EN
+49 2432-98 595-0
☰

Electronic double sheet detection

Date: 2017-05-15

Blog Image
In modern printing, every detail counts. From color precision to paper alignment, ensuring the press operates smoothly is crucial for delivering high-quality results. One of the key challenges in printing—particularly on offset presses—is the risk of double sheets being fed into the machine. Electronic Double Sheet Detection (DSD) is a sophisticated solution designed to prevent this issue and enhance overall productivity. This technology is particularly important for presses like the Heidelberg GTOZP-52, where maintaining a seamless production flow is paramount.

What Is Electronic Double Sheet Detection?
Double sheets occur when two pieces of paper are inadvertently fed through a press at the same time. This can cause a range of issues, from paper jams to misprints and overall press downtime. In traditional printing presses, detecting double sheets was often done manually or through mechanical means, but electronic double sheet detection has revolutionized this process.

At its core, electronic double sheet detection uses advanced sensor technologies to detect the presence of two sheets of paper instead of one. By halting the press before a double sheet causes significant problems, this technology minimizes downtime, reduces waste, and improves print quality.

How Does Electronic Double Sheet Detection Work?
Electronic DSD systems rely on various types of sensors to detect double sheets. These sensors are strategically placed at critical points along the paper feed system, such as the sheet entrance or feed rollers. Here are some common sensor technologies used for electronic double sheet detection:

Ultrasonic Sensors: These sensors emit sound waves that bounce off the paper and return to the sensor. The time it takes for the sound waves to return indicates the thickness of the paper. If the sensor detects a thicker-than-normal sheet, it can trigger an alert or stop the press to prevent the double sheet from progressing further.

Capacitive Sensors: These sensors detect changes in capacitance caused by the difference in thickness between a single sheet and a double sheet. Since double sheets will exhibit a different electrical signature, capacitive sensors can effectively identify when two sheets have been fed together.

Optical Sensors: Using light reflection, optical sensors detect the surface characteristics of the paper. A double sheet will reflect light differently than a single sheet, allowing the system to distinguish between the two.

Mechanical Sensors: In some systems, mechanical devices such as rollers with spring mechanisms are used to detect variations in pressure as the paper moves through the feed. Although not as commonly used today, they still serve as a secondary backup in some cases.

Once a double sheet is detected, the system immediately communicates with the press's control unit, which then halts the machine or activates corrective actions to avoid further complications. This ensures that the printing process continues smoothly, avoiding interruptions and maintaining the integrity of the print run.

The Benefits of Electronic Double Sheet Detection
Reduced Downtime: A printing press can lose significant time when a double sheet goes undetected and causes a jam. The electronic DSD system halts the press before any damage is done, minimizing downtime and getting the press back on track quickly.

Improved Print Quality: Double sheets can lead to poor registration, blurry prints, or incomplete color layering. By preventing these issues from occurring, electronic DSD systems ensure that each sheet is printed correctly, resulting in higher-quality output.

Lower Waste and Cost Savings: When double sheets occur, the paper involved is often discarded, resulting in material waste. By preventing these occurrences, the system helps save paper and ink, which directly translates into cost savings for the printing operation.

Increased Productivity: With fewer disruptions, operators can maintain a steady workflow, producing more prints in less time. This boost in productivity is especially valuable in high-volume printing environments, where time is money.

Enhanced Operator Safety: Double sheets can sometimes cause the press to malfunction or jam in a way that may endanger the operator. By preventing these jams early, the system also ensures the safety of personnel working around the press.

Integration and Customization
One of the key features of modern electronic double sheet detection systems is their ability to integrate seamlessly with different types of printing presses, such as the Heidelberg GTOZP-52, and various paper types and sizes. These systems are highly customizable, allowing for adjustments in sensitivity and detection parameters based on the specific requirements of the printing job.

For instance, a high-end offset press like the Heidelberg GTOZP-52 can be paired with an advanced DSD system to handle a wide range of paper stocks, from lightweight paper to thicker board stock. The system can also adapt to different printing speeds and operational conditions, ensuring optimal performance across a variety of use cases.

