How to use a fiber optic patch cord polishing machine

Using a fiber optic patch cord polishing machine involves careful setup, adjustment of pressure, speed, and time, sequential polishing with appropriate films, and thorough inspection to ensure high-quality fiber endfaces.PreparationClean Environment: Work in a dust-free, clean room to prevent contamination during polishing and inspection .Ferrule Preparation: After curing the ferrule, allow it to cool using a fan for about five minutes before handling .Fiber Cleaving: Hold the connector in your left hand, align the fiber with a fiber cutter in your right hand, and gently break the fiber to the correct length .Machine SetupPower On: Turn on the polishing machine and ensure all safety switches are functional .Adjust Parameters:Pressure: Move the four-corner pressure column to the required setting while the machine is off .Time: Set the timer for the desired polishing duration .Speed: Press start, observe the speed display, adjust the speed control knob, and lock it once the desired speed is reached .Polishing Jig: Secure the connector in the polishing jig, ensuring the ferrule is properly exposed and aligned .Polishing ProcedurePolishing Films: Use a sequence of lapping films with decreasing grit sizes, typically 30µm → 9µm → 3µm → 1µm. Advanced finishes may use ADS films .Initial Polishing: Start with a coarse film (e.g., Silicon Carbide) on a rubber pad, applying minimal hand pressure and a few rotations to even out fiber protrusion .Machine Polishing: Move to the machine for subsequent polishing steps, ensuring the jig is secured and the pad is properly lubricated with water or polish oil .Angle Polishing: For APC connectors, ensure the 8° angle is correctly formed; repeat polishing if necessary .Post-PolishingCleaning: After each step, clean the ferrule and polishing film with distilled water or 99% isopropyl alcohol and lint-free wipes .Inspection: Use a fiber inspection microscope (200X–400X) to check for scratches, dirt, or defects. For MPO/MTP connectors, an interferometer may be used to verify geometry .Drying: Use compressed air to remove any remaining water vapor from the connector .Safety and PrecautionsAlways adjust pressure, speed, and time before starting to avoid damaging the polishing film or fiber .In case of emergency, press the emergency stop switch and reset it by turning clockwise .Different connector types (SC, LC, FC, ST, APC, UPC) require specific polishing parameters .Maintain a clean, dust-free environment throughout the process to ensure optimal optical performance . Following these steps ensures low insertion loss, high return loss, and long service life for fiber optic patch cords.