What Are Some Possible Causes Of Uneven Cut Surfaces? How Can They Be Resolved?

Uneven fiber optic end faces fiber is a common problem before fiber optic splicing, which may be caused by blade condition, operation technique, fiber fixation, environmental factors or equipment malfunction. The specific causes and corresponding solutions are as follows:
I. Abnormal Blade Condition.
* Aging or wear of blades
* Cause: When blade edge becomes dull or partially worn, the fiber cannot be cut off at once, resulting in burrs, debris or tip of the end.
:: Symptoms: rough end of cut fibres, visible debris or uneven reflection.
:: Solutions:
Rotate the blade to a new cutting edge (if the device supports automatic blade rotation, the rotation function is directly triggered);
Replace the new blade (diamond or high-hardness alloy is recommended for longer service life);
Check regularly for abrasion marks on the blades (some have scales on the surface and are replaced when scratched).
* Blade Installation Misalignment
* Reason: The blade is not screwed tight or installed at the wrong angle, resulting in the blade not beingperpendicular to the fiber axis when cutting.
* Symptoms: End-face angle (angle deviation greater than 0.5°) significantly increases splicing loss.
Solutions:
1. **Improper Operation:**
Reinstall the blade, making sure the screw is tight and the blade is parallel to the clamp.
2. **Uneven Pressure:**
Reason: The lever presses too fast or too hard, causing the blade to bounce, causing ripples on the cutting surface.
3. **Symptoms:** There are local depressions or bulges at the end and bubbles at the fused joints.
4. **Solution:** Press the operating lever evenly (approximately 1-2 seconds to complete the cut) to avoid sudden force.
V. ** Choose devices with automatic bounce to reduce human intervention.
6. **Incomplete Fiber Fixation:**
The reason: the fiber is not centered or the clamp is not locked, causing the fiber to slide during cutting process, causing the end to tilt.
7. **Symptoms:** End-point Angle > 1°; splice loss > 0.1dB.
8. **Solution:** Before cutting, check that the fiber is placed directly in a V-slot and secured with a fixture.
9. ** It is best to choose a fixture with a non-slip design (such as rubber clamps or magnetic fixation). III. Fiber Optic Fixation Issues
* **Clamp Contamination or damage _ **
* **Cause:** Dust or coating fragments can cause fiber dislocations in V-grooves or fixtures.
**Symptoms:** Irregular notches or cracks on the end surface.
* **Solution:** Clean the inside of the fixture with an alcohol swab to ensure there are no impurities in the fixture.
* ** Check fixtures regularly for wear and tear and replace ageing parts in a timely manner.
* **Insufficient Fiber Stripping Length**
* ** Reason:** The length of the fiber is too short after stripping, leaving some coating residue in cutting process that affects the flatness of the end surface.
* **Symptoms:** Black residue on the edge of the end face, loss of joint strength after splicing.
* **Solution:** Ensure that the stripping length is 2-3mm longer than the fixture length (1213mm if the fixture length is 10mm);
* **Use special wire strippers to avoid damaging fibers.
IV. INTRODUCTION Environmental Factors
* * _Low temperature Causing Fiber Embrittlement _ **
** Reason:** When the ambient temperature is less than 10 degrees Celsius, the fibers become brittle, easily shredding the end surface when cut.
**Symptoms:** Large amounts of debris appear on the end, creating "snowflake" cracks.
Solutions:
operate at room temperature (or preheat fibers);
Choose devices with cryogenic protection (for example, some models have built-in heating modules).
High humidity creates static electricity;
The reason: When air humidity is greater than 80%, dust tends to stick to the surface of the fiber, creating static electricity when cut, causing debris to stick.
Symptoms: Small particles on the end, large loss fluctuation after splicing.
Solution: Work in a dry environment (or use a dehumidifier)
Rub with an antistatic cloth before cutting.
V. Equipment Failure
Loose mechanical structure
Reason: after long-term use, lever, spring and other components may loosen, causing blade movement instability.
Symptoms: Intermittent, irregular end cuts.
Solution: Contact manufacturer to repair, tighten or replace loose parts;
Periodic maintenance of equipment (e.g. mechanical structure inspection every 3 months).
Insufficient blade pressure
The reason: Aging of the internal spring weakens the blade's downward pressure.
Symptoms: Fibre cannot be cut and ends are "caudal."
Solution: Replace springs or adjust pressure screw (see equipment manual); select devices with pressure adjustment function (some high-end models support custom pressure values).
Summary Recommendations:
Daily maintenance: cleaning blade and fixture before each cut, checking end quality after cutting;
Operating Procedures: press the operating lever at an even speed to ensure the fiber is completely fixed.
Environmental control: avoid operating in low temperature, high humidity and dusty environment;
Periodically correct: Check the condition of the blade after every 1000 cuts and replace or adjust it if necessary.
Through the systematic detection of the above factors, the smoothness of cutting end can be improved, splice loss can be controlled below 0.05dB, and the steady operation of optical fiber network can be ensured.