How to cut the optical fiber of a Sick sensor

Cutting a SICK sensor optical fiber is generally not recommended, but if necessary, it must be done carefully using proper fiber optic tools to avoid damage.

Important Considerations

SICK sensors, such as the OD7000 or WLL80, use specialized multimode optical fibers with a duplex glass core, aramid strand sheath, metal protection, and low-halogen outer jacket . These fibers are pre-terminated with connectors at both ends (metal bayonet at the sensor, plastic locking at the controller) and are optimized for signal transmission. Cutting the fiber can compromise signal quality and may void warranties .

Recommended Procedure if Cutting is Necessary

1. Disconnect the Fiber Properly
   • Remove the fiber from the sensor by twisting the bayonet connector counterclockwise .
   • Release the locking sleeve at the controller end before pulling out the fiber to avoid damage .
2. Use Proper Fiber Optic Tools
   • Use a fiber optic cleaver or precision cutting tool designed for glass fibers.
   • Avoid using scissors or knives, as these can crush or splinter the fiber, leading to signal loss.
3. Prepare the Fiber End
   • After cutting, strip the outer jacket carefully without damaging the glass core.
   • Clean the fiber tip with isopropyl alcohol and a lint-free wipe to remove debris.
4. Terminate or Reconnect
   • If the fiber needs to be reconnected, use a compatible connector or fusion/splice kit.
   • Ensure the fiber is aligned correctly in the connector to maintain signal integrity.

Safety Precautions

• Do not look directly into the fiber when the sensor is powered; laser light can damage eyes.
• Wear safety glasses when cutting or handling the fiber.
• Avoid bending the fiber sharply, as this can break the glass core or reduce transmission efficiency.

Alternative Approach

Instead of cutting, consider ordering a custom-length fiber from SICK or using the supplied 3-meter fiber and routing it appropriately . This preserves warranty and ensures optimal sensor performance. By following these steps and using proper tools, you can safely modify the fiber while minimizing the risk of damage to the sensor or controller.