Robotics Safety

What is the three-step method for risk reduction described in this course?

The three-step method prioritizes hazard controls in this order: first, inherently safe design measures (like elimination or substitution); second, safeguarding and complementary protective measures (such as physical barriers and sensors); third, information for use (including warnings, administrative controls, and PPE).

What is the difference between collaborative and non-collaborative robots?

Collaborative robots are designed for direct interaction with workers, while non-collaborative robots do not require or allow direct interaction. This course focuses primarily on non-collaborative robots, which require more extensive safeguarding such as physical barriers, interlocking devices, and presence-sensing systems to protect workers.

What are the most common hazards associated with industrial robots?

Common hazards include mechanical injuries (crushing, shearing, cutting, impact, and projectile injuries), pressure hazards from failed hydraulic or pneumatic lines, electrical hazards (shock, arc flash, fire), thermal hazards (extreme heat or cold), and slip, trip, and fall hazards from cables, hoses, or spills around the work cell.

Why are physical barriers and sensors important for robot safety?

Physical barriers create a permanent separation between humans and robots, preventing access to hazardous areas. Sensors such as light curtains, pressure mats, and laser scanners complement barriers by controlling access, keeping barrier entries locked until the robot reaches a safe state or automatically stopping motion when someone enters the work cell.