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FIVE, Farnborough(GU14 6XL)
21/03/2017(09:30) - 23/03/2017
The UK's LARGEST regional manufacturing technology, electronics and subcontracting exhibition. (more)
Messe Stutgart, Germany
28/03/2017 - 30/03/2017
As the world’s leading exhibition for the fastener and fixing industry Fastener Fair Stuttgart (more)
Manchester Central Convention Complex(M2 3GX)
04/04/2017 - 05/04/2017
Industry 4.0, the 4th industrial revolution, smart manufacturing, digital factories…these are (more)
Arena MK, Milton Keynes(MK1 1ST)
The new Machine Vision Conference & Exhibition gives you insight into the latest developments in (more)
A basic guide to continuous-flex cables
Cables constructed in layers are significantly cheaper to produce, therefore some manufacturers offer 'continuous-flexing cable' with this low-cost approach. However, these cables are often constructed without attention to pitch length, pitch direction or centre-filler design and typically have fleece wraps and binders with a sleeve-extruded jacket.
In a short travel, long-travel gliding or other demanding flex applications, they tend to fatigue and their insulation and jacket compounds lose their tensile and elongation properties. This greatly reduces service life. As these materials break down, the cable core is compromised and the torsion forces of the cabled conductors release and untwist in parts of the cable. This causes a 'corkscrew' effect.
The risk of such problems is increased with cables that have multiple layers (usually more than 12 conductors).
In nearly all Igus Chainflex cables, the conductors are bundled rather than layered to eliminate these problems (see pic). The wires are twisted with a special pitch length and the resulting conductors are cabled into bundles. For large cross sections, this is done around a strain relief element. The conductors are then bundled around a tension-proof centre.
The multiple bundling of the conductors changes the inner radius and the outer radius of the bent cable several times at identical intervals. Tensile and compressive forces balance one another around the centre rope, which provides inner stability. As a result, the cable core remains stable even under maximum bending stress.
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