eddydector® - Eddy Current Crack
Detectors - Flaw Detectors

Multi-Channel Crack Detectors for Component Part Inspection.
Reasonably-Priced Quality Control

eddydector® crack detectors are eddy current instruments specifically developed to test components for surface cracks, either prior to, or after, grinding, machining or other production sequences. The eddydector®’s principle of operation is based on the environmentally clean eddy current test method. Cracks as small as 0.05 mm in depth can be detected in components parts with predominately round finished surfaces. The signal amplitude varies according to the depth of the crack; however, the effects of alloying and surface conditions will determine crack detection ability.


The system is capable of testing with eight probes at a time. Each of the plug-in test channels is an independent, individually adjustable eddy current instrument, which makes it possible to provide a complete compact test station for multi-point inspection of camshafts, valves, etc. using just the one handy instrument.


The output signals of each channel are transferred in analog form (X and Y) to an oscilloscope or a printer. Defect signals are passed on via opto-interface to a control system (or PLC) operating marking or sorting mechanism. Each test channel has its own bar graph display for crack signals. Defect signals remain stored until reset by either an external “Quit” signal or by manual operation of the “Quit” touch key. An extremely rapid inhibit signal allows reliable crack detection very close to the bored holes, where normally such cracks would be concealed by the borehole signal.


Damaged eddy current probes or cable are instantly recognized by a special probe-failure supervision feature. An inbuilt overload sensor prevents incorrect setting of the system. Despite the versatile possibilities, the eddydector® is extremely easy to handle and operate, and adjustments are very simple and easy to carry out.


The fully-equipped system consists of a high-frequency shielded case with power supply, microprocessor plug-in unit with LCD display (4 x 20 characters) and operational keys, plus up to eight test channels.

(Top) When only one test channel is required, the oscilloscope, test channel and display module are included in one handy package.

(Bottom) Adjustable filters and low-noise amplifiers guarantee a high signal-to-noise ratio, thereby enabling very small defect signals to be detected.


All set-up information is displayed on a large, easy-to-read LCD screen. Adjustment of the set-up parameters is accomplished by keys “+” and “-”. A three-level key-operated switch provides security for unauthorized alterations.


Set-up parameters for individual applications are stored on a microprocessor memory together with the supervisory functions required during automatic testing. An optical isolated interface provides connection to a PLC for monitoring of each crack detector channel. A wide selection of eddy current probes are available solve even the most problematic applications. Special coils and probes can be developed to fulfill special requests.

TECHNICAL DATA

ibg NDT Systems - Designers and manufacturers of state-of-the-art NDT eddy current testers, instruments, and systems for automotive and
aerospace critical parts. Crack detectors and crack detection systems specialists.