Contamination on the fixture prevents ferrules from protruding equal distance from the base of the fixture.
This mainly applies to fixtures for polishing ferrule only (as opposed to connector polishing). The ferrules must protrude the same amount from the bottom of the fiber optic polishing fixture, to ensure consistent pressure being applied to all ferrules.
Contamination at the top of the bore, where the ferrule flange sits on, will cause the ferrules to sit higher and protrude less. If ferrules are protruding different length from the bottom of the fixture, this results in unequal pressures being applied to the ferrules during polishing, again resulting in variation in Radius values, FH values, and fiber end-face polish quality (scratches).
Additional resources from the FOC team include:
- Glossary, Acronyms, Military Specifications for Connectors: http://bit.ly/2a2EFn8
- Q&A Resource: email technical questions to AskFOC@focenter.com
- Contact FOC with questions at: (800) 473-4237 / 508-992-6464 or email: firstname.lastname@example.org
- FOC Tips: considerations regarding freezing epoxy – extending the epoxy’s pot life and saving money - June 18, 2019
- Fiber Optic Center AskFOC: do you have epoxy information in the form of a matrix? - June 17, 2019
- FOC Tips: to investigate core cracking issues and identify the cause - June 13, 2019
- Fiber Optic Center AskFOC: how much water should we use when polishing? - June 12, 2019
- Fiber Optic Center AskFOC: Can you give more detail about the bend test? - June 11, 2019
- FOC Tips: the “golden rule” in stripping - June 11, 2019
- Fiber Optic Center AskFOC: why do we need to consider the Tg when selecting an epoxy? - June 10, 2019
- The Best Laid Plans of Mountains and Men: Crocker Mountain - June 10, 2019
- FOC Tips: Troubleshooting tips specific to Angle and Apex Offset - June 7, 2019
- Fiber Optic Center AskFOC: what are the most common issues regarding APC polishing geometry? - June 6, 2019