Rotary unit for 3D internal inspection of diesel engines
High-precision 360° camera inspection
This high-precision rotary stage was developed especially for 3D camera inspection of the cylinder wall of diesel engines. The positioning system allows measurements in the µm range and is adapted to rough conditions with heavy contamination.
This high-precision rotary positioning system offers three considerable advantages:
High-precision 360° 3D inspection due to an extremely flat rotating unit with a height of just 40 mm
Up to ± 0.012° repeatability under extreme measuring conditions such as dirt and hard clogging
Low-maintenance operation due to the internal meander structure
Maximum stiffness and robustness
A special feature of this rotary unit is that it has been designed for very high moments of inertia. The task was to rotate a centrally positioned arm with a length of up to 1.8 m and two cameras at the ends in a large marine diesel engine in order to be able to take pictures of the cylinder walls. The camera images can be combined into an overall view of the cylinder interior via the position information of the rotary system. For this purpose, the rotary system is inserted through the gas inlet slots of the motor, which limited the height of the rotary unit to 40mm.
The task was solved by designing two clamped thin-section bearings, which provided necessary rigidity through their large diameter even at a low height. A very precisely manufactured crown wheel, which is driven by a motor-gear-encoder combination, is fixed on this turntable that is mounted in this way. The drive can be adjusted backlash-free relative to the crown wheel. The camera data transmission was realized via a central plug in the turntable, which was connected to an internal slip ring. Furthermore, great attention was paid to the robustness of the system, as rough environments and hard knocks were to be expected. In order to protect the inside of the rotary unit from impurities, the overlapping area of the turntable and base body is designed as a meander structure.
Individual extensions and customizations
Engineering services include the fitting of the systems to your structure and the desired controlls. Furthermore, we develop prototypes and like to adapt the systems to the environmental requirements of your application particle emission, radiation, temperature, precision special parts manufacturing, working height, collision protection, safety concept, compensation factor and filter, sensor mounting, brake, decoupling, special lubrication, special colors, holders, adapters, special motors with pharmaceutical approval, comprehensive documentation, test protocoll, llife cycle tests
Fields of application
Automatic Optical Inspection (AOI), Cylinder Inside Measurement, Diesel Engine Inspection, Surface Inspection, Inspection Systems, Tool Measurement