servo amplifier using the same connectors. As a result, there are much fewer wirings and equipment.
  • The regenerative power of one axis is utilized to drive other axes when numerous servo amplifiers and drive units are linked to the MR-CV power regeneration converter unit through a common DC bus connection, helping to conserve energy. The MR-CV power regeneration converter unit contains a power regeneration mechanism that feeds the recovered energy back into the power source, allowing for further energy savings.

Features of MR-J4 Servo Motors

In this section, we will discuss each servo motor type and its product line specifications in detail.

  1. Rotary Servo Motors:

These rotary servo motors offer:

  • Accurate positioning due to the high-resolution absolute position encoder with a resolution of 262,144 or 4,194,304 pulses per revolution depending on the product line.
  • Smooth rotations and stable operation at lower speeds because of the low ripple torque profile
  • SIL 3-level functional safety
  • Parallel servo motors operation for systems with servo motors from ultra-large capacity product lines and multiple drive units
  • Support a power-saving system through the usage of a power regeneration system
  • Fewer cables connection
  • Cost-effective and easy-to-use motion control system
  • Optimized rotor structure for high speeds and high torque operations
  • Safe torque off
  • Safe stops
  • Safely limited speed
  • Safe brake control
  • Safe speed monitor
  • Speed of 1000 to 3000 revolutions per minute depending on the product line

These motors are best suited for various applications, including robotics, press machines, food packaging machines, etc.

  1. Linear Servo Motors:

Linear servo motors offer a vast array of features and benefits. These include:

  • A maximum speed of 3 meters per second
  • A thrust range of 150 Newtons to 18000 Newtons
  • Small size and high thrust due to dense windings and the optimized core and magnet geometries
  • Compact sizes and higher trust values
  • High-performance systems by combining a servo amplifier from the MELSERVO J4 series with a controller that is compatible with the CC-Link IE Field Network or SSCNET III/H
  • Higher machine performance
  • Improved productivity due to high-speed driving part
  • Easier Use
  • A simple and compact motion system with high rigidity
  • High-accuracy positioning
  • Flexible machine configurations
  • Smooth operation and clean system

These motors are highly preferred for material handling systems.

  1. Direct Drive Motors:

The direct drive motors offer the following:

  • High torque density
  • Advanced magnetic design and winding technologies
  • Extremely smooth rotation due to minimized torque ripple
  • A large hollow enclosure that permits air cooling
  • The high-resolution absolute position encoder
  • High-level structural design technology
  • A compact and low-profile design
  • Small mounting space
  • High accuracy positioning due to the direct coupling of the motor and load.
  • No mechanical transmission
  • No backlash
  • Easy maintenance.
  • System design with fewer components
  • A simple, compact, and high-rigid machine

It is suitable for low-speed and high-torque applications, such as painting and vapor deposition systems.

Browse our selection of Melservo J4 units

PDFSupply.com's online catalog offers one of the largest selections of preowned Melservo J4 units in the world.

MR-J4-100A

The Mitsubishi MR-J4-100A servo amplifier device is an advanced servo amplifier designed to ensure optimal motor control. This device is used with several Mitsubishi servo motors, and it amplifies the signals applied to the connected servo motor. The MR-J4-100A servo amplifier is commonly used with rotary types of servo motors, and it can control the motors' torque and speed ratings for applications.

We have 9 units available with prices as low as $1450.

MR-J4-100B

The Mitsubishi MR-J4-100B device is a robust servo amplifier that supports advanced control options and safety features. It can control a rotary servo motor or a direct drive motor. The MR-J4-100B servo amplifier controls the connected motor in a programmable controller system by amplifying the signals that it receives before applying them to the motor so that the motor has the signals that it needs for proper operation.

We have 10 units available with prices as low as $1397.

MR-J4-10A

The Mitsubishi MR-J4-10A Servo Amplifier is a powerful and feature-rich component designed for precise motion control in industrial applications. With its robust power output and wide voltage/frequency range compatibility, it can seamlessly integrate into various power systems. The advanced control method ensures smooth and accurate operation, while the built-in dynamic brake enables effective deceleration and stopping of the servo motor. The amplifier's communication functions and analog monitoring channels provide convenient connectivity and real-time feedback for motor performance.

We have 9 units available with prices as low as $475.

MR-J4-10B

The MR-J4-10B is a Servo Amplifier from Mitsubishi Electric's MELSERVO-J4 series. It ensures optimal servo performance in industrial applications with its sophisticated control. It can use sinusoidal wave PWM and advanced filtering, guaranteeing precise motion control. It prioritizes safety and reliability by offering a wide range of protective functions and compliance with safety standards, such as STO (Safe Torque Off). In brief, it delivers precise and reliable performance, making it an excellent choice for users.

We have 10 units available with prices as low as $490.

MR-J4-200A

The MR-J4-200A is a 1-Axis Servo Amplifier made by Mitsubishi Electric. It ensures stable driving for medium-capacity and medium-inertia induction motors. It belongs to the servo motor series with low inertia and medium/high power. This amplifier supports a rated output of 2.0 kW and a rated speed of 1000 RPM, providing reliable performance for industrial applications. The MR-J4-200A features a straight-axis shaft end compatible with various systems. Its low inertia design optimizes high-speed operations.

We have 6 units available with prices as low as $1690.

