Published: 2025-07-09 13:44:17
The lifespan of high-flexibility servo cables can be increased by three times, mainly thanks to material upgrades, optimized structural design, and improvements in production processes. The following is a detailed introduction:
Material Upgrade:
Sheath Material: Traditional servo cables often use ordinary PVC materials, which can easily cause molecular chain breakage, cracks, and aging when bent repeatedly. High-flexibility servo cables, on the other hand, mostly use special elastomer materials such as polyurethane (PUR), which offer better flexibility and fatigue resistance, as well as wear resistance, oil resistance, and tear resistance, allowing them to adapt to harsh environments and significantly extend the cable's service life.
Conductor materials: High-flexibility servo cables typically use high-purity oxygen-free copper, which reduces internal impurities and defects in conductors. Combined with special annealing processes, this improves the ductility of the copper wire. Some products also have tin plating on the conductor surface to prevent oxidation, reduce friction losses, and enhance cable durability during frequent movement.
Structural Optimization:
Stranded layered structure: The conductors of high-flexibility servo cables are made of multiple fine copper wires twisted helically at a specific pitch. This design can effectively disperse bending stress and prevent copper wire breakage caused by stress concentration. Compared with traditional coarse copper wire structures, clusters of fine copper wires can withstand more bending cycles.
Shielding Layer Design: Highly flexible cables often use tinned copper wire braided shielding or spiral-wound shielding, which is more flexible than aluminum foil shielding. A high-quality shielding layer not only provides good electromagnetic compatibility but also serves as the cable 'skeleton,' maintaining structural stability during bending. Some products also add tensile-resistant fiber layers inside and outside the shielding layer to further reduce the mechanical stress on the conductor.
Buffer design: Some high-end servo cables add a special filling layer between the sheath and the insulation layer, which can absorb tiny displacements generated during bending, prevent internal components from rubbing against each other, reduce the rate of material wear, and extend the cable's lifespan.
Process Improvement: By optimizing the cabling process with closely spaced, structurally stable short pitches, internal stress in the cable during bending can be reduced, preventing conductor breakage or signal interference, and helping to extend the cable's service life.