Best Practices for Maintaining Electronic DSD Systems
While electronic double sheet detection systems are highly reliable, proper maintenance is key to ensuring they function effectively. Here are a few tips for keeping these systems in optimal condition:

Regular Cleaning: Paper dust and debris can accumulate on sensors, affecting their ability to detect double sheets accurately. Cleaning the sensors regularly ensures that they remain free from obstructions and maintain peak performance.

Calibration: Over time, the sensitivity of sensors may drift. Regular calibration checks can help ensure that the system is detecting double sheets at the appropriate thickness level.

Routine Inspections: Ensure that sensors are properly aligned and positioned. Misalignment can lead to false positives or missed detections, which can disrupt the press operation.

Software Updates: Many modern DSD systems are integrated with the press's control software. Keeping the software updated ensures that the system benefits from the latest advancements in sensor technology and detection algorithms.

Conclusion
In today’s fast-paced printing world, Electronic Double Sheet Detection (DSD) is an essential technology that improves the efficiency, quality, and reliability of printing operations. By preventing double sheet occurrences before they escalate, printers can reduce downtime, cut waste, and maintain higher standards of print quality. Whether it’s a high-end press like the Heidelberg GTOZP-52 or any other type of printing system, DSD helps maintain the smooth and uninterrupted flow of production.

For printing businesses, implementing and maintaining an effective DSD system is an investment that pays off by ensuring a more streamlined, cost-efficient, and safe printing process.

