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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 MR-J4-100A servo amplifier module was manufactured by Mitsubishi Electric. This product has an open-type enclosure with an IP20 protection rating and force-cooling. It also has a dynamic brake integrated into its design. The output voltage of this servo amplifier is rated at 170 volts AC (3-phase) with an output current rated at 6.0 amperes.

We have 4 units available to ship today with prices as low as $1796.

MR-J4-100B

Part number MR-J4-100B is a Melservo J4-series servo amplifier module. This unit was produced by Mitsubishi Electric. Integrated into the architecture of this product is a dynamic brake. This device has a 170 VAC (three-phase) output voltage, as well as a 6.0-ampere output current. The power consumption of this product's control circuit power supply is 30 watts. Additionally, the MR-J4-100B's control circuit power supply has an inrush current rating of 20 to 30 amperes.

We have 6 units available to ship today with prices as low as $1397.

MR-J4-10A

Catalog number MR-J4-10A is a standard servo amplifier that is a part of the Melservo J4 line of servo amplifiers. This product was manufactured by Mitsubishi Electric. This unit is equipped with a USB port and an RS-422 port to communicate with other devices, such as servo motors and computers. It has an open enclosure with natural-cooling capabilities and an IP20 protection rating. The weight of this device is 0.8 kilograms.

We have 5 units available to ship today with prices as low as $632.

MR-J4-10B

The Mitsubishi Electric MR-J4-10B standard servo amplifier is a part of the Melservo J4 series of products. This device has a 170V AC (three-phase) output voltage and a 1.1-ampere output current. This amplifier module features a USB port for connecting the MR-J4-10B to other devices, such as personal computers and servomotors. The safety function of this product is STO (IEC/EN 61800-5-2).

We have 6 units available to ship today with prices as low as $519.

MR-J4-200A

Product number MR-J4-200A is a standard servo amplifier module. This device is a part of the Melservo J4 series of Mitsubishi Electric products. The output voltage of this amplifier is rated at 170 volts AC (3-phase), with the output current ratedat 11.0 amperes. This unit has an integrated dynamic brake, as well as a USB port for communicating with computers and other devices. The MR-J4-200A has an open-style enclosure with force-cooling capabilities and an IP20 protection rating.

We have 2 units available to ship today with prices as low as $2248.

MR-J4-200B

The MR-J4-200B from Mitsubishi Electric is a servo amplifier unit. This device has a dynamic brake built into its design, in addition to a USB communication port for connecting to computers and other devices. The output voltage of this servo amplifier is rated at 170 VAC (3-phase) with an output current rating of 11.0 amperes.

We have 2 units available to ship today with prices as low as $2248.

MR-J4-20A

Product number MR-J4-20A is a servo amplifier. This product was designed by Mitsubishi Electric to be a part of the Melservo J4 product line. This amplifier supports two (2) control methods: the sine-wave PWM control method and the current control method. The MR-J4-20A has a maximum input pulse frequency of 4 Mpps for differential receivers and 200 kpps for open collectors.

We have 4 units available to ship today with prices as low as $652.

MR-J4-20B

The MR-J4-20B servo amplifier was produced by Mitsubishi Electric. This device has an output voltage rated at 170 volts AC (3-phase). Additionally, the MR-J4-20B has an output current rated at 1.5 amperes. This servo amplifier features a built-in dynamic brake. It has various protection functions, such as Overcurrent shut-off, Overload shut-off, and more, in addition to the STO (IEC/EN 61800-5-2) safety function. The MR-J4-20B weighs approximately 0.8 kilograms.

We have 3 units available to ship today with prices as low as $1184.

MR-J4-350A

Catalog number MR-J4-350A is a standard servo amplifier with the main circuit power supply input voltage rated at 200 to 240 volts AC (3-phase) at a 50 Hz/60 Hz frequency. Additionally, the main circuit power supply of this amplifier has an input current rated at 16.0 amperes. This device has a USB port and an RS-422 port for communication purposes. The maximum input pulse frequency ratings of the MR-J4-350A include 200 kpps for open collectors and 4 Mpps for differential receivers.

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

MR-J4-350B

Product number MR-J4-350B is a servo amplifier module from Mitsubishi Electric. This unit has a rated output voltage of 170 volts AC, as well as a rated output current of 17.0 amperes. It has a USB port for connecting to a PC or other devices. The enclosure of this product is that of an open-type, with a protection rating of IP20. The MR-J4-350B has an approximate weight of 2.3 kilograms.

We have 1 unit available to ship today with prices as low as $2594.

MR-J4-40A

Catalog number MR-J4-40A from Mitsubishi Electric is a servo amplifier. It belongs to the Melservo J4 line of products. This unit features an integrated dynamic brake, as well as RS-422 and USB ports for communication purposes. It has an IP20-rated, open-type enclosure with the ability to cool itself naturally. The MR-J4-40Ashould be used exclusively in an indoor setting and away from direct sunlight.

We have 9 units available to ship today with prices as low as $918.

MR-J4-40B

Part number MR-J4-40B is a standard servo amplifier. Belonging to the Melservo J4 line of products, this device was produced by Mitsubishi Electric. This product hasa three-phase, 170-volt AC output voltage rating, in addition to a 2.8-ampere output current rating. The safety function of the MR-J4-40B is STO (IEC/EN 61800-5-2). This servo amplifier has an approximate weight of 1.0 kilogram.

We have 10 units available to ship today with prices as low as $918.

MR-J4-60A

The MR-J4-60A servo amplifier module was produced by Mitsubishi Electric. This device, which is a part of the Melservo J4 product series, has an integrated dynamic brake, as well as a USB port and an RS-422 port. This product's maximum input pulse frequency ratings consist of 4 Mpps for differential receivers and 200 kpps for open collectors. The MR-J4-60A has an open-style enclosure. This enclosure is capable of cooling the MR-J4-60A naturally. It also has a protection rating of IP20.

We have 5 units available to ship today with prices as low as $1224.

MR-J4-60B

Product number MR-J4-60B is a Mitsubishi Electric servo amplifier. This unit has a three-phase output voltage rated at 170 volts alternating current (AC), along with an output current rated at 3.2 amperes. This unit offers several protective functions, including Undervoltage protection, over-current shut-off, Overspeed protection, and much more. The temperature of the surrounding area recommended for the operation of the MR-J4-60B ranges from 0 degrees Celsius to 55 degrees Celsius. This servo amplifier has an approximate weight of 1.0 kg.

We have 1 unit available to ship today with prices as low as $1251.

MR-J4-70A

Part number MR-J4-70A is a standard servo amplifier manufactured by Mitsubishi Electric. This device has a 170-volt AC (3-phase) rated output voltage, along with a 5.8-ampere rated output current. This unit has a dynamic brake built into its design. The MR-J4-70A has an enclosure with an IP rating of IP20, is open-style, and has force-cooling capabilities. This product should exclusively be used indoors and away from direct sunlight.

We have 3 units available to ship today with prices as low as $1663.

MR-J4-70B

The MR-J4-70B servo amplifier from Mitsubishi Electric has a main circuit power supply input voltage rated at 200 to 240 volts AC (3-phase or 1-phase) at a frequency of 50 Hz/60 Hz, along with an input current rated at 3.8 amperes. Additionally, the MR-J4-70B has an output voltage rated at 170 volts AC (3-phase) with an output current rated at 5.8 amperes. The safety function of this unit is STO (IEC/EN 61800-5-2). The approximate weight of this servo amplifier is 1.4 kilograms.

We have 7 units available to ship today with prices as low as $1051.

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