Selling a coordinate measuring machine with useful evidence

Renishaw's CMM hardware overview distinguishes probe systems, controllers, interfaces, heads, racks and accessories. That is a useful way to organise the inventory. Similar-looking components should not be treated as interchangeable without supporting documentation.

Record the base machine's model, serial number and documented measuring envelope. Then identify the actual controller and sensing arrangement, including relevant probe heads, modules, styli, racks and qualification artefacts. List the supplied computer and peripheral equipment separately.

A photograph of several probe boxes does not establish that every item belongs to the installed configuration. Retain part numbers and available compatibility records, and flag anything unidentified.

Hardware

• Base machine identity and specification for the actual configuration.
• Controller, interface and hand-control identification.
• Probe system and each included accessory.
• Computer, peripheral equipment and any dedicated support equipment.
• Known faults, missing items and service history.

Software and data

• Software product, version and licence evidence.
• Confirmation of what rights can transfer.
• Relevant machine files and backup arrangements, as identified by the specialist.
• Agreed treatment of customer programs and inspection data.

Measurement evidence

• Calibration or verification report linked to the correct serial number.
• Date, scope, conditions and any qualifications in the report.
• Subsequent repairs, moves or changes to the system.
• Available records for associated measuring accessories.

Relocation

• A specialist's assessment of the move and destination requirements.
• Responsibilities for preparation, packing, transport and installation.
• The agreed assessment or calibration after relocation.
• Exclusions and assumptions in the contractor's quotation.

Do not collapse these four parts into a single phrase such as “calibrated and ready to use”. Each part can have a different evidence status.

Match the report to the machine. Read its scope and qualifications, rather than relying on a sticker or the date on the front page.

UKAS's metrology accreditation information explains the role of accredited calibration and measurement services. It does not establish the condition of the particular CMM being sold. If accreditation is relevant to a report, verify the provider and the applicable scope rather than assuming every service it offers is accredited.

A calibration record is dated evidence. It should be considered alongside any later repairs, adjustments or relocation. Ask a metrology specialist to explain how those events affect the proposed sale statement.

The torque-wrench calibration guide covers another type of calibration evidence that may be present in the same department. The optical-comparator guide deals with another inspection asset whose accessories and reports also need individual identification.

Hexagon's CMM relocation service information describes the specialist attention involved and includes setup and calibration at the destination. The practical lesson for the seller is to obtain a machine-specific plan, not to assume ordinary machinery transport settles the measurement questions.

Provide safe-access photographs, location details and the machine record to the specialist. Leave bracketing, dismantling and handling methods to competent people. The specialist briefing guide helps define the questions and expected report.

Resolve the software and backup handover before committing to the package. A computer included in the lot does not itself establish transferable software rights.

Send the completed four-part checklist to UK Auction Group for a valuation discussion. A buyer can then see the system being offered, the evidence behind it and the work still needed after a move.

The engineering and CNC hub connects the remaining preparation guides.