MR-J4-200B

The MR-J4-200B servo amplifier is a servo amplifier from Mitsubishi Electric's MELSERVO J4 series. It has a rated power output of 2 kW and it is part of the 200V voltage class. The MR-J4-200B servo amplifier is designed for providing precise servo motor control in industrial automation applications. It can operate with 200 to 240V AC of 3-phase main circuit power supply input voltage and with an output voltage rating of 170V AC (3-phase).

We have 15 units available with prices as low as $1690.

MR-J4-20A

The Mitsubishi MR-J4-20A servo amplifier is a high-performance amplifier designed for precise motion control applications. It belongs to the MELSERVO-J4 series and stands out as a top-level 1-axis amplifier in the industry. The MR-J4-20A amplifier offers a rated output power of 15.0 kW, making it suitable for demanding industrial applications that require both high power and accuracy. It utilizes the SSCNET III/H interface, which enables seamless communication and integration within a control system.

We have 8 units available with prices as low as $490.

MR-J4-20B

Mitsubishi's MR-J4-20B Servo Amplifier is used for motor control. It can adeptly operate through current or speed control methods. Its primary function is precisely regulating the motor's behavior in various control modes, including Position, Speed, and Torque. Its comprehensive built-in safety functions further enhance the amplifier's functionality, ensuring secure and reliable operation. Moreover, it seamlessly communicates with other components in the automation system through Mitsubishi's proprietary SSCNET III/H network.

We have 5 units available with prices as low as $890.

MR-J4-350A

The MR-J4-350A servo amplifier by Mitsubishi is a 3.5 kW-rated servo amplifier from the MELSERVO J4 series. It is a general-purpose 3-phase servo amplifier designed for operating with 200-240 VAC of input voltage. The MR-J4-350A servo amplifer features a standard fuse that is rated at 40 A, and it has a built-in regenerative resistor with a regenerative power rating of 100 Watts. This servo amplifier also has a built-in dynamic brake and a built-in USB port.

We have 1 unit available with prices as low as $3445.

MR-J4-350B

The MITSUBISHI MR-J4-350B servo driver is a high-performance servo amplifier designed for precision control and enhanced mechanical properties. This servo drive belongs to the Melservo J4 series and it operates on a 3-phase supply of 200 VAC voltage. With a rated output of 3.5 kW and support for the SSCNET III/H interface, it offers advanced synchronization capabilities and seamless integration with the servo system controller, resulting in optimized servo system performance.

We have 5 units available with prices as low as $1950.

MR-J4-40A

The MR-J4-40A Servo Amplifier belongs to the MR-J4 series by Mitsubishi. It offers motor control and protective features for the motion control system. It can apply methods such as sine-wave PWM control and built-in dynamic brake systems. Additionally, it offers a comprehensive range of protective functions, such as overcurrent shut-off, encoder error protection, and servo motor overheat protection, ensuring the safety and reliability of the motor and the entire system.

We have 29 units available with prices as low as $690.

MR-J4-40B

The MR-J4-40B is an AC servo amplifier designed and manufactured by Mitsubishi Electric Corporation. It is part of the MR-J4 series, which is targeted at offering precise and high-performance motion control in a variety of industrial applications. It has multiple control modes, communication interfaces, and safety functions to make it secure and dependable. This unit has IP20-grade protection against dust and water and an open design enclosure, and it comes with a natural cooling mechanism.

We have 27 units available with prices as low as $690.

MR-J4-60A

Mitsubishi created this MR-J4-60A as a Melservo MR-J4 range servo amplifier rated at 600 watts and 200 volts. Its primary circuit has a power supply input voltage of 200 to 240VAC and an input current rating of 3.2 amps. The MR-J4-60A servo amplifier controls six motors. This amplifier complies with RoHS. This servo amplifier is widely utilized in a variety of industries, including manufacturing, robotics, and packaging. They offer precision control over servo motors, enabling precise positioning, speed, and torque control.

We have 17 units available with prices as low as $850.

MR-J4-60B

Mitsubishi Electric has developed the MR-J4-60B as an advanced AC servo amplifier that can meet precise motor control requirements in industrial settings. This servo amplifier is part of the MELSERVO-J4 series and stands out for its superior performance and reliability. It supports an output power capacity of 600 Watts. The MR-J4-60B amplifier supports the STO function for improved safety, and it has multiple power supply choices, a built-in dynamic brake, and compact dimensions.

We have 4 units available with prices as low as $990.

MR-J4-70A

The MR-J4-70A is a servo amplifier that was manufactured by Mitsubishi as part of the MELSERVO J4 series. It is designed for general-purpose servo motor control applications and operates on a single-phase or 3-phase power supply that provides 200-240V AC of voltage. It also operates with a rated power output of 0.75 kW. The MR-J4-70A servo amplifier has a built-in regenerative resistor, and its 3-phase output voltage rating is 170V AC.

We have 10 units available with prices as low as $1250.

MR-J4-70B

The Mitsubishi MR-J4-70B is a digital servo drive specifically engineered to deliver precise control for AC servo motors. With its built-in dynamic brake, it ensures effective braking and control during industrial operations, enhancing safety and performance. The MR-J4-70B servo drive is well-suited for industrial applications that demand accurate and responsive motion control, thanks to its AC 3-phase 170 AAC output voltage supply. It provides reliable and efficient motor control, making it an excellent choice for various industrial automation systems.

We have 8 units available with prices as low as $1051.
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