OpenWam was developed by Barrett Technology in the 1990s. Its core technology has been adopted by MAKO surgical robots and BURT upper‑limb rehabilitation robots.
It is a highly flexible, back‑drivable 7‑DOF cable‑driven robot. Compared with conventional robots, it eliminates gear backlash with near‑zero friction. The arm is lighter and safer for operation.
Within required workspace, the overall movement of the manipulator caused by surgical tool motion is minimized.
Static guiding force <0.5N; no spring‑back effect during fast dragging, delivering superior human‑machine interaction.
Ensures both compliance and stiffness. Clear tactile feedback is triggered upon reaching virtual boundaries without overshooting.
External impacts in directions different from constrained motion will not trigger emergency stop or damage the robot transmission mechanism.
Able to measure or estimate magnitude and direction of interaction force between end‑effector and surroundings.
Built‑in collision warning and protection for enhanced reliability, safeguarding clinical safety.
Adopts self‑developed cable‑driven joint design to break limits of conventional rigid joints. Compact form factor, high transmission efficiency, reduced inertia and shock for stable high‑load operation.
Overall control stiffness ≥30000 N/m. Excellent anti‑deformation and anti‑vibration performance, supporting high‑rigidity procedures including orthopedic osteotomy, bone cutting and prosthesis implantation.
Repeat positioning accuracy <0.05mm, absolute positioning accuracy <0.5mm. Performance comparable to world‑class orthopedic surgical robots for intra‑operative fine grinding, osteotomy and prosthesis alignment.
Superior payload within compact footprint. Supports large‑angle multi‑dimensional motions for shoulder arthroplasty, covering full surgical workflow with minimal end‑effector changes to boost efficiency.
Iteratively optimized for 2nd‑generation shoulder replacement robots. Specially adapted for spherical motion trajectories and narrow operating spaces, resolving interference and trajectory‑mismatch pain points of traditional manipulators for improved clinical fitness.
Built upon SurgeWAM compliant manipulator and optimized for shoulder arthroplasty, forming a complete robotic surgical system that delivers precise, safe and efficient clinical solutions.
Precise Positioning
Safe & Reliable
Efficient & Intelligent
Flexible Compatibility
Leveraging CableGlide™, Estun Medical builds a rehabilitation portfolio covering neurology, bedside care and orthopedics. Customized solutions are provided for patients with diverse dysfunctions, widely recognized by industry experts and end‑users.
Comprehensive Coverage
Customized Solutions
Expert Recognition
Safe & Reliable
The OpenWam teleoperation device enables robot remote control over network. With advanced force sensing, force feedback and haptic reproduction, it applies to remote surgery, tele‑diagnosis, VR, multimedia teaching and many other fields.
Cable‑driven technology originated from MIT AI Lab. Dr. Bill Townsend, recipient of the Joseph F. Engelberger Robotics Award, launched the world’s first 7‑axis haptic collaborative robot with cable transmission in 1988. In 1998, Barrett Technology founded by Dr. Townsend licensed its cable‑driven arm technology to MAKO.
In 2017, Estun invested in Barrett Technology. Estun Medical was jointly established in 2019 to localize cable‑driven technology in China for medical robots with continuous innovation.
The proprietary Transparent Dynamics™ compliant drive delivers native haptic force perception without external force sensors. Combined with differential cable‑driven mechanisms, it maximizes motion smoothness and compliance to improve operational experience and safety.
World‑class miniature servo drives and cable‑driven motors with networking capability and native back‑drivability, core enablers for force feedback. Mounted directly behind motors for FOC control and multi‑sensor fusion. Deployed in high‑end fields including medical robots, desktop collaborative robots and aerospace robotics.