Evidence-led engineering
Cobot risk assessment and safety validation.
PUWER-focused guarding reviews, safeguarding concept development and functional validation for collaborative robot applications, integrated cells and retrofit safety upgrades.
Direct answer
Does a cobot need a risk assessment?
The end effector, workpiece, fixture, operating speed, neighbouring machinery and human tasks can introduce hazards that do not exist on the robot arm alone. A defensible safeguarding concept is based on the intended use and foreseeable misuse of the complete application.
Start with boundaries and evidence.
The precise deliverable is agreed before work begins. A guarding survey, design risk assessment, PUWER review and final validation are related but not interchangeable outputs.
Intended use
Product, process, robot programme, payload, target rate, modes, users and expected lifecycle.
Hazard identification
Crushing, trapping, impact, cutting, heat, ejection, electrical, process and access-related hazards.
Task analysis
Loading, teaching, changeover, cleaning, recovery, maintenance and foreseeable intervention.
Risk reduction
Inherently safer design, guarding, protective devices, control functions and information for use.
Safety requirements
Clear definition of inputs, logic, outputs, safe state, reset, fault response and performance need.
Verification & validation
Inspection, calculation evidence, functional tests, results, limitations and agreed handover record.
Use the current requirements for the actual project.
The applicable legislation, designated standards, editions and conformity route should be confirmed at project start. Standards support—not replace—the machine-specific risk assessment.
Test against defined safety requirements.
Validation should show that the implemented measures perform as specified in the actual application and operating modes.
Plan
Agree functions, evidence, test methods, responsibilities and boundaries.
Inspect
Confirm hardware, installation, identifiers, distances and wiring evidence.
Test
Actuate devices and check stop, reset, restart, modes and fault response.
Record
Capture results, evidence, deviations, limitations and required actions.
Handover
Provide the agreed project documentation and outstanding-action status.
Define the evidence before the test.
No. The robot declaration relates to the robot product and its defined scope. Integration with tooling, fixtures, payloads, conveyors, machines and people creates a robot application that must be assessed as a complete system.
A survey can review the robot and tool, movement envelope, payload, operating modes, access tasks, existing guards and devices, nearby equipment, control interfaces, stopping considerations, floor space and installation constraints.
The agreed validation scope may include inspection, device actuation tests, stop and reset behaviour, prevention of unexpected restart, fault response, control-system evidence and a record of results. The exact test plan depends on project responsibility and boundaries.
Oxford Machine Guarding can provide guarding-focused surveys and project reviews. The proposal should state whether the output is a specific safeguarding design input, a defined PUWER assessment or another agreed engineering deliverable.
Start with the application
Share the robot, tool, task and access requirement.
Send photographs, a layout or a short description. We will help define the survey, guarding concept and safety-integration scope.
