MELSERVO-JN Series Servo Amplifier Features
Pursuing EASY Operation and Support
Fuss-free! One-touch quick tuning
Just turn on the one-touch tuning function to automatically complete various adjustments including estimation of load to motor inertia ratio, gain adjustment and machine resonance suppression, which maximize the servo performance. (Patented)
1-phase 100VAC and 200VAC for main circuit power supply
1-phase 200VAC and 1-phase 100VAC servo amplifiers are available.
- *100VAC servo amplifier is available in 200W or smaller.
Easy power supply wiring without a screwdriver
Easy setting of electronic gear
Calculation of command pulse frequency and travel distance of the ball screw is simple since the number of command pulses per revolution of motor is set to 10000 by default. Additionally, rotation angle is controlled easily just by setting one parameter.
Example of setting
When the number of command pulses per revolution is set to 10000 (default):
10mm lead ball screw moves 1μm per pulse.
(10mm per 10000 pulses)
When the number of command pulses per revolution is set to 36000:
The servo motor rotates 0.01 degrees per pulse.
(1 degree per 100 pulses)
* This is when a gear reducer is not used.
Pursuing RELIABILITY from the Product Design Phase
Reliable operation with "tough drive function"*1
Overload tough drive function
Overload tough drive function automatically adjusts machine operation to prevent an alarm occurrence when load changes in the machine are detected, and thereby reduces time losses caused by machine stops. (Patented)
Instantaneous power failure tough drive function
When an instantaneous power failure is detected, power charged in the main circuit capacitor is supplied to keep the system running.
*Low voltage alarm may occur depending on the load conditions.
Vibration tough drive function
This function readjusts the machine resonance suppression filter automatically and prevents resonance when a machine resonance frequency is changed due to aging distortion.
- *1Tough drive function is activated by setting a parameter.
Safe maintenance due to separate power supply for main and control circuits
Because both the main circuit power supply (1-phase 200VAC or 1-phase 100VAC) and the control circuit power supply (24VDC) have the respective connectors, the main circuit power supply can be turned off separately. This makes setting parameters and performing maintenance, such as checking the machine status when an error occurs, safer.
With fanless body
The maintenance performance is improved by eliminating a cooling fan from the servo amplifier. There is no need to worry about the life of the cooling fan.
"Drive recorder function" for quick troubleshooting
This function automatically records data before and after the alarm occurrence.
The recorded data is available in graph form even after the power is off.
This enables identifying the cause of the trouble and quickly solves the issue.
This function automatically selects data to be recorded based on alarms. Information on the causes of alarm is read and monitored easily.
- *MR Configurator2 is required to display data in the drive recorder in graph form.
"Reduced Setting Space" Makes Your Manufacturing Floor More Comfortable
High performance while still being compact! Even high-accuracy positioning can be done easily!!
The servo motor is equipped with high-resolution encoder (131072pulses/rev), enabling both high-accuracy positioning and speed stability in low speed. The servo amplifier supports 1 Mpulse/s command pulse frequency, realizing high-accuracy positioning. MELSERVO-JN can be used for various applications.
MR-C series servo amplifiers can be replaced easily with the MR-JN since both of these servo amplifiers have the same mounting dimensions.
Servo amplifiers can be installed closely to each other.
The MR-JN servo amplifiers can be installed closely to each other.
- *The operation environment differs when servo amplifiers are mounted closely. For details, refer to "Servo Amplifier Specifications" and "Precautions" in MELSERVO-JN catalog.
Equipped with built-in regenerative resistor
200W or larger servo amplifiers have a built-in regenerative resistor, allowing smaller system configurations.
Large Selection of Servo Motors
Compact, high-performance servo motor HF-KN series
- Capacity: 50W to 400W
- By mounting the high-resolution incremental encoder (131072pulses/rev), both "high-accuracy positioning" and "speed stability in low speed" are enabled.
- Servo motors with electromagnetic brake are also available.
- Cables can be led out either in direction or in opposite direction of the motor shaft according to the selected cables.
- The HF-KN series servo motor is rated IP65 (excluding the shaft-through portion).
HG-KR series geared servo motors are also available
- Capacity: 50W to 400W
- HG-KR series with gear reducer are available.
G1: for general industrial machines
G5: flange output type reducer for precision applications
G7: shaft output type reducer for precision applications
These servo motors are flange mounting type. - Servo motors with electromagnetic brake are also available.
- The HG-KR series with gear reducer is rated equivalent to IP44 (excluding the shaft-through portion).
Optimal Servo Adjustment for Machines
Extended adjustment functions by the auto tuning
Advanced vibration suppression control
The residual vibration with low frequency (up to 100Hz) is suppressed automatically.
*An optimal filter is set automatically by the auto tuning function.
Adaptive filter II
High frequency machine resonance can be suppressed automatically by the one-touch tuning. Furthermore, by using the vibration tough drive function, the filter is readjusted automatically when a machine resonance is detected even after the tuning.
Various control modes
Speed/torque control operation
The speed control mode and the torque control mode are supported. (The speed and the torque commands are set internally by parameters.)
Torque limit
The torque generated by the servo motor can be controlled by setting parameters.
Setup software "MR Configurator2"
MR Configurator2 enables high-speed sampling and long-time waveform measurement.
This makes start up and adjustments of the servo system easier.
A personal computer can be connected to the servo amplifier via USB.
Built-in positioning function
Positioning without a controller
A simple positioning system can be configured without a controller since the positioning function (point table and program methods) is built into the servo amplifier, saving both costs and space.
Point table method
Position data (target position), servo motor speed, and acceleration/deceleration time constants can be easily set in a point table up to seven points. The positioning operation is started with an external interface signal and performed in accordance with the specified point table Nos.
Point table setting example
Operating example
Program method
Simple positioning programs can be created with dedicated commands. A program is executed with a start signal after selecting the program Nos. with an external interface signal. The program method enables more complex positioning operation than the point table method. Up to eight programs can be stored in the memory.
Program expamle
Operation example
- *MR Configurator2 is required to create a program.