Motion Control – Electromate Introduces maxon HEJ 70 High-Efficiency Joint for Mobile Robotics
Motion Control – Mobile Robotic Joint Actuator!
Vaughan, Ontario, Canada — Motion Control – Electromate Inc., Canada’s exclusive distributor of maxon precision mechatronic components, announces the release of the HEJ 70 High-Efficiency Joint actuator. This compact, fully integrated robotic joint actuator is engineered to meet the demanding performance needs of mobile and manipulation robots.
Product Overview
The HEJ 70‑48‑50 actuator combines a torque-dense motor, planetary gearbox, 14-bit absolute encoder, and EtherCAT control electronics into a sealed, IP67-rated package. It delivers a peak torque of ±50 Nm and a maximum joint speed of 28 rad/s, with efficiencies up to 74% at 12 Nm and 26 rad/s. The actuator’s compact design (1.05 kg) and high performance make it suitable for lightweight robotic applications.
Key Specifications
- Peak Torque: ±50 Nm (future variants may exceed 60 Nm)
- Max Joint Speed: 28 rad/s @ 60 V; 22 rad/s @ 48 V
- Efficiency: Up to 74% at 12 Nm and 26 rad/s
- Ingress Protection: IP67 (sealed against dust and water)
- Voltage Range: 30–60 V DC
- Control Interface: EtherCAT (daisy-chain), PWM fan control, 1 kHz cycle rate, PDO-mapped gains
- Position Sensor: 14-bit absolute encoder, < 0.6° error
- Torque Sensing: Current-based, ± 0.8 Nm accuracy
- Backdrive Torque: ~0.5 Nm
- Output Bearing: Cross-roller bearing
Performance & Reliability
- Continuous Torque: ±19 Nm at 2 rad/s without extra cooling
- Efficiency Peak: ~74% at 12 Nm & 26 rad/s; generator efficiency reaches ~72%
- Designed for High Cycle Fatigue: 12 million impacts at 38 Nm, 100k at 50 Nm
- Operating Life Examples: Over 56,000 hours at 10 Nm, 22 rad/s
Use Cases
The HEJ 70 actuator is ideal for:
- Autonomous mobile manipulators and cobots
- Lightweight robotic arms and grippers
Quadruped and biped robots - End-effector joints, compact SCARA joints, and wearable robotics
Integration Highlights
- Ready-to-use with onboard control electronics, torque & position sensing, and active cooling system
- Simplified system architecture using EtherCAT daisy-chain; reduces external cabling
- Includes simulation models for design verification and sizing
Availability
The HEJ 70 High-Efficiency Joint actuator is available for quote in Canada through Electromate Inc. For more information or to request a quote, visit https://www.electromate.com/hej-70-high-efficiency-joint-for-mobile-robots/
About Electromate: Electromate’s Core Purpose is to help Manufacturers build better machines using differentiated motion control automation technology. They specialize in Robotic and Mechatronic Solutions for the Industrial Automation marketplace. Respected by customers as a premiere source for High Performance Automation and Motion Control Components & Systems, Electromate® specializes in AC & DC Servo and Stepper Motors & Drives, Motion & Automation Controllers, Positioning Systems & Actuators, Feedback Devices, Gearing Products and HMI’s & Operator Displays, all supported via extensive product selection, just-in-timedelivery, dedicated customer service and technical engineering support.
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For further information on this new product or others in our extensive product portfolio, call 1-877-SERVO99 (737-8699) or e-mail Warren Osak at sales@electromate.com or visit Electromate at: www.electromate.com
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