Buying a Demo or Refurbished Robot: Usage History, Licenses, and Reconditioning Scope

A demo or refurbished robot can reduce the purchase price, but it is only the lower-cost choice after missing options, reconditioning work, support and integration costs are priced in. A listing may say "refurbished" and show a clean machine. Ask what the offered price includes: documented usage, replaced parts, software rights and measured performance for that specific unit.

"Maintained" and "performance verified" are different claims, and a refurbished robot can satisfy the first without the second. This article is about telling them apart. It covers the usage history, the reconditioning scope, the licensing, and the delivery test that separate a well-refurbished machine from a clean-looking one.

Identify the Unit Being Offered

The first step is to identify the unit precisely. That starts with the serial number. The serial number identifies the machine, and on that identity the buyer can build the rest of the evaluation: how old the unit is, which controller it carries, which robot model and variant it is, and what service has been recorded against it. If the listing omits the serial number, obtain it before accepting unit-specific condition or test claims. Match the arm, controller, identification plates and report references; a controller may have been replaced. Condition is specific to the offered configuration.

Review Usage and Event History

The serial number anchors the inquiry, but service and event records may be incomplete, unavailable or held by different parties. Ask the seller to disclose what logs and maintenance records actually exist and their coverage period.

A seller who can produce a service history with the serial number is a different proposition from one who cannot. The available history helps assess condition and price, while gaps remain part of the comparison. Was the robot run in a clean, light-duty application or in a harsh one, at high duty cycle, with frequent overloads. Was it ever crashed, and was the crash properly repaired and re-calibrated. Has it been in storage, and for how long.

Ask for operating hours, event logs and the maintenance and repair records that explain them. Record what each hour counter measures and which controller or component it belongs to. Hours indicate exposure, not remaining life, and an empty or partial event log does not prove that no collision occurred. None of this has to be disqualifying; a hard-worked robot can be a good buy if the price reflects it. What matters is that the known history and the unresolved gaps are explicit. A buyer who cannot establish the usage history is pricing risk they cannot see, and the discount has to cover that uncertainty or the deal does not make sense.

Separate Reconditioning from Routine Maintenance

The phrase to watch is the one that sounds reassuring and promises nothing. Treat "maintained" as a claim about service work and "performance verified" as a claim that needs a test report. Name the tested properties, method, load, duration and pass criteria. A limited power-on or repeatability check cannot establish every original specification. Separate routine maintenance, repair and the stated reconditioning scope in the offer.

The label "reconditioned" does not itemize the work on this unit, so the buyer has to pin it down. Which parts were replaced, with what, and which parts were inspected but left in place. Which calibration was re-performed. Which software and firmware were updated. The distinction matters because wear is uneven. A robot can have clean paint, tight joints, and a controller that powers up perfectly, while its gears, belts, and bearings have accumulated hours that nothing in the photos reveals. Visual condition and remaining life are different questions, and appearance is not evidence of the second.

Demand the performance claim in writing, with the test behind it: named checks, load, duration and acceptance criteria. ABB's premium remanufactured robot program is a documented example. Its published process describes reconditioning to a like-new condition using the original specification and dimensions and OEM parts, an initial 152-point inspection before dismantling to preserve traceability, replacement of worn parts with OEM parts, cleaning before reassembly, and testing of every unit at the nominal payload for a defined minimum duration before painting and shipment. Use that specificity as a purchasing benchmark: what was checked, for how long and at what load. The exact tests must match the model, repair scope and intended task.

Ask for the replaced-parts list, the controller and firmware details, and the OEM-specified mastering, calibration or accuracy-verification records relevant to the work performed. A rebuilt or disassembled robot needs the checks prescribed for that model and repair scope before precision claims are accepted. Mainland regional documentation also makes scope important: KUKA Robotics China's upgrade and refurbishment page separates mechanical refurbishment, balancing-cylinder service and KSS software/PC upgrades, with the service scope agreed for the system. This is a China-region service description from the German OEM, not a record of work on the offered unit.

Verify Software and License Transfer

Verify software rights separately from possession of the hardware.

Robot controllers run firmware and system software, and some features require separately licensed options. Mainland OEM JAKA's official FAQ documents error 0x0F0058 when a function license is not detected and states that some functions need software authorization. That establishes an authorization requirement for those functions, not a used-unit transfer policy. A secondhand robot may arrive with firmware that is older than the current release, with options that were licensed to the original owner and are not transferable, or with the controller in a state that needs re-licensing before a feature the buyer assumed works will actually run. None of this is visible in a photo.

The practical step is to ask, before purchase, exactly what firmware and which licensed options are included, and whether the license transfer is permitted and how it is documented. Identify whether each entitlement is tied to the controller, robot, organization, account or separate dongle, and who can authorize its continued use after the sale. Obtain the applicable OEM terms and written unit-specific confirmation from the seller and, where needed, the manufacturer. Check access to backups, installation media and required accounts as well as the options list. A machine whose key features turn off without a paid re-license is not the bargain its price suggested.

Test the Offered Configuration Against the Intended Task

The last line of defense is the delivery test: what is measured, and whether the machine as offered can actually do the job it is being bought for.

Require a report identifying the tested configuration, properties, methods, loads, duration and pass criteria. Match any claim of restored nominal performance to the specifications actually measured. ABB publicly describes nominal-load testing for at least 16 hours under its own remanufacturing program, and that is a good example of a documented process rather than a universal test requirement or a promise from a third-party seller. A defined load-and-duration test provides evidence beyond a power-on check, but examine its measurements, failures, repairs and final pass results. Record the warranty and remedies separately from the test report.

The test should also be aimed at the intended task, not only at the nominal specification. A machine can pass a generic test and still be missing a capability the buyer's application needs: a reach or payload variant that is short, a controller generation that does not support an option the cell requires, a mounting or interface that does not match. So the buyer should map the offered configuration against the intended task and identify gaps that require a hardware or software change, additional integration or a different unit.

Compare the Whole Offer with a New Unit

The buyer should price the gap to new honestly.

Include the future spare-parts and firmware exposure described in our robot end-of-life planning guide when comparing a used unit with a current new model. A used unit that is missing a feature the new one has, or that carries an older controller, or that comes with a shorter support expectation, is not a straight discount. Compare the arm, controller, pendant, cables, options, tooling and support scope on both offers. Add quoted licensing, repair, integration, transport and commissioning costs, plus the cost exposure from unresolved items. A shorter or unavailable support commitment belongs in the comparison even when it cannot be reduced to a precise number. Sometimes the used unit still wins. Sometimes the gap closes and the new machine is the better buy, and it is much cheaper to discover that in a spreadsheet than after the install.

The deliverable here is a checklist the buyer can send to any used-robot seller, and it is also the comparison frame. Serial number and documented usage history. The reconditioning scope, with the replaced-parts list, calibration record, and firmware version. The licensed-options list and the license-transfer status. The delivery test: check count, test load, test duration, and pass criteria. The offered configuration against the intended task. And the total-cost comparison to a new unit, including any re-license.

Use the checklist to mark each item as documented, accepted with a stated condition, or unresolved. Accept the purchase on the unit-specific records, rights and agreed test results; if the missing capability or unpriced uncertainty outweighs the discount, choose the new unit or another offered configuration.

Evaluate the serial number, not the photograph. If you are weighing a demonstration unit or a refurbished industrial robot, share the offered model and controller, serial number if supplied, service and repair history, quoted software options, seller test report and intended application. We can help review that configuration against your task, identify missing model or interface information, and prepare the technical questions that the seller or OEM should answer. Ownership, license transfer, remaining support and the condition of the individual machine require direct documentary confirmation.