The patented Adaptive DFS uses an EC-Servo Drive for feed stroke instead of a pneumatic cylinder; this enables the system to automatically detect the point of penetration, regardless of material tolerances. Adjusting to actual conditions reduces the effort of setting numerous parameters and allows for an optimal joining process. Since the recognition of point-of-penetration is independent of fastener and product-tolerances, the process automatically adjusts, resulting in an optimized cycle with the highest reliability, shortest cycle-time, less material-stress and reduced set-up time.

Engineered for ultimate flexibility, independent of external influences through out-of-spec tolerances, fastener threading or a possible layer-gap, the Adaptive DFS creates the secure joint in the shortest time. The results are optimally formed funnels and threads, and accurately driven screws.

In addition to the EC-Servo screwdriver, this revolutionary tool uses EC-Servo technology for linear press stroke to generate the substantial downforces needed. Unlike widely used pneumatic cylinders with proportional valves, the Adaptive DFS is capable of instantaneously changing force, which is essential for this unique fastening technique. Its compact and modular unibody design, as well as the closed-loop control system, unlock Deprag’s unique adaptive capability, making this a real engineering marvel. A cylinder is just no match!

The human-machine interface (HMI) main menu provides ease of use and intuitive operator guidance through the simple joint parameters. Assembly sequences are archived and accessible due to unlimited program storage and graphic results.

Other major features

  • Side or top robot mount
  • Compact, rigid unibody design
  • Down-force generated in-line with socket
  • Blow feed or unique screw magazine solution
  • Effortless nosepiece/mouthpiece/bit exchange
  • Unique adaptive capability, applied to a growing number of lightweight or dissimilar layer stacks and fastener types
  • Captured processing-data facilitates extensive process analysis


The Adaptive DFS operates with a speed of up to 8,000 rpm at a maximum of 15 Nm of torque. A central lead-in of the piercing-pressure of up to 3,500 N to the fastener axis prevents transverse load. The entire assembly system is optimized for the shortest cycle times. While the system is processing one fastener, the next screw is pre-fed to the head to minimize feed time between drives.

The servo press stroke allows high-speed pre-positioning of the socket and screw for minimized insertion strokes and complete control in any head-orientation (including underfloor).

Major advantages

  • Highest processing reliability
  • Quickest cycle times
  • Optimal thread forming and elimination of thread damage through closed-loop servo speed and feed
  • Low stress on fastener and part
  • Minimal setup time
  • Designed for advanced high-strength lightweight materials, all the latest flow-fasteners
  • Precise and automatic recognition of penetration points

When compared with punch riveting, high-speed nailing, clinching, friction and spot welding, or rivets, the Deprag Adaptive DFS outperforms all other joining methods for sheet metal and lightweight.