Monday morning, nine on the dot. The quality manager at JURA’s production partner carefully empties a box full of brewing sieves onto the oscillating conveyor at the centre of a metering unit. The parts are about 30 millimetres, or just over an inch, in diameter. They are produced by a Swiss subcontracting company that works primarily for the watchmaking industry. Each sieve has hundreds of fine, tiny holes, much too small for them to be punched or drilled with the necessary precision. During production, the company uses a special innovative technique that it has developed and improved to perfection.
The diameter of the holes is defined precisely to one-hundredth of a millimetre. The acceptable tolerance is about the thickness of a human hair. Before assembly, JURA insists on painstakingly inspecting every single sieve. But how do you measure millions of tiny holes with the necessary precision?
Quality control using state-of-the-art software
‘Optically, with a high-resolution camera and state-of-the-art software,’ the quality manager reveals. He then starts up the test unit. The conveyor shudders into motion. Vibrations set the brewing sieves moving. Like the peloton in the Tour de France stretched into a thin line on a pass in the Pyrenees, they climb the coil. During their journey, strategically placed guides ensure that they are in precisely the right position when they reach a pick-up, where they are captured using a high-resolution camera. A flash of orange light briefly lights up the room.