Can Collaborative Robots Safely Work Alongside Humans Without Physical Safety Cages?

All answers to this question.

According to ISO 15066, cobots are designed with power and force limiting (PFL) features that monitor the torque in every joint. While they can detect collisions, the "safety" depends entirely on the speed and the end-effector. If you put a sharp tool on a cobot, it still needs a cage. For small parts picking with soft grippers, the risk is minimal. You must perform a thorough risk assessment to determine the "clamping" and "transient" impact forces. Most modern sensors can detect a change in resistance within milliseconds, which is much faster than a human reflex, effectively preventing serious injury in standard assembly tasks.

   Answered 2025-08-14 by Deborah Miller

Have you considered using 3D laser scanners to create virtual "slow-down zones" around the robot instead of just relying on the internal force sensors?

   Answered 2025-08-16 by Steven Wright

• Steven, that’s a smart integration. Using area scanners allows the robot to maintain full production speed when no one is around and only drop to safety-rated speeds when a human enters the proximity. This hybrid approach actually solves the productivity lag that occurs when you rely purely on force-sensing stops. It keeps the workflow fluid without the footprint of a bulky metal cage, which is exactly what small shop floors need today.

     Commented 2025-08-18 by Brandon Scott

In my experience, the biggest hurdle isn't the tech; it's getting your insurance provider and OSHA to sign off on the cageless layout.

   Answered 2025-08-20 by Cynthia Adams

• I agree with Cynthia. Even if the robot is technically safe, the documentation required to prove it to a regulatory body is a massive project in itself.

     Commented 2025-08-21 by Gregory Harrison