The stranding technology supports the stranding of jelly-filled as well as FTTH Cable Production Line styles. Stranding can be done possibly as being a stand-alone process or tandemized with the jacketing process. Sophisticated new technical solutions like torsion shaft lay-dish SZ stranding machines, double go across binders with the adequate line manage system enable a managed stranding process. Every single stranding disc is separately powered via a timing buckle without intermediate gear.

The stranding process ensures in most conditions low stranding stress fluctuation, accurate and stable lay duration and continuous binding tension.

SZ Stranding is the procedure of twisting Pipes or Cables right into a cable framework below managed conditions. The tubes/cables are carefully guided via a number of revolving discs. The disks will rotate until up to 14 turns in one direction is accomplished. The discs then change and twist the tube/cables up to 14 turns in the opposing direction. Due to this SZ stranding motion, the pay out-off reels or even the take-up do not have to rotate in order to produce a cable which brings about high line speeds. The tubes /wires are locked in location after SZ stranding with a polyester or a similar binder materials.

The Tensor ‘EXCEL STRAND’ SZ Stranding line has been developed after years of encounter supplying stranding lines around the world. We remain the cutting edge of technologies utilizing the newest electronics, pushes and motor combinations to achieve repeatable and dependable performance. The SZ Stranding line could be set up in numerous different methods depending on the customer needs. Some stranding outlines have 6 pay out-offs whilst other lines have 24 or maybe more pay out-offs. Other peripheral gear could be included in the SZ Stranding line like water obstructing gel or adhesive tape, aramid yarn web servers and in some cases even an extruder. Each line is custom made dependant upon the customer needs and imagination.

A system and way of identifying the set period of S-Z stranded buffer pipes during the production process of a fiber optic cable without reducing the production process. Images of the S-Z stranded barrier pipe are grabbed with a digital camera. The pictures are delivered from your digital camera to some computer workstation. The computer workstation shows the photos used with all the camera and executes programming components that calculate the set entire S-Z stuck buffer tube through the manufacturing procedure for the cable. Enter devices such as a computer mouse and a key pad may be used in conjunction with the operations of the personal computer work station. By calculating the set length during cable manufacture, productivity may be maintained while making sure the stranding of FTTH Cable Production Line fails to fall out of tolerance, that might bring about deleterious twisting stress of optical fibers within the buffer tubes.

The present invention pertains to optical fiber wires which have barrier pipes arranged in S-Z strands, and in particular a way of determining the set duration of such S-Z strands during the production procedure.In telecommunication wires, optical fibers or visual fiber ribbons are often utilized as a medium to transmit optical impulses. These wires frequently have a main strength fellow member, such as a metal rod or stuck steel wires, that expands longitudinally across the central axis of the cable. As shown in FIG. 1 (from U.S. Patent No. 5,229,851, that is integrated by reference), central strength member 2 is designed to withstand and resist any tensile or compressive pressure applied axially to the cable 1. The central power fellow member 2 is frequently encircled by a covering 3, which might function as a cushioning materials. A plurality of plastic barrier pipes 4-8 encompass addressing 3 and loosely home safeguard visual fibers or ribbons within them.

A binder thread or threads 17 and 18 are often contra helically used about barrier pipes 4-8 to carry them in position. A water swellable tape (not shown) could be used over the buffer pipes to block water ingress in to the cable. An overall plastic material coat 20 then covers the contents of visual fiber cable 1. In the event the designed installation for cable 1 requires extra mechanical power, the cable might include extra strength associates by means of armour or strength yarns 19 positioned intermediate the water swellable adhesive tape and also the jacket.As demonstrated in FIG. 1, barrier tubes 4-8 are typically covered about central strength fellow member 2 in a reverse helix or “S-Z” style. The locations in which the stuck tubes reverse path (e.g. from an “S” to some “Z”) are called reversal factors. S-Z stranding of buffer tubes generally speaking, and also the reversal factors in particular, are beneficial for accessing the cable midspan. That is, as a result of S-Z stranding, one or more visual fibers in the cable may be “tapped” in the reversal factors without needing to sever the cable or to carry out major reconfiguration. The S-Z stranding offers sufficient excess of pipe length to help make the tap easy by opening up along side it from the cable with a point along its duration without having dropping the required slack within the ribbon units or visual fibers inside the tube which is opened.

Thus, taps inside an S-Z stuck cable can be made without interrupting other tubes or ribbon units.To ensure that the visual fibers within the buffer pipes are not exposed to bending stress, which can result in undesirable attenuation, a parameter in the S-Z stuck buffer tubes known as “set duration” has to be monitored. Bending stress is a loss mechanism in visual fibers that could occur in the event the cable is exposed to tensile causes, possibly from installation or temperature, or compression causes. Twisting stress may cause transmission loss in the visual fibers. The S-Z strand of buffer pipes within an visual fiber cable usually takes a number of forms. Every ‘S’ transform might be followed immediately with a reversal to some ‘Z’ stranding direction. Alternatively, there might be several helical turns among reversals. Generally speaking, then, the normal set duration is based on the space between reversal points divided by the amount of turns between reversals.The actual set length of each individual S-Z stuck pipe will be different from your average lay duration with a little bit because of extra twisting and processing problems. That is certainly, the set period of virtually any pipe, could be pretty much compared to average set length, being a provided pipe could make greater than a entire quantity of turns between reversals. For instance, inside a cable with 6 different colored buffer pipes, one being red-colored, and all sorts of S-Z stranded about a main member, the red-colored tube may be at the very top or in the 12o’clock place around the cable in the first reversal stage.

But at the following reversal point the red-colored tube could be in the 6 o’clock position on the cable, 3 tubes taken from the 12 o’clock place. Thus, the red-colored pipe went one half turn more between reversals. This fifty percent-transform should be within the set length computation for the most accuracy. Therefore, the actual set duration of a given S-Z stranded Fiber Coloring Machine includes several elements and can be determined to seal approximation by:Set Length = D/N,in which:N = N’ n/T in which D will be the axial range between the reversal points, N is the quantity of turns among reversals, and N’ is the quantity of entire turns involving the reversal factors; n is the number of tubes which a provided tube is counteract from its angular place in the earlier reversal point, counted toward rotation; and T is definitely the total variety of barrier pipes.To safeguard towards bending anxiety in the optical fibers, the set length of the S-Z stranded buffer pipes is checked on finished cable to ensure that this lay duration is within appropriate specifications. The only way to look into the lay length on completed cables is always to strip back again the coat as well as other levels within the cable over the barrier pipes. It is not sufficient to get this done on the cable ends as the start-up and finish of the stranding procedure may have been done at issues that differ from all of those other cable. Rather, set length has zzgjup calculated personally through the production process right after stranding. The line owner would make the length way of measuring while walking together with the progressing cable, which was reasonably easy to complete accurately because line rates of speed had been slow. Recently, nevertheless, line rates of speed have increased significantly, making this sort of manual measurement incorrect. One option is to stop the line periodically to adopt dimensions.

Optical Fiber Coloring Machine – Consider This..