CS8C © Stäubli 2009 – D28070504A
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Chapter 3 - Safety
3.2. SAFETY DIRECTIVES CONCERNING TO THE WORK ENVIRONMENT
3.2.1. ANALYSIS OF SAFETY AROUND THE ROBOT CELL
Safety must be taken into account for the robot cell from the design and development stage on.
Before planning the installation of the robot cell, it is necessary to study the following points:
• Plan the safety strategies that reduce risks to an acceptable level.
• Define the tasks required for the foreseeable applications and assess the access and/or approach requirements.
• Identify the sources of risks including the failures and the failure modes associated with each of the tasks. The
risks can involve:
• the cell itself
• its association with other items of equipment
• the interactions between persons and the cell.
• Assess and estimate the risks stemming from cell operation:
• programming risks
• operating risks
• risks during use
• maintenance risks for the robot cell.
• Select the protective methods:
• use of protective devices
• installation of signalling means
• compliance with safe working procedures.
These points are taken from the standards applicable to robots.
Note:
This list is not exhaustive. Above all, it is necessary to comply with the standards in force in your
country.
3.2.2. RULES CONCERNING THE ROBOT'S WORK AREA
The controlled area or isolation area in which the robot moves must be determined using protective devices
(protective elements).
Note:
Protective elements are devices protecting persons from a dangerous area. See the standards
currently in force concerning safety for industrial handling equipment.
DANGER:
To ensure reliability and precision in the robot's movements, the robot cell
environment must comply with the levels of disturbance set out in the safety
standards.
DANGER:
At the time of an emergency stop, the final position of the arm can never be determined
precisely because of the kinetic energy involved. It is thus necessary to make sure that
no persons or obstructions are present in the robot's work area when the arm is
powered up.
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