Dürr EcoRP4 painting robot features optimized asymmetric arm geometry

The EcoRP4 represents the latest generation of painting robots from Dürr, succeeding the EcoRP E/L x33iC six-axis model. Designed specifically for high-throughput painting lines and standardized applications, the system allows for flexible integration through floor mounting, linear rails, or vertical installations. Since the introduction of the Ecopaint family in 1998, approximately 20,000 units have been deployed globally. This fourth generation prioritizes life-cycle cost reduction through simplified mechanics and a reduced component count while maintaining established process technology.

Asymmetric design for interior access
A primary structural feature of the EcoRP4 is its asymmetric arm architecture. By offsetting the Tool Center Point laterally by more than 200 millimeters relative to the main axis, the design increases the clearance between the robot arm and the vehicle body. This configuration allows the applicator to reach internal surfaces, door rebates, hinges, and junction zones that are typically difficult to access with symmetrical arm geometries. To ensure uniform processing on high-speed lines, the system is available in two symmetric versions for simultaneous operation on both sides of the vehicle.

Compact configuration for material efficiency
The compact dimensions of the first arm reduce the overall footprint within the workspace, providing a larger operating envelope around the car body. The second arm facilitates the proximity of the applicator, color changer, and dosing pumps to the paint exit point. Shortening the hose lengths reduces valve switching times and minimizes the loss of paint and rinsing agents during color changes. This spatial optimization contributes to the overall material efficiency of the application process.




Integrated process control and maintenance access
Nearly all process control components are integrated directly into the first arm, a specific characteristic of this robot series. The redesigned housing allows for these components to be positioned as close to the atomizer as possible to maximize application efficiency. For maintenance purposes, the first arm features a full cover accessible from the side. This layout reduces the number of required covers and simplifies lateral access, which decreases the time required for technical interventions and routine servicing.

Simplified drive systems and mechanical wear
Mechanical complexity is reduced in the drive units for arms two and three. The bevel gear and drive shaft have been eliminated, allowing the motor drive pinion to be mounted directly onto the motor shaft. By reducing the number of gear stages, the system requires fewer spare parts and experiences lower mechanical wear, which contributes to the overall cost-effectiveness of the unit. The EcoRP4 is compatible with High Transfer Efficiency technology and current application systems, with market availability scheduled for 2027.

Edited by an industrial journalist, Lekshman Ramdas, with AI assistance.

www.durr.com