Special drag chain cables are designed specifically for frequent bending and movement in dynamic drag chain systems, and are widely used in fields such as robotics, automation equipment, and CNC machine tools. Its usage environment is complex, often facing challenges such as high-frequency bending, mechanical friction, oil contamination corrosion, etc. Therefore, the following common problems are prone to occur:

1. Cable breakage or core wire damage

• reason：
  • Insufficient bending radiusThe drag chain cable needs to move repeatedly within the minimum bending radius. If the bending radius is too small, the internal conductor and insulation layer of the cable will break due to excessive stretching or compression.
  • The bending frequency is too highHigh frequency bending (such as hundreds of times per minute) can cause material fatigue and accelerate fracture.
  • Improper installationThe cable is not properly secured or the drag chain is overfilled, resulting in uneven local stress.
• PerformanceSudden power outage, signal interruption, or cracks in the outer sheath of the cable during equipment operation.
• Solution：
  • Select cables that meet the minimum bending radius requirement (usually 6-10 times the outer diameter of the cable).
  • Optimize the drag chain design to ensure sufficient space for cable movement.
  • Use anti fatigue materials (such as highly flexible conductors, special woven structures).

2. Sheath wear or cracking

• reason：
  • mechanical frictionLong term friction between cables and the inner wall of drag chains, other cables or equipment components.
  • Environmental corrosionOil stains, chemicals, UV rays, etc. accelerate the aging of the protective sheath.
  • temperatureharshHigh temperature causes the sheath to become soft, while low temperature makes it brittle.
• PerformanceScratches, cracks, and even exposed core wires appear on the surface of the sheath.
• Solution：
  • Choose wear-resistant and corrosion-resistant sheath materials (such as PUR, TPE, TPU).
  • Increase the thickness of the outer sheath or add a woven layer to enhance wear resistance.
  • Avoid contact between cables and sharp edges, and regularly clean the inside of the drag chain.

3. Signal interference or unstable transmission

• reason：
  • Electromagnetic interference (EMI)When power cables and signal cables are parallel, electromagnetic fields interfere with each other.
  • Shielding failureThe shielding layer is damaged or poorly connected, resulting in signal attenuation or noise.
  • Bending causes impedance changesDuring high-frequency signal transmission, bending may alter the characteristic impedance of the cable.
• PerformanceData transmission errors, device malfunctions, image distortion, etc.
• Solution：
  • Use twisted pair or coaxial cables to reduce interference.
  • Ensure that the shielding layer is continuous and well grounded (such as a 360 ° shielding structure).
  • Choose specialized signal cables with low attenuation and high shielding efficiency.

4. Aging or breakdown of insulation layer

• reason：
  • OvervoltageLong term overload operation leads to insulation layer heating and aging.
  • mechanical damageBending or friction can damage the insulation layer, causing partial discharge.
  • Ambient HumidityThe humid environment leads to a decrease in insulation resistance and even short circuits.
• PerformanceLeakage, short circuit, equipment burnout.
• Solution：
  • Choose insulation materials that are resistant to high temperatures and voltages (such as XLPE, silicone rubber).
  • Increase the thickness of the insulation layer or use a multi-layer insulation structure.
  • Regularly check the insulation resistance to avoid use in humid environments.

5. Cable twisting or knotting

• reason：
  • Inconsistent direction of drag chain movementNot synchronized when moving up, down, left, or right.
  • The cable is too long or too shortLength mismatch leads to distortion.
  • Uneven installation tensionLoose cable fixing points or excessive tension.
• PerformanceCable entanglement, movement obstruction, and even breakage.
• Solution：
  • Optimize the motion trajectory of the drag chain to ensure consistent direction.
  • Accurately calculate the cable length based on the drag chain travel (usually leaving a margin of 10% -15%).
  • Use guiding devices or separators to fix the cable position.

6. Loose or detached joints

• reason：
  • Frequent vibrationVibration during equipment operation causes loose joints.
  • Connector design defectsInsufficient contact area or unreliable locking mechanism.
  • environmental pollutionOil and dust enter the interior of the joint.
• PerformancePoor contact, overheating, signal interruption.
• Solution：
  • Choose industrial grade connectors that are vibration resistant and dust-proof (such as M12 and M23 circular connectors).
  • Regularly inspect and tighten the joints, using thread locking agents.
  • Avoid direct exposure of joints in harsh environments.

7. Poor temperature adaptability

• reason：
  • Improper material selectionOrdinary cables become brittle at low temperatures and soften at high temperatures.
  • Poor heat dissipationThe dense arrangement of cables causes local overheating.
• PerformanceAt low temperatures, the cable becomes stiff and unable to bend, while at high temperatures, the sheath melts or adheres.
• Solution：
  • Choose a temperature range based on the working environment (such as -40 ℃ to+105 ℃).
  • Use low smoke halogen-free (LSZH) materials to meet fire safety requirements.
  • Optimize the internal layout of the drag chain to avoid cable stacking.