Start with what sits inside the splash zone
Before any hose is unrolled, stand at the floor drain and mark a circle around the washing area. Everything inside it needs attention: machining centers with their chip conveyors, the tool magazine of an adjacent cell, wall-mounted control cabinets, motor junction boxes, cable trays running at low height, and floor-level conduit outlets. A machine that is being washed and a machine that is merely nearby face different risks, so list them separately and assign a responsible operator to each.
The failure mode is rarely dramatic. Water finds a gasket that has hardened with age, a chip-conveyor cover that no longer seats flat, or a cabinet gland that was never tightened after the last maintenance visit. Corrosion and insulation faults then appear weeks later as axis alarms, an intermittent e-stop circuit or a drive that trips without an obvious cause, and the cleaning shift is long over before anyone connects the fault to it.
Close the machine before cleaning the room
For the machine under cleaning, the routine is straightforward: doors and guards closed, tool-changer covers in place, chip conveyors emptied and their covers seated, pendant heads hung up rather than left lying on the floor, and connectors checked by hand. Cables that run through a drag chain are a common weak point because the chain joints let spray travel along the cable jacket toward the connector at the far end.
For the machines standing next to the washing bay, the practical tool is a temporary barrier rather than the machine's own enclosure. Plastic sheeting weighted at the base, or purpose-made panels, keeps drift off way covers and cooling-unit intakes. Barriers need to reach the floor, because overspray from a hard floor surface travels sideways. Removing that sheeting before the floor has dried is what makes the exercise pointless, so build the drying time into the schedule.
Choose the method that limits how much water is loose
A cold-water jet with detergent puts a large volume of liquid on the floor and gives the operator little control over where it goes. It also leaves detergent film on the concrete, which stays slippery after the visible water is gone. A high-temperature steam machine for workshop use works differently: the same thermal energy lifts oil and cutting-fluid residue from the floor with a fraction of the water, so there is far less standing liquid to find its way into a floor drain that is blocked with swarf or into a cable duct crossing the bay.
Dry-steam mode is the setting that matters most next to equipment, because the low water load lets an operator work along the plinth of a machine, around a hydraulic power unit and up the edges of a painted floor marking without flooding anything. Where the floor carries thick, polymerised grease rather than fresh coolant, wet-steam or hot-water mode does the lifting first and the machine is switched back to the drier setting for the last metre next to the machine bases. That sequence, aggressive mode in the open floor and dry mode near components, is what keeps the risk low without slowing the job.
In a shop with a fixed washing bay, a fixed steam cleaning machine is usually placed near the bay with its supply line routed clear of the walking lane. Fixed units run on mains power, so the operator only manages the hose and wand; keeping that hose away from the machine's own work area also removes the trip hazard that causes more damage to guards and pendants than the cleaning process ever does.
Write the protection steps into the cleaning instruction
Ask the maintenance team for the shutdown points, the location of every cabinet and outlet in the bay, and which machines have enclosures they no longer trust. Put those answers on a one-page floor sketch and keep it at the washing bay. The instruction should state who closes each machine, which barriers go up, which mode is used at the machine plinths, how long the floor must dry, and which items must be inspected before power is restored.
- Mark the splash zone and list every electrical and mechanical item inside it.
- Close, cover and empty the machine being cleaned; screen the machines beside it.
- Lift heavy grease with hot-water or wet-steam mode in the open floor area only.
- Switch to dry-steam mode within roughly one metre of any machine base or cabinet.
- Let the floor and the barrier area dry before sheeting is removed and power is returned.
- Walk the bay afterwards and record anything that collected water, so the next clean starts from a better layout.
If your shop is planning a permanent washing bay, or the current one keeps producing faults in the machines standing next to it, tell us which machines sit inside the splash zone and what residue is on your floor. Our engineers match the machine, mode and supply arrangement to that layout rather than to a generic cleaning specification, and if the bay itself needs to change we can work through the integration with you.
