As robots take on more complex tasks, one capability is becoming more essential: the sense of touch. That’s where the force torque sensor comes in.
From delicate surgical procedures to high-speed warehouse picking, force and torque sensing gives robots the feedback they need to operate with precision, adaptability, and confidence. Thanks to recent advances, this technology is more accessible than ever.
What are force torque sensors?
A force torque sensor measures forces and torques across six degrees of freedom. Often referred to as a 6-axis force torque sensor, it detects:
- Fx, Fy, Fz – Linear forces along the X, Y, and Z axes
- Tx, Ty, Tz – Rotational forces (torques) around those axes
In simple terms, it enables multi-axis force measurement. When integrated into a robotic system, typically at the wrist or end-of-arm tooling, it gives the robot real-time feedback about how it’s interacting with its environment.
That feedback is the foundation of advanced force control, allowing robots to adjust motion dynamically based on what they “feel,” not just what they’re programmed to do.
What’s new in force torque sensor technology?
Force torque sensors have been around for years. But the latest generation is pushing performance further.
At Automate, ATI Industrial Automation showcased its next-generation platform featuring:
- New EtherCAT Ethernet control interfaces
- Advanced capabilities, including inertial measurement data
- Improved data processing at the edge
These upgrades expand what’s possible in real-world applications. For example, inertial measurement enables weigh-in-motion, allowing robots to measure and react to dynamic forces while moving, and not just in static positions.
The result: faster picks, improved part identification, and higher ROI for warehouse and industrial automation.
Integrated software included with modern systems also simplifies setup, calibration, and data interpretation, making it easier for manufacturers and integrators to deploy advanced sensing without specialized expertise. See how force sensing, combined with AI and edge computing, is expanding what robots can do in unstructured applications at ati.novanta.com.
You can see the technology in action in this spotlight demo from Automate.
Why force and torque sensing matter
Adding a force torque sensor transforms how robots operate. Instead of following rigid, pre-programmed paths, robots can:
- Identify parts based on resistance or contact feedback
- Perform continuous measurement during assembly or inspection
- Increase throughput with more picks per minute
- Adapt to variation without constant programming
This shift from position control to force control is a major step toward more autonomous systems. Robots equipped with multi-axis force sensing can detect misalignment, confirm insertion, or adjust grip strength automatically, which ultimately helps reduce scrap, downtime, and rework.
Key applications for 6-axis force torque sensors
Force torque sensors are now critical components across a wide range of industries:
Surgical Robotics
Precision and safety are paramount. Real-time force feedback helps ensure delicate procedures are performed accurately and consistently.
Humanoids and Advanced Robotics
As robots interact more directly with people and unstructured environments, force and torque sensing enable safer, more natural movement.
Warehouse Automation
High-speed picking, sorting, and packaging operations benefit from adaptive gripping and dynamic load measurement.
Industrial Applications
From assembly and polishing to machine tending and testing, force torque sensors improve consistency, quality, and overall system intelligence.
Choosing the right force torque sensor
When selecting a force torque sensor, consider:
- Required force range (Fx, Fy, Fz)
- Required torque range (Tx, Ty, Tz)
- Sensor weight and diameter (especially for collaborative robots)
- Overall height and integration constraints
- Compatibility with control interfaces like EtherCAT
- Availability of software included for calibration and data analysis
Matching the sensor’s capacity and form factor to your application ensures accurate measurement without sacrificing performance or payload.
Looking ahead
Force torque sensors aren’t new, but their role in automation is evolving. With advances in AI, edge computing, and high-speed networking, robots can process force and torque data faster and more intelligently than ever before. What was once limited to specialized research environments is now increasingly viable for mainstream manufacturing and logistics.
As automation systems grow more adaptive, collaborative, and autonomous, the force torque sensor will continue to play a central role. It takes the machines’ ability beyond movement to truly understand the forces at play.
Want to see the latest innovations up close? Explore more technology spotlights and live demos at Automate.
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