Author: Ahmet Karakus

Tags: Bogenoffset; Digitaldruck; Papierbeutelmaschine; Papierverarbeitung; Rollenoffset; Vollpappe Verarbeitung; Vorstufengeräte; Weiterverarbeitung; Wellpappe Verarbeitung; Zubehör; 1 Farben; 2 Farben; 4 Farben; 5 Farben; 6 Farben; 7 Farben; 8 Farben; 3 Farben; 10 Farben; Verschiedene; Flach&Seitenfaltenbeutel; Klotzbodenbeutel; Kreuzbodenbeutel; Zweinahtbeutel; Druckwerke; Verschiedene; Prägemaschine; Stanztiegel; Stanzzylinder; Querschneider; Rollenschneider; Verschiedene; Zeitungdruck; Akzidenzdruck; Endlosdruck; Etikettendruck; Flexodruck; Tiefdruck; Verschiedene; Etikettenstanzen; Faltschachtelklebe; Autoplatine; Stanztiegel; Fenstereinklebe; Schachtelueberzieh; Verschiedene; CTP-Anlage; Filmbelichter; Plattentwicklungsmaschine; Filmentwickler; Kopiermaschine; Plattenkopierer; Verschiedene; Schneidemachine; Falzmachine; Klebebinder; Sammelhefter; Dreischneider; Zusammentrag; Fadenheft; Buchdeckmaschine; Buchfertigungsstrassen; Verschiedene; Drahtheftmaschinen; Einsteckmaschinen; Kreuzleger; Casemaker; Druckslotter; Hefter & Kleber; Laminiermaschine; Autoplatine; Stanztiegel; Verschiedene; Diverse Geräte; Walzen; Nummerierer werke; Sheet Offset; Digital Print; Paper Bag Making; Paper Converting; Web Offset; Solid Board Converting; Prepress Equipment; Converting; Corrugated Board Conv.; Accessory; 1 Color; 2 Colors; 4 Colors; 5 Colors; 6 Colors; 7 Colors; 8 Colors; 3 Colors; 10 Colors; Miscellaneous; Flat & Satchel; Block Bottom; Cross Bottom; Twin Seam; Print Units; Miscellaneous; Foil Stamping; Handplaten; Punching cylinders; Sheeter; Slitter Rewinder; Miscellaneous; Newspaper; Commercial; Business Form; Label machine; Flexo machine; Gravure; Miscellaneous; Label Punching; Folder Gluer; Autoplaten; Handplaten; Window Patcher; Box Coverer; Miscellaneous; CTP; Film Exposure; Plate developer; Film developer; Copy Box; Plate Copy; Miscellaneous; Guillotine; Folding Machine; Perfect Binding; Saddle Stitching; Three Knife Trimmer; Gathering; Sewing; Block Processing; Book production lines; Miscellaneous; Stitching Machine; Inserting Machines; Cross Feeder; Casemaker; Print Slotter; Gluer & Slitcher; Laminator; Autoplaten; Handplaten; Miscellaneous; Other Device; Roller; Numbering device; Baski Ofset; Dijital Baski; Kagit Torba Makinesi; Kagit Isleme; Rulo Ofset; Kati Karton Isleme; Ön Hazirlik Cihazlari; Ileri Isleme; Dalgali Karton Isleme; Aksesuar; 1 Renk; 2 Renk; 4 Renk; 5 Renk; 6 Renk; 7 Renk; 8 Renk; 3 Renk; 10 Renk; Çesitli; Düz ve Çanta Tipi; Kare Taban Çanta; Çapraz Taban Çanta; Ikili Dikisli Çanta; Baski Ünitesi; Çesitli; Yaldiz Baski; Elle Basma Makinesi; Döner Silindiri; Kesici; Rulo Kesici; Çesitli; Gazete Baskisi; Ticari Baski; Sürekli Form Baski; Etiket Baskisi; Flexo Baski Makinesi; Derinlik Baskisi; Çesitli; Etiket Düzlemesi; Kutu Yapistirma; Otomatik Platen; Elle Basma; Pencere Kapama; Kutu Kapatma; Çesitli; CTP; Film Pozlama; Plaka Gelistirici; Film Gelistirici; Kopya Makinesi; Plaka Kopyalama; Çesitli; Kesme Makinesi; Katlama Makinesi; Mükemmel Ciltleme; Zimbalama; Üçlü Kesici; Toplama; Dikisli Ciltleme; Blok Isleme; Kitap Üretim Hatlari; Çesitli; Dikis Makinesi; Yerlestirme Makinesi; Çapraz Besleyici; Kitap Kapatma Makinesi; Baski Slotteri; Yapitirici & Zimba; Laminatör; Otomatik Platen; Elle Basma; Çesitli; Diser Cihazlar; Rulo; Numaralandirci Cihaz; Impression feuille à feuille; Impression numérique; Machine à fabriquer des sacs en papier; Traitement du papier; Impression offset en bobine; Transformation de carton plein; Équipements de prépresse; Transformation; Transformation de carton ondulé; Accessoire; 1 Couleur; 2 Couleurs; 4 Couleurs; 5 Couleurs; 