Modernization of control systems for two corrugated cardboard cross-cutting machines

Production task

The customer, a cardboard manufacturing plant, required a complete system for cutting corrugated cardboard with upper and lower knives. The specified cardboard thickness was 3–7 mm, with a web feed speed of 10–100 m/min. Blank lengths ranged from 500 to 9,999 mm, with a cutting tolerance of ±1 mm. The motor power was 22 kW. The new system was developed to replace the existing equipment.

Project scope

The project covered the company's full range of engineering services:

• Development of machine control system documentation in accordance with the technical specification.
• Supply of the control cabinet, operator control panel and control software in accordance with the engineering documentation.
• Installation and commissioning.
• Staff training.

Project results

• The machine control cabinets and operator panels were replaced with equipment based on SIMATIC S7-1200 controllers and SIMATIC HMI KTP900 BASIC panels, including a digital indication device.
• The existing knife-drive servo motors were replaced with Siemens 1PH7 series induction servo motors (22 kW, 132 mm) with feedback sensors.
• The existing frequency converter was replaced with a modular SINAMICS S120 system to control the 1PH7 motor.