Mitsubishi Electric MELSERVO-J4 is an AC servo system that pairs MR-J4 servo amplifiers with HG rotary servo motors. It combines with Mitsubishi Electric motion controllers, programmable controllers, and graphic operation terminals for high-speed, high-precision machine control.

Servo amplifier features

• 2.5 kHz speed frequency response.
• One-touch tuning for servo gain adjustment, with vibration suppression control and a robust filter.
• Safe torque off (STO) built in.
• MR-J4-A/-A-RJ general-purpose interface: pulse train, analog voltage, and RS-422/RS-485 (MODBUS RTU on MR-J4-A-RJ).
• MR-J4-B/-B-RJ for SSCNET III/H motion networks.
• Power monitoring of driving and regenerative power with MR Configurator2.

Multi-axis servo amplifiers

• MR-J4W2-B (2-axis) and MR-J4W3-B (3-axis) servo amplifiers on SSCNET III/H, designed by Mitsubishi for energy-saving, compact machines at lower cost.
• MR-J4W2-B needs 26% less installation space than two MR-J4-B units; MR-J4W3-B needs 30% less than three units.
• The 3-axis type cuts wiring by approximately 50%, and regenerative energy from one axis can be used to drive the other axes.

Servo motor features

• HG-KR (small capacity, low inertia), HG-MR (ultra-low inertia), HG-SR (medium capacity, medium inertia), HG-JR (medium/large capacity, low inertia), HG-RR (medium capacity, ultra-low inertia), HG-UR (flat type), and HG-AK (ultra-compact, ultra-small capacity) rotary servo motors.
• 22-bit (4,194,304 pulses/rev) absolute position encoder as standard; 18-bit on HG-AK.
• Ingress protection IP65 on HG-KR, HG-MR, HG-RR, and HG-UR, IP67 on HG-SR and HG-JR, and IP55 on HG-AK (shaft-through portion excluded; some HG-JR models are IP44).
• Reduced torque ripple for smooth rotation at low speed.

Model families

• MR-J4-A / MR-J4-A-RJ (general-purpose interface), 200 V, 0.1–22 kW: MR-J4-10A, 20A, 40A, 60A, 70A, 100A, 200A, 350A, 500A, 700A, 11KA, 15KA, 22KA
• MR-J4-A4 / MR-J4-A4-RJ (general-purpose interface), 400 V, 0.6–22 kW: MR-J4-60A4, 100A4, 200A4, 350A4, 500A4, 700A4, 11KA4, 15KA4, 22KA4
• MR-J4-B / MR-J4-B-RJ (SSCNET III/H), 200 V, 0.1–22 kW: MR-J4-10B, 20B, 40B, 60B, 70B, 100B, 200B, 350B, 500B, 700B, 11KB, 15KB, 22KB
• MR-J4-B4 / MR-J4-B4-RJ (SSCNET III/H), 400 V, 0.6–22 kW: MR-J4-60B4, 100B4, 200B4, 350B4, 500B4, 700B4, 11KB4, 15KB4, 22KB4
• Multi-axis: MR-J4W2-22B, 44B, 77B, 1010B; MR-J4W3-222B, 444B
• Rotary servo motors: HG-KR, HG-MR, HG-SR, HG-JR, HG-RR, HG-UR, HG-AK

MELSERVO-J5 is Mitsubishi Electric's newer servo series: see MELSERVO-J5 Series.

Related products

• MELSERVO-J5 Series
• MELSERVO-JET Series
• MELSERVO-JE Series
• MELSEC iQ-R Series
• MELSEC iQ-F Series
• MELSEC-Q Series
• GOT2000 Series
• Mitsubishi engineering software

Why choose TKK for Mitsubishi Electric products?

TKK helps factory teams source, select and support Mitsubishi Electric products with confidence, from the first quotation to long after installation.

• Official Mitsubishi Electric distributor, supplying genuine products through an authorized channel.
• Competitive, value-focused pricing for single units and project quantities.
• Ask us about current availability, and our specialists can recommend a suitable replacement if needed.
• A team of product specialists ready to advise on model selection, application and replacement.
• Dedicated, responsive after-sales service and technical support.

Contact TKK for model selection or a quotation for your machine.