Screwdriving made simple

Assembly processes with tiny screws (e. g. M1 X 2mm), which are typically used for the assembly of mobile phones or hearing aids, represent a complex task for automated screwdriving systems due to the correct positioning of the screws and the low but precise torque requirements. STÖGER AUTOMATION, the screwdriving and fastening systems specialist, has come up with a groundbreaking handling and assembly solution featuring highly dynamic small servo motors from the cyber® dynamic line family and real-time capable servo amplifiers from WITTENSTEIN cyber motor’s simco® drive series.

A revolutionary development
With the small motors and drive amplifiers from WITTENSTEIN, STÖGER AUTOMATION was able to implement a highly innovative solution for the reliable provision, insertion and tightening of miniature screws without the need for additional sensors. A special MotionTask makes it possible to obtain and read out the torque precisely via the drive controller when tightening the screw. The compact external dimensions of the small servomotors suitable for industrial use, their low mass and intelligent drive amplifiers with a high switching frequency and an extraordinarily high current resolution are the decisive advantages of our drive solution for the company. In addition, there is the variable configuration of the interfaces to higher-level controllers, as the automatic srewdrivers can be used both as individual devices, e.g. in the version with an X/Y axis system and in large systems. WITTENSTEIN cyber motor has developed a linear actuator for the Z-axis to guide the screw during the screwdriving process, which convinces with its ideal functionality and high cost-effectiveness.


STÖGER AUTOMATION: LEADER FOR SCREWDRIVING AND FASTENING SYSTEMS

STÖGER AUTOMATION: LEADER FOR SCREWDRIVING AND FASTENING SYSTEMS

STÖGER AUTOMATION GmbH of Königsdorf (Bavaria, Germany) is the technology leader when it comes to developing and manufacturing highly efficient screwing solutions for workpieces.

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A DAUNTING CHALLENGE

The WITTENSTEIN servo technology helped us develop a screwdriving system that sets benchmarks for miniature screws.

Lorenz Stöger

A DAUNTING CHALLENGE

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SPEED IS NOT THE ONLY FACTOR

SPEED IS NOT THE ONLY FACTOR

The screwing process takes place with a torque of less than 0.05 Nm; a motion task reduces the speed for tightening to ensure an optimal, secure connection with a defined tightening torque.

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COMPACT, DYNAMIC, PRECISE: THE SMALL SERVO MOTORS IN THE CYBER® DYNAMIC LINE

COMPACT, DYNAMIC, PRECISE: THE SMALL SERVO MOTORS IN THE CYBER® DYNAMIC LINE

The dynamic line 22 size which is used for this application does not simply offer the optimum ratio of speed to torque; it also enables the distance between the two spindles of the screwdriving system to be reduced to a minimum. Screws can thus also be inserted at points that are normally inaccessible and the screwing cell has an extremely small footprint.

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HIGH RESOLUTION, PROGRAMMABLE MOTION TASKS: THE SIMCO® DRIVE SERVO AMPLIFIERS

HIGH RESOLUTION, PROGRAMMABLE MOTION TASKS: THE SIMCO® DRIVE SERVO AMPLIFIERS

Each motor of the small drive systems is operated by a drive amplifier of the simco® drive series.

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SERVO DRIVES READY FOR SCALING THE SCREWDRIVING SYSTEM

SERVO DRIVES READY FOR SCALING THE SCREWDRIVING SYSTEM

The simco® drive servo amplifiers and the small servo motors in the cyber® dynamic line paved the way for STÖGER AUTOMATION to realize a high performance drive solution for their screwdriving system for miniature screws. The industrial grade solution can be easily parametrized, connected and commissioned by the specialist manufacturer.

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