What it detects
Ferrous and non-ferrous tramp within the ore profile: bucket teeth, skirt plates, drill rods, scrap steel left after shutdowns, tools and scaffold tubing. Proven on iron ore, coal, lithium, manganese, aggregates and coke, including highly conductive and magnetically permeable ores that swamp conventional detectors.
System components
- TMD frame and coils. Engineered adjustable frame in non-conductive, impact-resistant PVC, hot-moulded and FEA-tested for cyclonic conditions. Transmitter coil above the carry strand, receiver coil below; coils CNC-routed into PVC plates and sealed in epoxy, with a 35° contoured receiver to focus the secondary field.
- Controller. Mother board with Ethernet, power board and display board in an IP66 thermoplastic enclosure inside a stainless steel B&R cabinet. NORMAL, ALARM and BYPASS LEDs and a bar graph visible from outside; exterior weatherproof RESET button.
- 10.1″ touch screen. Sunlight-readable operator interface with Run, Setup, Options, Calibration, Service and View menus and three password levels (User, Administration, Service Technician).
- Balance actuator. 24 VDC, 3000 N linear actuator that tilts the transmitter coil for coil balance from the screen.
Options
- Flag Drop Marker. Timed output drops a flag on the belt at the detection point, coordinated with belt speed, so the tramp is found quickly.
- Speed sensor. For variable-speed belts; accurate coast distance and marker/clip timing (input to 2.5 kHz).
- Clip detector. Momentarily reduces sensitivity as belt repair clips or mechanical joins pass.
- Sounder / beacon. Audible and visual alarm at the detector.
- Automated calibration arm. Passes a test piece through the aperture on demand.
- Diverter gate mode. For sites where a gate or tramp magnet removes the metal and the belt keeps running: detection operates the output for the gate cycle and re-arms automatically.
Plant integration
Modbus TCP over Ethernet (port 502) or Modbus RTU on RS485. A contiguous 71-word integration block with alarm status bits, trip and coast counts, live signal and a communications watchdog is provided for PLC/SCADA. Alarm, bypass and remote-reset can also be hard-wired to the plant.
Installation
- Frame suits 700–3000 mm belt widths; height adjustable 1060–1560 mm; belt must track true through the aperture.
- No idlers, moving parts or vibrating structure inside the exclusion zone around the coils (distances on the installation drawings).
- Coil wiring in a separate conduit from power wiring; controller supply 90–264 VAC.
- Customer terminals for alarm relays, marker output, remote reset, bypass and speed sensor per the field wiring diagram.
Commissioning
Balance the coils, learn the idle baseline (static, running empty, running loaded), capture the test piece with Arm Metal, then let Auto Win scan transmitter power and detection-window combinations for the best signal-to-noise margin. Sensitivity is set last, and the self-correcting baseline holds the calibration through thermal drift and long belt stops. Veytech can commission on site or support your electricians remotely.
Common questions
Will it trip on the belt splices? Magnetised steel-cord splices are the most common cause of false trips. The detector's learned baseline and clip handling manage most cases; where splice flux is high, FluxRite mkII removes it at the source.
What is the smallest piece it will detect? That depends on coil separation, belt speed, burden and ore. Detection is verified on site with an approved test piece at operating belt speed. Talk to us about your target size.
Can it run on a variable-speed conveyor? Yes, with the speed-sensor option; marker and coast calculations follow the measured speed.
What happens if the controller overheats? Over-temperature protection raises a warning at 85 °C and a critical alarm at 95 °C that inhibits outputs until the unit cools.