6 Couleurs; 7 Couleurs; 8 Couleurs; 3 Couleurs; 10 Couleurs; Divers; Type Plat et Sac; Sac de Fond Carré; Sac de Fond Croisé; Sac à Double Couture; Unité d'Impression; Divers; Impression Dorée; Machine de Stamping Manuel; Cylindre Rotatif; Coupeuse; Coupeuse de Rouleaux; Divers; Impression de Journal; Impression Commerciale; Impression de Formulaires Continus; Impression d'Étiquettes; Machine Flexo; Impression en Profondeur; Divers; Mise en Forme des Étiquettes; Collage de Boîtes; Platen Automatique; Estampage Manuel; Fermeture de Fenêtres; Fermeture de Boîtes; Divers; CTP; Exposition de Film; Développeur de Plaques; Développeur de Film; Machine de Copie; Copie de Plaques; Divers; Machine de Coupe; Machine de Pliage; Reliure Parfaite; Agrafeuse; Coupeuse Triple; Rassembleuse; Reliure Cousue; Traitement de Blocs; Lignes de Production de Livres; Divers; Machine à Coudre; Machine de Placement; Alimentation Croisée; Machine de Fermeture de Livres; Slotter d'Impression; Colle & Agrafe; Laminateur; Platen Automatique; Estampage Manuel; Divers; Autres Équipements; Rouleau; Compteur de Nombres; Impresión offset de hojas; Impresión digital; Máquina para hacer bolsas de papel; Procesamiento de papel; Impresión offset de rollo; Procesamiento de cartón sólido; Equipos de preimpresión; Conversión; Procesamiento de cartón corrugado; Accesorio; 1 Color; 2 Colores; 4 Colores; 5 Colores; 6 Colores; 7 Colores; 8 Colores; 3 Colores; 10 Colores; Varios; Tipo Plano y de Bolsa; Bolsa de Fondo Cuadrado; Bolsa de Fondo Cruzado; Bolsa de Doble Costura; Unidad de Impresión; Varios; Estampado en Oro; Máquina de Estampado Manual; Rodillo Rotativo; Cortadora; Cortadora de Rodillo; Varios; Impresión de Periódico; Impresión Comercial; Impresión de Formato Continuo; Impresión de Etiquetas; Máquina de Impresión Flexográfica; Impresión de Profundidad; Varios; Planteamiento de Etiquetas; Pegado de Cajas; Platen Automático; Estampado Manual; Cierre de Ventanas; Cierre de Cajas; Varios; CTP; Exposición de Película; Desarrollador de Placas; Desarrollador de Películas; Máquina de Copias; Copia de Placas; Varios; Máquina Cortadora; Máquina de Plegado; Encuadernación Perfecta; Engrapadora; Cortadora Triple; Recogedor; Encuadernación con Costura; Procesado de Bloques; Líneas de Producción de Libros; Varios; Máquina de Coser; Máquina de Colocación; Alimentador Cruzado; Máquina de Cierre de Libros; Slotter de Impresión; Pegamento & Engrapado; Laminador; Platen Automático; Estampado Manual; Varios; Otros Equipos; Rollo; Contador de Números;Agfa; Agrafix; Baumann; Baumüller; BIMEC SRL; Bindomatic; BITS VOF; Bobst; C.P. Bourg S.A./N.V.; Cito; Cyklos; DAKIOU; DERITEND; Duplo; EBA; Eigenbau (Self-build); Elcos; Eurofold; Eurotechnica; FKS; Foliant; Fuji; Fujifilm; Gallus; GBC; Glunz & Jensen; GUK; Halm; Hang; Heiber + Schröder; Heidelberg; Heidelberg Stahlfolder; Hohner; Horizon; INATEC; Italdibipack; Jagenberg; Josef Foellmer; Kahl; KAS; KBA; KMK; Knorr; Kolbus; Komori; Krause; König & Bauer (KBA); Lintec; MAN Roland; Masterline; Mathias Bäuerle / Baeuerle; Mathias Bäuerle / MB-Bäuerle; Matrix; Max Simmel; MBO; Meccanotecnica; Minolta; Mitsubishi; Mueller Martini; Multigraf; MUTOH; Müller Martini; Nagel; Neolt; Neschen; Nilpeter; OMM; OMMA; Pandway; Perfecta; Pitney Bowers; Plockmatic; Poege; Polar; Polar Mohr; Polyair; Robapac; Robatech; Roland; Ryobi; Sakurai; SCREEN; Screen/FujiFilm; Shinohara; Shoei; Solema; SPS Rehmus; Stahl; Stenz Feeder; Stock; Stube Foerdertechnik GmbH; Thando; Theisen & Bonitz; Viprotech; VITS; Wahli-Stream Feeder; Wohlenberg; 1000 LM laminator; 103 F. AU Pallet turner; 106-MTF autom. foil stamping and die cutting; 