一、What is DPM Barcode Scanner & Working Principle
What is DPM Barcode ScannerDPM is the abbreviation of Direct Part Marking. A DPM barcode scanner is a professional industrial-grade imaging scanner specially developed to read permanent direct marks (laser etching, dot peen, chemical etching) directly engraved on the surface of metal, plastic, alloy and mechanical parts, instead of ordinary paper label barcodes.
Different from conventional 2D scanners, ordinary barcode readers cannot identify low-contrast, reflective, concave-convex, oily and tiny Data Matrix codes on workpieces. NETUM DPM scanners are built with exclusive industrial decoding algorithms, multi-angle adaptive light sources and high-resolution global shutter CMOS sensors, which are the core equipment for full-life cycle traceability in intelligent manufacturingNetum.
Working Principle
1. Special Light Source Illumination: Adopt white ring light, diffused red light and multi-spectrum complementary light to eliminate strong mirror reflection on metal surfaces, make up for insufficient contrast of shallow engraved codes, and optimize imaging environment for dot peen uneven marks.
2. High-Definition Image Acquisition: 1.3MP global shutter CMOS sensor captures clear images of DPM marks on irregular, curved and dirty surfaces in real timeNetum.
3. Low-Contrast Decoding Algorithm: Built-in advanced decoding engine quickly identifies damaged, smudged, ultra-small Data Matrix, Dot Code and other industrial DPM symbologies, even with minimal color difference on anode oxidized surfaces.
4. Stable Data Output: Transmit decoded data to MES, WMS, PLC and terminal devices through USB, wireless Bluetooth, 2.4G and serial ports to realize automatic production traceability.
Application Industries of DPM Scanner
DPM permanent direct marking is widely demanded in global manufacturing traceability management. NETUM DPM scanners cover mainstream industrial scenarios with stable decoding performance:
1. Automotive ManufacturingTraceability of engine parts, chassis components, transmission parts, fasteners and die-casting metal components with laser-etched DPM codes.
2. Aerospace & Military IndustryLifetime unique identification and quality tracking of precision aviation parts, alloy components and hard-to-replace components.
3. Electronics & SemiconductorReading micro DPM codes on PCB boards, chips, IC components, plastic housing and precision electronic accessories.
4. Medical Device ManufacturingHygienic traceability of surgical instruments, implant parts and medical hardware with permanent direct marks, meeting medical industry regulatory standards.
5. Hardware & Heavy MachineryDot peen marked parts of mechanical equipment, steel forgings, pipeline fittings, bearing internal components and rust-resistant industrial workpieces.
6. Precision Mold ProcessingFull-process management of mold parts, alloy fixtures and ultra-small engraved component identification.
How to Choose Suitable NETUM DPM Barcode Scanner
Combined with your workpiece marking process, working environment, operation mode and system docking requirements, we sort out the complete selection guide of NETUM industrial DPM scanners to help you select the most cost-effective model at one time:
1. Select by Part Marking Technology
· Laser Etching Metal Codes (Strong Reflection, Low Contrast)Recommend NETUM RD2023：Equipped with white ring light source, 1.3MP global shutter sensor, perfectly eliminate metal reflection, efficiently decode shallow laser engraved Data Matrix codes.
· Dot Peen & Oily Rough WorkpiecesRecommend NETUM NT-1202：Diffused light system, strong algorithm for concave-convex dirty codes, adaptive to oil pollution, dust and uneven dot marks on hardware partsNetum.
· Ultra-low Contrast, Anodized & Micro Tiny CodesRecommend NETUM GY-80U Ultra-rugged Wireless DPM Scanner：High dynamic imaging, infrared auxiliary light, extreme low contrast decoding, IP67 ultra-rugged industrial protectionNetum.
2. Select by Operation Mode
· Manual Handheld On-site Inspection (Workshop, Incoming Inspection)Choose wired/wireless handheld DPM scanners (RD2023, NT-1202), ergonomic grip, IP65+ dustproof and drop-proof, glove operable, plug and play.
· Automated Production Line Fixed ReadingChoose NETUM fixed-mount DPM code reader, support PLC IO trigger, Ethernet communication, continuous high-speed decoding, no manual intervention for assembly line tracking.
· Narrow Space & Deep Hole Parts ScanningSelect macro focal length customized DPM module, narrow-angle light design to avoid internal glare reflection.
3. Select by Harsh Industrial Environment
· Ordinary factory dust environment: RD2023 / NT-1202 (IP65)
· Heavy oil, water splash, high drop impact workshop: GY-80U (IP67 waterproof, oil-proof, 2m anti-drop, wide temperature -20℃~60℃)Netum
4. Select by Data Interface & System Compatibility
· Office computer & simple terminal: USB wired plug-and-play
· Mobile warehouse & mobile inspection: 2.4G wireless / Bluetooth
· Factory automation, MES/PLC system integration: RS232 serial port, EthernetAll NETUM DPM scanners support full industrial 1D/2D symbologies, prioritize native Data Matrix decoding, and provide secondary development SDK for customized integrationNetum.
5. Core NETUM Advantages for Your Choice
NETUM has 15+ years of R&D and manufacturing experience in intelligent identification, independent DPM engine development, stable mass production supply, factory direct cost performance, global after-sales service and multi-model flexible customization for OEM/ODM.