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Quick Troubleshooting Checklist for Common APC Polishing Issues

Published: April 11, 2019
, Last updated: September 18, 2025

Whether you’re using step ferrules or conical ferrules, you may have problems achieving consistent results for the 4 basic geometric characteristics – Radius, Angle/Apex, and Key Error – that are relevant to the APC polishing process. The following paragraphs offer troubleshooting tips to overcome common polishing issues.

Equipment checks:

  • Rubber pads – If the pads are more than 6 months old, they may show uneven wear. This wear will negatively affect Radius and Apex/Angle results. The replacement schedule is dependent upon use. It is best determined by monitoring Radius and Apex statistics, and replacing rubber pads when values approach control limits. For time-based replacement schedules, I’d recommend every 6 months for moderate-to-heavy use and no longer than 1 year for low-to-moderate use.
  • The fixture – Holes in the fixture will wear out over time (generally 3 to 5 years), which can impact parameters (mostly Angle/Apex). Pin gauges can be used to monitor hole diameters, but since wear is often not symmetrical, it’s difficult to quantify hole roundness/ovality. Often, the best way to verify that hole-wear is still acceptable is to return the plate to the manufacturer for measurement or try a new “loaner” fixture and see if the results improve significantly.
  • Plastic clips in the polishing fixture – These can wear out or break and should be replaced periodically. Also, operators should always ensure connectors click into place properly.

READ THE FULL BLOG ARTICLE HERE: Steps to Overcome Common APC Polishing Issues

 

Additional resources from the FOC team include:

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FOC Tips Fiber Optic Center has a team of technical experts and marketing strategists with decades of years in the field. This team contributes to the fiber, cable and specialty industries coverage through news, alerts, reports and general media information.
About Fiber Optic Center, Inc.
Fiber Optic Center, Inc., (FOC), is an international leader in distributing fiber optic components, equipment, materials, and supplies known for helping customers make the best cable assemblies in the world for over three decades. Material property consultation is provided by technical experts for lapping film, epoxy, adhesives, optical coatings, and optical plastics during application specific material selection. Technical process expertise is offered in several key technology areas. Specialized expertise includes cable assembly line mastery, fiber broadband field installation best practices, and technical advancements in telecom, datacom, data centers, and hyperscale. Optical cable specification development includes design and quality testing. FOC's impact reaches the network physical capabilities through fiber manufacturing process expertise from preform fabrication and shaping, fiber drawing, and coating requirements for double clad fibers used for high power fiber laser applications to solution doping, vapor phase doping, rare earth chelates and halide recipe consultation. Fiber Optic Center is the preferred choice for the world’s fiber professionals as the industry connection to the most innovative optical products, technologies and technical experts who integrate their manufacturing knowledge and vast experience into customers' worldwide operations. @FiberOpticCntr

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