If your fibres aren’t fusing properly in your fusion splicer, you’re not alone. This frustrating issue can stem from several factors, but don’t worry, it’s usually something you can fix. Common causes include incorrect settings, dirty equipment, or even damaged fibres. Understanding what might be going wrong and how to address it can save you time and ensure your splicing job is completed successfully. 

Let’s take a closer look at some possible reasons your fusion splicer isn’t doing its job and how to troubleshoot them. 

 

Dirty Fibre or Splice Plate 

A dirty fibre or splice plate can easily interfere with the fusion process. Even a tiny speck of dust or oil on the fibre end or the electrodes could prevent a proper connection. Before starting a splice, ensure both ends of the fibre are clean using proper cleaning tools. A fibre optic cleaning kit can make this job much easier. Don’t forget to clean the splice plate too. 

Incorrect Cleaving 

The cleaving process is crucial in fibre splicing. If your fibre isn’t cleaved properly, meaning the ends are not perfectly flat and smooth, it’s nearly impossible for them to fuse. Make sure to use the cleaver correctly, and double-check the fibre’s cleave quality before splicing. If you’re new to fibre cleaving, practice makes perfect! 

Improper Settings on the Fusion Splicer 

Fusion splicers have various settings depending on the fibre type and splice mode. If your machine is set to the wrong parameters for the fibre you’re using, it might not fuse correctly. Refer to your splicer’s manual to adjust the settings according to your specific fibre type. Keep in mind, different splicers may have different defaults, so this step can vary between models. 

Damaged Fibre 

Sometimes, the issue is more serious: a fibre may be physically damaged. Even slight bends, cracks, or nicks in the fibre can cause poor fusion. Inspect the fibre thoroughly before splicing. If it’s damaged beyond repair, replace the fibre before proceeding. 
 

Issues with the Splicer Electrodes 

If the electrodes on your fusion splicer are dirty or worn, they may not deliver the necessary heat to fuse the fibres. This is one of those problems you’ll only catch by giving your splicer regular maintenance. Cleaning the electrodes or replacing them, when necessary, can help avoid this issue. 

Inconsistent Fusion Time or Arc Settings 

The amount of time the splicer spends fusing the fibres can also impact the result. Too short of an arc time or incorrect arc settings can lead to incomplete fusions. On the other hand, too much heat could burn the fibres. It’s a delicate balance, and it’s important to adjust these settings based on the fibre specifications. 

Fibre Alignment Issues 

Alignment is critical in fibre splicing. If the fibres aren’t aligned perfectly, they won’t fuse properly. Ensure that the fibres are properly positioned in the fusion splicer. Many modern fusion splicers have automated alignment systems, but if you’re using an older model, you may need to do this manually. Use alignment v-grooves and precision tools to help achieve perfect fibre alignment. 
 

 

FAQs 

How can I tell if my fibre is cleaved correctly? 

A good cleave should leave the fibre end smooth and flat. You can test the cleave by visually inspecting it with a magnifying glass or microscope. The fibre ends should be at a 90-degree angle to ensure proper alignment for fusion. 

What’s the best way to clean fibre before splicing? 

Use lint-free wipes and isopropyl alcohol to clean the fibre ends. Avoid touching the fibre with your fingers, as oils from your skin can interfere with the splice. 

How often should I maintain my fusion splicer? 

Regular maintenance is essential for optimal performance. Clean the electrodes and check the arc calibration monthly, or more often if you use your fusion splicer frequently. 

Why is my splicer showing error codes? 

Error codes typically indicate issues such as alignment problems, fibre misplacement, or settings errors. Refer to your splicer’s manual for troubleshooting specific error codes. 

Can I rent a fusion splicer for my projects? 

Yes, if you don’t use a fusion splicer regularly, consider renting one from CMW Ltd. Renting gives you access to high-quality equipment without the upfront cost, and you can always choose the right model for your job.

What’s the Next Step? 

A fusion splicer not fusing properly is a problem that can often be resolved with a bit of troubleshooting. By carefully inspecting your fibre, cleaning your splicer, and adjusting settings, you can avoid these headaches and achieve flawless splices. And if you’re still having issues, it might be time to call in the experts.