Assembly in Action / Columns / Welding Assembly

Assembly in Action: Servo Drives Ease Integration of Welding Robots

Designing and manufacturing high-bay warehouses is a specialty of SSI Schäfer, a German international logistics company. These warehouses feature welded steel beams that are used as horizontal load carriers in shelving systems.

assembly in action 3
SSI Schäfer welds steel beams that are used
in the manufacture of the company’s high-bay
warehouses. Photo courtesy Lenze

Recently, SSI needed to integrate a new welding cell into its plant’s overall control system. The cell measures 16.5 by 7 meters and features 10 six-axis Romat robots made by Cloos. The robots are set up in pairs.

Cloos and Lenze integrated the cell into the control system in just four weeks. The tandem achieved such a quick setup by using Lenze’s L-force Engineering method to determine system parameters and configuration.

The cell’s material flow drive system ensures that all beams are fed, aligned and held in the proper position before being welded by the robots. Cloos selected several Lenze products for the drive system, including Servo Drives 9400, GKS helical-bevel and GKR bevel-geared servomotors, and MDSLS servo spindle motors.

GKS motors have rated torques up to 11,606 newton-meters, GKR motors up to 450 newton-meters. The MDSLS motors handle translational movements.

The servo drives coordinate the feeding of beams into the robots’ working areas. Cloos likes that the drives offer comprehensive modularity and preconfigured solutions for functional motion. In addition, the drives can be equipped with fieldbus and functional modules that use conventional technology or Ethernet-based interfaces.

Cloos uses Ethernet to access the servo drives, which feature an integrated two-port switch that makes it easy to loop communication. The communication modules also enable galvanic separation of the network and base device.

Since installation, SSI Schäfer has run more than 1 million support beams through the welding cell. The cell has experienced no downtime and a reject rate of less than 0.1 percent.

For more information on servo drives, call 800-217-9100 or visit

Did you enjoy this article? Click here to subscribe to Assembly Magazine.

You must login or register in order to post a comment.



Image Galleries

Behind the Scenes at Ford's Michigan Assembly Plant

People are the heart and soul of the 2012 Assembly Plant of the Year. This slideshow shows some of the men and women who build three different types of electrified vehicles alongside traditional gas-powered cars on the auto industry’s most flexible assembly line—Ford’s Michigan Assembly Plant in Wayne, MI. Photos courtesy Ford Motor Co.


 Live from The ASSEMBLY Show, Bob Wood, president of ECI Spinnomatic, talks about his company’s newest product: a fully automated riveting cell equipped with a rotary indexing table, a six-axis robot, an orbital forming unit, and laser sensors. 

More Podcasts

Assembly Magazine

assembly april 2015

2015 April

The 2015 April Assembly includes our cover story on Assembly Automation in the Aerospace Industry plus much more. Check it out today!

Table Of Contents Subscribe

Trans-Pacific Partnership

Will the Trans-Pacific Partnership Agreement be good for U.S. manufacturers?
View Results Poll Archive


Welding: Principles & Practices

This text introduces students to a solid background in the basic principles and practices of welding.

More Products

Clear Seas Research

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications,Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


facebook_40px twitter_40px  youtube_40pxlinkedin_40pxgoogle plus  

Assembly Showrooms

ASSEMBLY Showrooms