Servo Cable Encoder Cable Sensor Cable CNC Cable

Servo cables are critical components in modern industrial automation, robotics, and CNC machinery. Their primary function is to provide a robust and interference-free connection for the high-performance communication required between a servo drive (the controller) and a servo motor (the actuator).

1. (Core Construction & Design)

A typical servo cable is a composite cable that integrates several key elements into one jacket:

• Power Conductors: Thick gauge wires that carry the high electrical current needed to power the servo motor.

• Feedback Conductors: Fine, twisted-pair wires for transmitting sensitive encoder signals (e.g., EnDat, Hiperface) that provide real-time position, speed, and torque feedback to the drive.

• Brake Conductors (Optional): Separate wires to control an optional electromagnetic brake on the motor.

• Overall Shielding: A high-coverage braided shield (often tinned copper) surrounds the entire cable core to protect against Electromagnetic Interference (EMI) and Radio Frequency Interference (RFI), which is crucial for signal integrity.

• Individual Pair Shielding (Common): Each feedback twisted pair may have its own foil shield to prevent cross-talk between signals.

• Specialized Jacket: The outer jacket is made from durable, flexible materials like PVC, PUR, or TPE that resist oil, abrasion, and sometimes flames (e.g., UL/CSA listed).

2. (Key Performance Characteristics)

• High Flexibility & Torsion Resistance: Designed for use in cable carriers (e.g., drag chains) and applications with twisting motions. They undergo millions of flexing cycles without failure.

• Excellent EMI Shielding Effectiveness: Ensures that the critical feedback signals are not distorted by noise from motors, welders, or other equipment, which is essential for precise positioning.

• Durability in Harsh Environments: Jacket materials are chosen to withstand exposure to oils, coolants, chemicals, and wide temperature ranges.

3. (Applications)

Servo cables are used wherever precise motion is required:

• Industrial Robots and Robot Arms

• CNC Machining Centers, Lathes, and Milling Machines

• Packaging Machinery

• Printing Presses

• Automated Assembly Lines

• Material Handling Systems