Jameson Tools

A fiber blowing machine is used to install fiber optic cable by connecting to a duct system and using compressed air to push the cable through. This process has some advantages over the pulling technique, because it puts less strain on the fiber (which can reduce the chance for damage during installation).

The first step in using a fiber blowing machine is to verify duct integrity. You can find any damage or leaks by pressurizing the area and checking for air loss. Use a mandrel to check the duct for any obstructions, which will make sure you have a clear pathway for the cable to travel. Once you have verified the duct’s suitability for installation, you should perform a “crash test” with the fiber blower. You can use a scrap piece of duct and plug to simulate an obstruction in the system. This will make sure the force of the air pressure doesn’t exceed the fiber’s compression capability.

Once you’re ready to install the fiber, attach a cable grip at the end of the line, which will have a swivel and carrier or parachute. You will also need to apply a silicone lubricant directly to the duct opening. After you feed the cable through the tractor drive and air block, you should add more behind the carrier. Once the fiber is in position, the compressed air will be fed into the duct system. When the pressure equalizes, the air will find the “path of least resistance” by applying a push force to the cable carrier. The moving carrier will pull on the cable as it travels through the duct.

Most people think about eye damage when it comes to safety in fiber optic installation because of the laser light traveling inside the fiber, but there are other hazards of which you should be aware. The broken ends of fibers and scraps created from the splicing process can be extremely dangerous. The ends are very sharp, so they can easily penetrate your skin. They can break off without your knowledge. They can also be hard to find and remove. Sometimes, a pair of tweezers and a magnifying glass will get them out. But most of the time, you will have to wait until the area gets infected so they can work themselves out.

Peel the small slit section of the tube away and cut both ends. Remove the fibers from what’s left of the split section on the tube. Cut the removed part of the central tube at both ends and discard it. The optical fibers are now exposed and ready for termination.