Robot appli­ca­tion

Screw setting unit

The screw setting unit SEL is modular – it consists of the SEL base module with a DS nutrunner that is adapted to the robot and the SEL coupling module with vacuum mouth­piece. The coupling modules, designed for diffe­rent screw geome­tries, can be exchanged without tools and are coupled to the base module and pneuma­ti­cally locked.

For a mix-up-free place­ment of the coupling modules, the SEL inter­ch­an­geable device offers space for up to 5 coupling modules – the respec­tive coupling module is stored in a suitable holder.

Screw setting unit


(1) Equipped with the SEL screw setting unit, the robot moves to the tool change position and discon­nects the coupling module. The robot moves the SEL to the bit changing machine to pick up the bit which is suitable for the screw joint. (2) The coupling modules are in pick-up position. The robot positions the base module on the coupling module with the correct mouth­piece. The coupling module is locked and connected to the base module.

(3) The screw is picked up by the vacuum mouth­piece with negative pressure and placed at the screwing joint by the robot – the tightening process is started. The screw is tightened several turns, then the mouth­piece is lifted up from the screw head and the screw is tightened until the final tightening stage is reached – this prevents torque distor­tion due to frictional torques.


  • SEL Basic module
    Basic module with adapt­a­tion for nutrunner (DS or others)
    Spring output
    Quick-release bit holder
    Blade holder
    Pneumatic-electric supply interface
  • SEL Coupling module
    Coupling modules for diffe­rent screw geome­tries
    Docking of the coupling module to the base module with pneumatic lock
    Coupling modules tool-free exchan­geable
    Centring pins for a defined pick-up position
    Poka-Yoke coding for error-free place­ment in the inter­ch­an­geable device
    Vacuum mouth­piece
  • SEL Inter­ch­an­geable device
    Space for 5 coupling modules
    Max. 5 holders, adapted to the specific coupling module (Poka-Yoke coding)
    Locking bolt for locking / unlocking the coupling module
    Linear unit for exten­ding the holders mounted on the exchan­geable plate