A demonstration factory is usually the first place where a new production concept is shown to customers, investors, auditors and internal operators at the same time. That is exactly why its safety review is harder than a review of one machine. The equipment in a Industry 4.0 demonstration factory rarely arrives as a single unit. It arrives as a line: feeding, handling, process stations, vision and sensor checks, control panels, guarding, a human operator and, in many of our projects, a cleaning or washing step that uses heat, pressure or chemicals. A manufacturer that reviews only the nameplates of the individual devices will pass a shopping list and still miss the interaction risks.
If your line needs that kind of engineering support before hardware is ordered, our manufacturing automation work starts from process analysis, and if the process itself needs a purpose-built machine rather than a catalogue model, non-standard automation equipment is designed around the part, the cycle time and the space you actually have.
Start with what the line is allowed to do without an operator
Before any standard is quoted, write down the permitted human interactions. In a demonstration line, an operator loads and unloads parts, an engineer stops a station to adjust a fixture, and a visitor may stand close to the conveyor while the line runs. Each of those situations changes what the safety concept must cover. Three questions decide most of the design:
- Can a person reach a moving or hot part during normal operation, or only after the machine is stopped?
- When a guard door opens, does the hazard need to be removed (power cut, pressure vented, temperature falling) or only monitored?
- Who is allowed to bypass or override a function for a demonstration, and how is that recorded?
The third question is the one most factories skip. A demo line gets stopped, jogged, manually fed and re-triggered far more often than a production line, because the goal is to show a sequence on demand. If no rule exists for manual mode, the safety review will not match what happens on the floor in practice.
Review the hazards station by station, then at the joints
Break the demonstration line into the same blocks you would put on a layout drawing: infeed and fixturing, transfer and handling, the process station itself, inspection and test, any cleaning or chemical step, and the outfeed. For each block, record the energy present and the way a person can meet it.
- Mechanical: pinch and shear points at robots, grippers, presses, lift tables and conveyor transfer points; stored energy in raised tooling or springs.
- Electrical: control cabinets, motor feeds, battery packs on mobile equipment, and the isolation point for each station.
- Thermal: heated platens, ovens, steam and hot-water circuits, and hot discharged parts.
- Fluid and chemical: pump pressure, cleaning agents, mist, and what happens if a chemical tank is spilled during a changeover.
- Ergonomic and housekeeping: repeated manual loading, floor wetted by a cleaning step, and trip risk from cabling added for sensors and cameras.
The joints are where demonstration projects most often fail a review. A robot cell and a conveyor are each safe on paper; the transfer point between them is where hands go in. A station guarded by a light curtain is fine until the neighbouring cleaning module drips onto the walkway. If you integrate the line from several suppliers, decide at the design stage which supplier owns each interface, including the guarding at that interface, and put it in writing.
Match the standard to the market and to the machinery, not to the label on the machine
A manufacturer that sells into several regions needs to know which rules apply before parts are purchased, because the safety parts are not interchangeable: the stop category, the guarding interlock and the safety relay chosen in one project cannot simply be swapped for another market. Do not assume that a component sold as "CE marked" or "UL listed" settles the question for a whole line; a line is assessed as a machine, and the component certificate is only one input.
A practical approach that survives export is to design to the stricter requirement of the two markets you are targeting and then document the residual risks. Ask your customer for the target country, the acceptance body, and whether their site has its own internal machine-safety rules that are stricter than local law. Large electronics, automotive and display manufacturers commonly do, and those internal rules control the acceptance visit even when the national requirement is broader.
If you want the requirement list produced before the machine is built, that belongs in the design contract rather than in a chat. Our engineering services cover scheme design, electrical and control design, and on-site commissioning, so the safety concept and the machine drawing are produced by the same team instead of being handed between strangers.
Treat cleaning as a process step with its own risk list
Many demonstration lines now include an automated cleaning or degreasing station, because parts arriving coated with cutting fluid or grease damage bonding and inspection steps downstream. Cleaning brings its own hazards, and they are different from the mechanical ones above: high temperature, pressure, wet floors, and chemical handling. For automated cleaning workstations we build on the base of our PowerDe cleaning equipment range, and a fixed steam cleaning machine such as the HW02 shows the kind of data you should expect to see documented for any cleaning module that enters your line: 220 V working voltage, 6 kW heating power, steam temperature around 160 °C, vapor pressure of 0.8 MPa, an 80 L SUS304 tank, and protection functions covering leakage, short circuit, high temperature, high voltage and water shortage. Those parameters are not marketing numbers; they are the inputs to your scald, pressure, slip and electrical risk assessment.
- Confirm who can open a heated circuit and whether pressure is vented before the guard releases.
- Check drainage, floor slip resistance and whether wet zones are separated from electrical cabinets and visitor walkways.
- Verify that the water supply, power and any chemical dosing are switched off with the station, not left live overnight.
Prove it with tests and a document set, not with an opinion
A review is only finished when the safety functions have been exercised and recorded. Run the line through the failure cases you wrote down: open each guard while the station runs and measure what stops and how fast; trigger the emergency stop from every operator position and check that the restart cannot start the hazard unexpectedly; cut a sensor and confirm the line goes to a safe state instead of continuing; test the interlock on each chemical or heated module. Record the results with the machine serial number, the date, the person testing and the software or PLC version, because a later modification invalidates an unversioned record.
The document package you should be able to hand a customer at acceptance is short and concrete: a hazard list with the residual risks and how they are controlled; a risk-reduction matrix mapping each hazard to guarding, interlocks and safety functions; the electrical and PLC or HMI programs with revision numbers; the safety-related part specification for each stop function; the layout showing guarded zones, visitor walkways and wet zones; the operating and maintenance instructions including the manual-mode rule; the factory acceptance test report; and the training record for the operators who will run the demonstration. If your team does not have these documents as a normal output, integrated engineering team services can take the mechanical, electrical and control work as one scope so the documentation is not assembled after the fact from three sources.
A checklist to run before you switch the demonstration on
| Check | What to confirm | Evidence |
|---|---|---|
| Intended use and human interaction | Loading, unloading, adjustment and visitor paths are written down | Signed intended-use statement |
| Interface ownership | Every transfer point and shared guard has one named owner | Integration scope list in the contract |
| Stop functions | Guard interlocks, emergency stop positions and controlled restart behaviour | Witnessed test record with PLC version |
| Thermal, pressure and chemical modules | Venting, isolation, drainage, wet-zone separation, chemical storage | Module datasheets plus commissioning checklist |
| Manual and demonstration mode | Who may use it, what is limited, how speed is restricted | Operating instruction and access rule |
| Target market rules | Applicable requirements per country plus the customer's internal machine-safety rules | Written requirement list from the buyer |
| Change control | Re-test rule whenever guarding, layout or software changes | Revision log and re-test plan |
Send us the process flow, the part you handle, the cycle time you need and the country where the line will be accepted. From there the safety concept, the machine design and the acceptance documents can be planned together instead of being discovered during commissioning.
The parameter figures cited above are taken from the PowerDe HW02 fixed steam cleaning machine product page. When a cleaning module is integrated into your line, confirm the current specification with the manufacturer, because your own hazard assessment depends on it.