107-30; 108 Double head paperdriller; 115; 115 ED; 115 EM-MONITOR; 115 MCS 2 TV; 137 EMC; 14 Tonnen Forklift; 1500-BMY Semi Autom. Die Cutting & Creasing Machin...; 168 HTVC + Basa 7; 185-1; 2 head drilling machine; 201 DFS; 235-121; 280 B; 2L 450EC; 300; 310+; 321; 340 Punch and Closing; 3501 Splitting SAW; 400/4; 4000; 52-2; 522 H; 522 HE; 524 GX; 551; 76 EM; 78 ES; 78 X; Abkantgerät Auto; AC 8000S; ACENTO II S (Screen PlateRite 4300S); Acoro A7; Airspace 9000; APC-T61 hydraulic cutter; Babypack; bizhub press C71hc; BQ 140; BQ 240; BQ 440; Bravo S; BS 25002 PUR; BSW 2/500 L pile turner; BY-800F Autom. Foil Stamping & Creasing Machine; C64-50 autofeed die cutter; CardExtra; CAS 35/2 PBA; CAS 52-4/4; CAS 524 SE; CB 16 stacker; CD 74 (machine parts); CD 74-5-P-C; City 5000; CM-1500A (2R) Roll to Sheet machine; COLDLAM 1400-NE; Compacta C618 48 pages; Conveyor Belt; Creo Magnus 400; cut-tec 76; DB 200; DC 8000 S; DI 425; Diamond 3000 S -5; Digifold creasing and folding machine; Dortmund-Kraft; Double head paperdriller; DUPLO DBMI DSC10/60I line; E3304 cutting machine; EK 420; EM 280; ES 5040 21; Eurobind 600; Exposure-washout-dryer unit Polimero A4; EXS-700 Strapping Machine; F-1050 K Window patcher machine; FA 35/2; Flexo 1600; Folding units for first pocket; FT250 Manual Foam Trim Pro 250; GM 5 Spine taping machine; GMP 450; GT; GTO 46; GTO 46 with N+P; GTO 52-2; GTO 52-2 NP; GTO FPP - 52; GTOV 52; GTOV-S 52; GTOVP 52; GTOZ 52; GTOZP-52; GTOZP-S 52; GYKM-2800 Printer Slotter Inliner; HBJ-D1200 Paper board erecting forming machine; HBJ-D800; HM 6 duble head magazin stitching; Horizon semiautomatic screen printing machines; Iram 16; JET LAM 1600; JP-TWOD-6D; K 52/4 KL - F4; K 820-6 KTLT; KC 56/4 KTL; KD 78/6 KTL; KH 78-4-KTL-RFH-82; KM 600; KSD; L-1000-G-3BF; L375D Laminator; LD 901 Map Folder; Lega 80 - Pressstation; Letterpress museum piece; Lithrone LSX-629 H+F+C+E+D (H-UV-L); LL-600-K-3; LPM 360 Laminating; Mach Eight; Magnus 800 Quantum; Mailmaster 565HS; Mariner 2 perforating machine; Master E; Masterline 410T; MC 8; Merit / 3671; MO Numbering & Perforating Unit; MOZP; MR 500; MULTIGRAF 252 CREASER / PERFORATOR; Multinak S; OD-4012; OHT; P460 Wiro Punching; PB 1006 1 Head drilling; PB 2015 drilling machine; Perfect binder with PUR; Platewriter 2400; Plocmatic 1000 Collating and Stitching Line; PM 52-1 NP; PM 52-2-P; PM 52-4-P; PM GTO 52-2 + with numbering + perforating; prestige FOLDNET 52; PSV 600; PT-R 4100; PT-R 4300; PT-R 4300 E; PT-R 4300 E/ Luxel T 6300 CTP; QRV Variocut; R 506 OB LV; R 705 3B LW; R 705 P 5/0 - 2/3; R 706 3B; RAPIDA 162A 6+lak PWVA ALV3; Roba 40 nozzle glue system; ROBOTAPE 50 M; ROTADIE 15; RSP Easy (Perforating tool); SA 145 APK; SBG; SDD BLM6100 Booklet Maker; SHL 12 P pile lift; SL 12 P; SL 40 Stack Lifter; SL-2-V-E; SM 52 - 5P3; SM 52-2; SM 74 4-P3-H; SM 74 Numbering & Perforating Unit; SM1-600; SORKZ; SORM; SP 1120-E; Stahlfolder TI 52-4-X; Stahlfolder TI 52/6 Proline; Star; Stitching machine; StitchLiner 5500; Suprasetter A52/A74; SX 74-2-P; T 36/4 - F.2; T 530 - 3 - X; T 530-1-53/4 F; T 530-1-53/4F; T 800 4-4-X; T 960-1-960/4; T 960-1-960/4 T 960-2-960/4; T49/4.KB-F.2; TCS 250; TM 530; TMA-20; TP; TrimScor DC545; Twin Screw Extruder LTW 160; UC 1100 Collator; VAC-100a; VALUEJET VJJ-1624; VFZ 52; Vipromat-S semiautomatic screen printing machines; Vitessa Classic Screen Printing with UV Dryer; WJ-1800 Corrugated cardboard making machine; WP 1400 matic window patcher; WP 76; XL 106-4; XL 75-5-P+L C; Z2 Mobile Knife Folding Unit; ZLFM-1080SC Autom. Laminating Machine + powder cle; ZLFM-800SC Autom. Film Laminating Machine + powder; ZLFM-800SJ Autom. Filmlaminiermaschine