What Has To Be Marked On The Machine, And In What Language
2026/11/05
What Has to Be Marked on the Machine, and in What Language
The data plate is the smallest item in a purchase and the first thing anyone reads when something goes wrong. It is also the part of a machine that is most often made slightly wrong, because it is produced at the end of the build, by whoever has the engraver.
This article sets out what belongs on the plate, what belongs on the labels around it, and why the language question is bigger than a translation.
The head of a platform welder: a crush-hazard label beside the electrodes, cooling hoses with their own printed specification, and the control panel below. Each of these communicates something without the manual.
The Plate Itself
A machine data plate normally carries the manufacturer and a contact address, the model or type designation, the serial number, the year of manufacture, and the electrical ratings the machine was built for: voltage, number of phases, frequency, power or kVA, and the duty it is rated at. Mass is useful too, because somebody has to lift it.
Two details matter more than they look. The year of manufacture is what a spare parts desk uses to find the right drawing version, so it should be the year of build and not the year of order. And the ratings have to describe the machine as built, not as quoted: a plate that says 400 V on a machine configured for 480 V is a fault that will be found by an electrician with a meter.
Placement Is Part of the Requirement
A plate belongs where a person can read it without opening a panel or climbing: on the frame at eye level from the operating position, or on the cabinet door if that is what the operator faces. A plate inside the electrical cabinet is compliant on paper and useless in practice, and an inspector who has to fetch a screwdriver has already formed an opinion about the rest of the machine.
Labels Around the Plate
The plate identifies the machine. The labels around it keep people alive: the crush hazard at the electrodes, the hot surface at the transformer, stored energy in the capacitors of a stored-energy machine, and on a laser machine the class marking and the aperture label that tells you where the beam leaves.
These are not decoration and they are not a substitute for guarding. Their job is to survive: printed on a durable substrate, fixed where they can be read from the operating position, and not painted over during a refurbishment. A label that has been painted over is worse than no label, because it says the machine was maintained and the maintenance missed it.
What Belongs in the Manual, Not on the Plate
There is a temptation to put everything on the plate and call the job done. It does not work, partly because the plate is small, and mostly because different readers need different things. The plate is for the person identifying the machine: model, serial, year, ratings. The manual is for the person operating and maintaining it: the schedule, the adjustment points, the lockout procedure, the fault codes.
The labels sit between the two. They exist for the moment when nobody is holding the manual: the electrode that will crush a hand, the surface that will burn, the valve that will release hot water. A label that only repeats what the manual already says, and does not mark a hazard, is decoration.
Language Is Not a Translation Task
The instructions have to be in a language the operator can read, and the language of the labels has to match. A machine whose manual is in English and whose internal labels are in Chinese is half documented: the operator can read the procedure and cannot read the valve.
We have this conversation on almost every export order now, and the honest version is that it starts at the manifold rather than at the manual. Whoever engraves the water circuit is deciding, months before the manual is printed, whether the machine will be usable by someone who does not read Chinese.
The water manifold on one of our machines, engraved in Chinese. Labels like these are why language comes up in any discussion about marking: an operator who cannot read them opens the wrong valve.
Serial and Year, for the Next Ten Years
The serial is the only thing on the machine that ties it to a file. Everything else can be reconstructed from a photograph; the serial cannot. It should be on the plate, on the frame, and in the documents, and the three should agree.
The year matters for a second reason beyond spare parts. Rules change, and a machine is assessed against the rules in force when it was placed on the market. Without a documented year, a machine sold into a market five years ago has no defensible position about which edition applied to it.
Packing Marks Are Part of the Same Job
A crate carries its own markings: the shipping marks that identify the consignment, the handling symbols, the country of origin where the rules ask for it, and the weight and dimensions in the units the destination actually uses. These are read by people who will never open the manual, and a crate marked in a language the warehouse cannot read is a crate that gets put in the wrong bay.
What to Check on Arrival
Five minutes with the machine before it goes into service catches nearly everything that goes wrong with marking.
· Plate present, legible, and fixed with fasteners rather than adhesive.
· Serial on the plate matches the serial on the packing list and the manual.
· Electrical ratings match the site supply, not just the order confirmation.
· Hazard labels present at the electrodes, the transformer and any stored-energy part.
· Manual and labels in the language your operators actually read.
Each of these is cheap to fix on arrival and expensive to fix after commissioning, because after commissioning the machine is in the way of production and nobody wants to take it out of the line to have a plate remade.
Requirements vary by destination market. Always confirm against the current edition of the applicable standard and with your certification body.
PDKJ continues to provide customized laser welding and resistance welding solutions based on different materials, workpiece structures, welding requirements, and production applications.
Related Products
· Medium Frequency Inverter Seamless Spot Welding Machine
Machines on the assembly floor in Dongguan, each carrying its own plate before it is packed.
Contact PDKJ
Send us your part drawing or a sample, and our engineers will run a welding feasibility trial on your own material and recommend the equipment configured for your application.
WhatsApp: +86 136 1279 3248
Email: jay@gd-pw.com
Website: https://www.spotlaserwelding.com/contactus.html
Address: 1-2F, Building 3, Qichen Industrial Park, No. 26 Luxi 1st Road, Liaobu Town, Dongguan City, Guangdong Province, China
