How to Build LOTO and Minor Servicing Procedures for Robotics

Frequently Asked Questions

When should a robotics task use full lockout/tagout instead of minor servicing?

Use full lockout when the task exposes employees to hazardous motion or stored energy, such as work inside the cell, bypassing guards, or troubleshooting with multiple uncontrolled hazards. Minor servicing may apply only to defined production tasks that are routine, repetitive, integral to production, and protected by effective alternative measures.

Does lockout/tagout for robotics cover just the robot arm?

No. The procedure should cover the full robotic cell, including connected equipment, access points, and all energy sources that could create hazardous motion or stored energy.

What should a minor servicing procedure for a robotic cell include?

It should state the exact tasks allowed, the required operating mode, the safeguards or alternative protective measures, body-position and access limits, who is authorized, and when the task must stop and switch to full lockout/tagout. The post stresses that these procedures need to be task-specific and usable in the real work environment.

What protective measures can be used for minor servicing on robotics?

The post lists measures such as interlocked barriers or gates, presence-sensing devices where appropriate, enabling devices, hold-to-run controls, reduced-speed or manual modes, and clearly defined safe positions and restricted access zones. Whatever measures are used, they must provide effective protection for the specific task.

How often should robotic LOTO and minor servicing procedures be reviewed or updated?

Review them whenever equipment, programming, processes, or tasks change in a way that affects employee exposure. The post also recommends validating procedures in the field and checking near misses, access events, recurring jams, and whether actual practice still matches the written procedure.