Hannover Messe 2019 Inductive position sensor based on Eddy Currents robust construction

| Editor: Theresa Knell

Inductive position sensors of the eddyNCDT series monitor gaps during aluminium die-casting. The robust sensor construction enables measurement under demanding environmental conditions.

The eddy NCDT system consists of a compact and robust controller which forms a unit together with the cable and sensor. The integrated system design improves the robustness.
The eddy NCDT system consists of a compact and robust controller which forms a unit together with the cable and sensor. The integrated system design improves the robustness.
(Source: Micro-Epsilon)

In the production of aluminium die-cast parts, liquid aluminium is pressed into a mould under high pressure. Both tool moulds have to be held together with enormous force. Despite the strong pressing force, the tool halves are pushed apart minimally. This procedure is the tool breathing. Although minimal openings are desirable, if the gap is too big, edge burrs are created on the part. This so-called flitter demands post-processing to produce high quality in the end product. If, furthermore, aluminium residues are left on the tool, increased wear is the result, which reduces the service lifetime.

By monitoring tool breathing using inductive position sensors working on the eddy current principle, high product quality with simultaneous longer service lifetimes and minimised post-processing are possible, Micro-Epsilon tells us. Usually, three to four eddy current systems of the eddyNCDT 3005 series are used to enable uniform monitoring of the gap at several measurement points.

A system consists of a compact and robust controller which forms a unit together with the cable and sensor. The system can be fitted retrospectively.

Visit Micro-Epsilon Messtechnik at Hannover Messe in Hall 9, Booth D05.

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