Robot maintenance records: what to request with a refurbished industrial robot

Request robot maintenance records covering scheduled servicing, lubrication, repairs, component replacements, axis referencing, controller changes, and final testing. Each document should identify the robot and show when the work occurred, who performed it, and what was checked afterward. Ask for the refurbishment report separately from the previous owner’s service history.

These documents help you assess what the supplier actually inspected and repaired. They also reveal unanswered questions that may affect acceptance, installation, or your first maintenance visit. A clean exterior and a short demonstration cannot explain whether a reported gearbox replacement included the required follow-up checks or whether recurring faults remain unresolved.

The most useful approach is to compare the paperwork with the supplied equipment and the manufacturer’s instructions for its exact configuration. This article explains which records to request, what details make them useful, and how to handle missing information. Treat documentation as evidence to review alongside a competent inspection and an agreed acceptance test, rather than as a guarantee of future reliability or suitability for your application.

1. Match robot maintenance records to the equipment

Confirm the arm and controller identity.

Start by matching robot maintenance records to model designations, serial numbers, controller type, and equipment identification photographs. Check that service reports refer to the supplied arm and controller, especially when refurbishment involved combining equipment from different sources.

Internal asset numbers can help trace earlier records, but request an explanation linking them to the manufacturer’s serial numbers. Identify any controller exchange explicitly so its service history does not become confused with the arm’s history.

Record the previous application and environment when reliable information exists. Note unknown periods rather than assuming that an incomplete file describes the robot’s entire working life.

2. Review scheduled servicing and lubrication

Check dates, materials, and affected axes.

Request dated robot maintenance records showing the task, affected component, technician or service company, and findings. Compare completed work with the applicable manufacturer maintenance schedule; avoid applying another model’s intervals.

Lubrication entries should identify the axis or gearbox, lubricant designation, and whether the work involved inspection, replenishment, or replacement. A note saying “greased robot” leaves those distinctions unresolved.

Ask which scheduled tasks remain due at delivery. If a service date or lubricant cannot be confirmed, have a qualified service provider determine the appropriate next action from the model-specific instructions.

3. Trace repairs and component replacements

Separate replacement from inspection.

Request repair reports stating the original symptom, diagnosis, work performed, and subsequent checks. For replaced parts, ask for part numbers and whether the installed component was new, repaired, or previously used.

“Gearboxes checked” does not mean gearboxes were replaced. Likewise, an invoice for a motor does not establish which axis received it. Match invoices, workshop reports, and the refurbishment summary wherever possible.

For gearbox work, request measurement methods and the criteria used to judge results. The article on evaluating gearbox backlash in a refurbished robot explains why test conditions matter.

4. Request collision and axis-reference records

Identify checks following mechanical work

Ask whether known collisions, overload incidents, or structural repairs were recorded. Request the affected areas, inspection findings, corrective work, and evidence supporting release after the incident. An unavailable history does not establish that no collision occurred.

Mastering establishes axis reference positions using the manufacturer’s procedure. Request the date, reason, method, and affected axes whenever this work was performed. Determine whether the completed repair required additional verification under the relevant instructions.

Keep axis-reference records separate from application calibration. A tool or work-frame adjustment describes a different task and should not be treated as evidence that mechanical repairs were assessed correctly.

5. Check controller history and operating-hour evidence

Record the delivered software configuration.

Request controller repair details, recorded battery replacements, software versions, installed options, and a dated backup of the delivered configuration. Ask what the backup includes and what additional files or licenses are needed for recovery.

Obtain available alarm reports with explanations of recurring faults and their corrective actions. An empty current alarm list cannot establish that the equipment has never experienced faults.

For hour readings, request the counter name, capture date, and available information about resets or controller replacement. The guide to interpreting robot operating hours explains their limits as condition evidence.

6. Obtain refurbishment and acceptance reports

Ask for a signed report separating inspected, repaired, replaced, and untested items. It should identify outstanding defects and exclusions. This makes the refurbishment scope reviewable before delivery.

Test reports should state the setup, load where relevant, procedures, results, and acceptance criteria. Use the refurbished robot acceptance test guide to connect documentation requests with equipment checks.

Request records of relevant safety-function checks and identify their scope. OSHA’s industrial robot safety guidance addresses maintenance hazards and application risk assessment; workshop checks cannot replace evaluation of your integrated cell.

7. Eight documents to request before purchase

Use this checklist to agree on the documentation package before approving the order:

• Identification sheet linking arm and controller serial numbers to service files.
• Scheduled-service log with dates, tasks, findings, and responsible service providers.
• Lubrication records identifying components, lubricant designations, and work completed.
• Repair history showing symptoms, diagnoses, corrective actions, and follow-up results.
• Replacement-parts register with part numbers, installation dates, and component condition.
• Available incident reports and records of mastering or calibration work.
• Controller configuration record, dated backup, and available hour-counter evidence.
• Refurbishment scope, acceptance results, unresolved issues, and next service requirements.

8. Resolve gaps before agreeing on delivery

Missing robot maintenance records create uncertainty, but the response depends on what is absent. Ask the supplier to distinguish unavailable historical documents from checks it can perform and document now. New inspections cannot reconstruct an unknown history.

Put agreed inspections, corrective work, supplied documents, and acceptance conditions in writing. To discuss documentation and evaluation requirements for a proposed application, contact Robotic Hi-Tech Solutions with the equipment details.

FAQ

Must every service entry come from the manufacturer?

No. Evaluate the service provider’s competence, traceability, procedures, and recorded results rather than the letterhead alone.

Are invoices sufficient maintenance evidence?

They can support a report but often omit findings, installation details, and verification. Request the associated work records.

Can a recent inspection replace missing history?

It can document current findings within its scope. It cannot establish how the robot was maintained previously.

Should the seller provide the original owner’s name?

It may be withheld for confidentiality. Request anonymized technical records that still identify the equipment and work.

Does refurbishment restart every maintenance interval?

Do not assume so. Establish future servicing from documented completed tasks and the manufacturer’s applicable schedule.

Should I request photographs of replaced parts?

They can support identification and reported findings, but do not replace part details, repair reports, or test results.

What if records contradict the supplied equipment?

Request a corrected explanation and traceable supporting evidence before accepting the documentation package.

How should I retain the handover documents?

Store robot maintenance records under the equipment identity, preserve original files, and add future service entries without overwriting earlier records.