REDwire Lapp cables part of innovative technology in German printing machines

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For many years, Heidelberger Druckmaschinen has sourced the cables and connectors necessary for its state-of-the-art printing press from Lapp Group.

Heidelberger Druckmaschinen is a leader in sheet-fed offset printing presses. The Speedmaster XL 105 is the company’s top-of-the-line model, meeting the highest quality and productivity standards. Every year, the company produces up to 3,000 printing machines at its state-of-the-art facility in Wiesloch/Walldorf, Germany, for printing in various formats, which it sells to customers around the world. The Speedmaster XL 105 can be fitted with up to 16 printing units, and prints at a speed of up to 18,000 sheets per hour, in 70 cm by 105 cm format.

The innovative technology incorporated in the machine is highly impressive because “it requires a perfect combination of mechanics, electronics and pneumatics,” explains Peter Kaufman, Heidelberger’s head of project planning. 

For many years, he has sourced the cables and connectors necessary for the equipment from Stuttgart-based Lapp Group, a leading supplier of integrated solutions and products in the field. 

Heidelberger draws up precise wiring plans, which it provides to the control box and component manufacturers that supply the parts for the XL 105. These specify where each cable and each connector is to be positioned. As an example, one system with six printing units requires around 2.7 kilometres of cabling.

Each printing unit has its own control box that manages all the printing unit’s functions, such as response to button inputs, sensors, end switches and drive positions, controlling pneumatic, hydraulic and electric actuators, and operating the damping and inking unit drives. All safety functions are designed with built-in redundancy. ÖLFLEX 150 CY and ÖLFLEX CLASSIC 110 connecting and control cables link the control box to the individual drives, such as those for the printing machine’s damping and inking units. Both cables are ideal for machine and plant engineering, are sheathed in PVC, and are flame-resistant. The copper braid of the ÖLFLEX 150 CY provides additional shielding. 

Low-frequency UNITRONIC 100 data cables are used for the end switches and the control section. These control and signal cables are used primarily for electronic devices operating in the milliamp range, wherever compact dimensions and high conductor densities are necessary. Their outer sheath is robust, flexible and resistant.

On the drive side, where ultra-precise gear wheels (with tolerances defined to the thousandth of a millimetre) interlock, the flexible ÖLFLEX Servo FD 790 servomotor cable is employed. It is abrasion-, oil- and flame-resistant, and is sheathed in polyurethane. 

The central control box of the Speedmaster XL 105 also contains low-frequency UNITRONIC LiYCY data cables and SKINTOP cable glands. This central control box is responsible for the supply of power to the machine. It houses the master CPU, the main drive and peripheral units, such as the dryer, ventilation system, the cooling system for damping water and the powder spray.

Peter Trauth, sales engineer at Lapp, comments: “Heidelberger Druck make the most of our expertise as systems providers. Our relationship has developed over several years and, today, Heidelberger employs around 150 Lapp products.”


Lapp Canada Inc

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