eddyscan® H, F, and C Rotating Eddy Current Scanners
For High-Speed Crack & Grinder Burn Testing on Cylindrical & Flat Components

ROTATING SCANNERS FOR CRACK AND GRINDER BURN DETECTION

HARMONIZED FAMILY FOR HIGH-SPEED CRACK DETECTION

The eddy current test method has established itself for years with 100% crack detection of cylindrical parts. 

Rotating eddy current systems scanners can increase productivity tremendously. The method requires movement of the test piece surface relative to the crack detection probe. When a crack or pore passes the sensitive area of the probe the test instrument shows a relating signal. Usually the rotationally symmetrical test part is rotated while the crack detection probe tests the zones of interest. The advantages of this method are flexible use and rather simple mechanical effort.

Another way is rotation of the eddy current probe while the test piece is stationary. Geometry flexibility suffers as a result. But rotating the probe provides enormous advantages with regard to test time. Test machines with rotating scanners keep up with and even exceed preceding production lines without problems because the probes can be turned with 3000 rpm and more.

In rotating scanners the probe or probes are integrated into a rotating disk mounted onto a rotor. A rotational transformer, which is the heart of that technology, transfers the undistorted signals from the probe to the crack detection instrument.

Rotating scanners are well suited for testing rotationally symmetrical and cylindrical pieces, like a string of bearing rollers, piston rods, pinion pins and so on, whose outer diameters are scanned for surface open defects. Cylinder liners are also an application (individual or in the motor block) and all other kinds of boreholes whose inner diameter must be tested for cracks.

Ibg offers the rotating scanner family eddyscan® which has been developed specially for the demanding applications in the automobile industry. The eddyscan® H for testing the outer diameter of cylindrical parts is available stepwise up to a part diameter of 63 mm as a two or four channel version. Four channel version means four probes integrated in one probe disk, which can achieve a throughput of up to 800 mm/sec.

The eddyscan® F rotating eddy current scanner is applied as one or two channel device for testing flat surfaces, cylindrical inner diameters of boreholes, cylinder liners or bearing rings for cracks. Special designs may even test conical surfaces. The diameter range starts at approx. 3mm with no limits upwards.

The eddyscan® C is a development specially for motor block testing. A self-centering rotating crack detection probe scans the bores of cylinder liners for cracks and pores. An X-Y-slide balances the dimensional and position tolerances of the cylinder boreholes.

All rotating scanners are equipped either with fixed probe disks or diameter adjustable disks. Most of the ibg eddy current crack detection probe types can be used in the probe disks so that the test equipment is always perfectly arranged for the particular test task.

The height adjustable maintenance slide is available as additional equipment enabling precise adjustment of the height of the rotating scanner for different part diameters. Furthermore, it enables the rotating scanner to move to a maintenance position in order to be able to convert the probe disk to another part diameter for example.