Advertisement Feature Coding, Marking & Labelling
In-Sight cleans up at Miele V
Miele is using an In-Sight vision system from Cognex to ensure a long lifespan for the main spindles of the cable reels which are highly critical vacuum cleaner parts
ision systems integrator Weber Systemtechnik, perched the Cognex In-Sight high above a large telecentric measuring lens with dome lighting. Underneath, white plastic components and tiny metal springs are fitted onto the black main carrier of the drum bearing. The correct positioning and dimensions determine whether the cable drum will work prop- erly. The equipment here checks the completeness, precise positioning and the functional dimensions of the com- ponents after assembly.
Because the inspection requires absolute precision it is manually con- trolled. An operator puts the piece on the component carrier and rotates the transport plate through its four posi- tions. The result can be seen not only in terms of the precision, but also in terms of the total number of compo- nents checked - up to 15,000 items go through the equipment every week. If a component passes inspection, it is moved on for further processing. If a fault is found in a drum bearing, the staff member removes it and enters the fault in a list. The defects identified by the In-Sight vision system have been
categorised by Weber Systemtechnik into various coded classes. If required, the images of the defective parts can be stored so that they can be evaluated in detail at a later time.
Intelligent instruments Twelve measurement points are used for checking the components in a process that’s only possible with machine vision. The metal spring tips of the part peep out of the plas- tic components by just a few tenths of a millimetre. However, it is pre- cisely these tiny parts that the In- Sight vision system records. One of its key instruments for this is image analysis using the PatMax vision tool. PatMax applies sophisticated techniques for geometric pattern matching so that parts can be localised reliably and accurately. This technology allows the geometry of an object to be detected using multiple boundary curves that are not bound to any pixel grid. PatMax looks for similar shapes in the image, without having to base it on specific greyscale values. The VisionView visualisation option
from Cognex handles the visualisation and In-Sight Explorer provides fast and reliable parameterisation. It makes highly flexible and extremely efficient configurations of vision tools possible. It also makes it easy to manage data acquired from an image processing application. Drag and drop vision tools and a range of graphical tools with menu driven tables for the tool properties simplify the process of con- figuring the tasks.
Cognex
www.cognex.com T: 01327 856 040
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Automation JUNE 2013
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