ZeroErr :: Rotary Actuators

ZeroErr (also known as ZeroErr Control Co., Ltd. or ZeroDifference Cloud Control Technology) is a Chinese motion control technology company founded in 2016. The company specializes in high-precision rotary actuators and magnetic encoders designed to serve as core components for modern robotics and automation systems. Its name “ZeroErr” stands for Zero Error Motion Control, reflecting its mission to deliver reliable, high-accuracy motion solutions that make robot development easier, faster, and more cost-effective.

ZeroErr positions itself as an enabler in the robotics boom by providing standardized, integrated joint modules (robotic joints) that help builders quickly construct reliable physical systems for collaborative robots (cobots), surgical robots, bionic robots, humanoid robots, exoskeletons, and industrial automation equipment. The company has a production base of 2,000 m², a team of over 50 R&D engineers, more than 60 patents and qualifications, and serves over 1,000 customer groups worldwide. It has raised multiple eight-figure RMB funding rounds and achieved a valuation exceeding RMB 1 billion (approximately USD 140 million). It maintains a presence in San Jose, California, while its core operations are in China.

Core Robot-Based Products

ZeroErr does not primarily sell complete standalone industrial robots. Instead, it focuses on highly integrated robotic joint modules and supporting components that form the “joints” of robot arms and full robotic systems.

eRob Series Rotary Actuators are the flagship products. These are all-in-one hollow-shaft servo actuators that integrate frameless torque motors, harmonic reducers (strain wave gearing), absolute magnetic encoders on both motor and output ends, servo drivers, holding brakes, and torque sensors. Key features include:

• High precision: Absolute accuracy within ±15 arcsec and repeatability improved by up to 50% in recent upgrades.
• High torque density in compact, lightweight designs.
• Strict manufacturing tolerances (concentricity <0.015mm, flatness <0.01mm).
• Multiple configurations: eRob I Series (straight/inline), eRob T Series (T-shaped/corner type with IP65 protection for easier robot arm building), and compact models like eRob 70F and eRob 80F optimized for medical and space-constrained applications.

The eCoder Series magnetic encoders provide precise position feedback essential for closed-loop control in robotic joints.

To accelerate adoption, ZeroErr offers pre-configured collaborative robot arms built with eRob T Series actuators. Four standard models are available:

• 3kg payload arm with 600mm reach
• 5kg payload arm with 900mm reach (example: 6-axis with ~805mm reach and drag-to-teach function)
• 10kg payload arm with 1300mm reach
• 20kg payload arm with 1650mm reach

These pre-built arms support payloads up to 25kg depending on configuration and are designed for rapid deployment in R&D, automation, and light industrial tasks. Videos and documentation demonstrate how combinations of specific eRob models (e.g., eRob 142T, 110T, 80T) create functional 6-axis cobots with features like linear motion control and drag-and-teach programming.

Applications and Advantages

ZeroErr components are widely used in collaborative robotics, medical/surgical robotics, bionic and humanoid robots, and general factory automation. Their modular “plug-and-play” design significantly shortens development cycles and reduces risks for robot integrators and OEMs. The company highlights CE certification for electromagnetic compatibility and the industry-first CR Certificate for humanoid robot integrated joints.

By focusing on precision motion control rather than full robot systems, ZeroErr enables customers to build customized, high-performance robots faster and more reliably. Performance upgrades, such as 30% better repeatability and 50% improved accuracy in newer versions, further strengthen its competitive edge in the rapidly growing robotics components market.

In summary, ZeroErr is a specialized motion control supplier powering the next generation of robots through high-precision, integrated rotary actuators and encoders. Its eRob series and pre-configured cobot arms provide practical, cost-effective building blocks for collaborative, medical, and humanoid robotics applications, helping manufacturers and developers bring reliable robotic solutions to market more efficiently. The company’s emphasis on quality, standardization, and customer support has established it as a key player in the global supply chain for intelligent automation hardware.