In this way, scrutinising individual work steps in the production of the subassemblies, always being on the lookout for optimisation potential or different points that influence the automated process were part of the project team’s planning phase. So long as welding was done by hand, less precision in the prefabrication was easier to make up for. Now that the robots are fabricating, it is a lot easier if the components are delivered already precisely made. Because: The robot is precise.
Bussnang’s site experience with robot technology goes back to the year 2005. Since then, two technical areas in particular have changed the software and the component communication via Profinet. One advantage the digital communication protocol renders is that fewer cables must be laid. In addition, changes are much easier to manage, as with additional sensors or an additional signal, only the protocol must be adjusted.
The choice of the first robot in 2005 was still a lengthy process until the decision for Fanuc was made. The main decisive factor was its compact design and the various possibilities associated with the package of the Arcwelding Software. Fanuc robots are deployed “off-the-shelf.” The LR Mate 200iC and Arc Mate 120iC with different software options are currently deployed. In the new plant there are two Arc Mate 120iCs currently working, one on the left and one on the right. The robots are mounted on a platform, which is in turn sitting on a travel rail. Thus, the entire length of the vehicle body remains accessible. All chassis and travel axes are driven by high-precision steering racks and Fanuc servomotors, which are easily integrated into the robot control as axes.