Metal detector (DDMC)

In brief

• The frame metal detector (DDMC) uses transmitter and receiver coils that create a uniform electromagnetic field.

• It is used in the mining, recycling and wood sectors, for example to detect nails in wood before processing.

• It triggers an alarm or a reject system when a metal disturbs the field, and adapts to existing lines and conveyors.

• Fields of application

• Operating principles

• Operating recommendations

• General characteristics

• Case studies

Fields of application

The frame metal detector is used in various industrial sectors, including:

• Mining: to detect metals in extracted ores.
• Recycling: to identify and sort metals in waste streams
• Wood: to detect nails or other metal objects in wood before processing

Operating principles

The frame metal detector operates according to the following principle:

• The frame consists of transmitter and receiver coils that create a uniform electromagnetic field.
• When a metal object passes through this field, it disturbs the electromagnetic balance.
• This disturbance is detected by the receiver coils.
• An electronic signal is generated, proportional to the size and type of metal detected.
• The processing system analyses this signal and triggers an alarm or a reject system if a metal is detected

Operating recommendations

To optimise the effectiveness of a frame metal detector, we recommend the following:

• Regular calibration: carry out daily sensitivity tests to ensure detection accuracy. Adjust the sensitivity if necessary.
• Environmental control: minimise external electromagnetic interference by isolating the detector from other electrical equipment.
• Staff training: make sure operators fully understand how the detector works and its maintenance procedures.
• Product throughput speed: adjust the speed at which products pass through to optimise detection without compromising productivity.
• Preventive maintenance: clean the frame regularly and check the integrity of the electronic components.

General characteristics

The frame metal detector has several distinctive characteristics, depending on the sensitivity of the associated electronics:

• High precision: effectively detects unwanted metals for optimum product purity.
• Industrial protection: ideal for protecting equipment by preventing damage caused by metal contaminants.
• Installation flexibility: adapts easily to existing production lines and to various types of conveyors.
• Reliability: operates continuously with automated alerts

Advantages

• Proven performance
• High reliability
• Modular

Services

• Assistance with industrial commissioning
• Spare part stock
• Rapid after-sales service response
• Installed base monitoring and periodic performance checks

Frequently asked questions

How does the DDMC frame metal detector work?

The frame consists of transmitter and receiver coils that create a uniform electromagnetic field. A metal object passing through disturbs this field, generating a signal proportional to the size and type of metal, which then triggers an alarm or a reject system.

In which sectors is the DDMC detector used?

It is used in the mining, recycling and wood sectors. For example, it detects metals in ores, identifies metals in waste streams and locates nails in wood before processing.

How often should the DDMC detector be calibrated?

Daily sensitivity tests are recommended to ensure detection accuracy, with the sensitivity adjusted if necessary. The product throughput speed should also be set without compromising productivity.

How should the DDMC detector be maintained and installed?

The frame should be cleaned regularly and the integrity of the electronic components checked. External electromagnetic interference should also be limited by isolating the detector from other electrical equipment.

Can the DDMC detector be fitted to an existing line?

Yes, it adapts easily to existing production lines and to various types of conveyors. It operates continuously with automated alerts, and its sensitivity depends on the associated electronics.

Technical data

Type	Belt width (mm)	Dimension L (mm)	Dimension E (mm)	Weight (kg)
DDMC 300	300	592	620	85
DDMC 400	400	692	720	90
DDMC 500	500	792	820	95
DDMC 650	650	942	970	105
DDMC 800	800	1092	1120	110
DDMC 1000	1000	1292	1320	120
DDMC 1200	1200	1492	1520	130
DDMC 1400	1400	1692	1720	140

Variant DDMP (flat detector)

Type	Belt width (mm)	D (mm)	F (mm)	L (mm)	Weight (kg)
DDMP 500	500	240	640	910	85
DDMP 650	650	240	790	1060	90
DDMP 800	800	240	940	1210	95
DDMP 1000	1000	240	1140	1410	105
DDMP 1200	1200	290	1340	1660	110