The stranding technology supports the stranding of jelly-loaded along with Tape Former designs. Stranding can be carried out possibly as a stand-alone process or tandemized with the jacketing procedure. Sophisticated new technological options like torsion shaft lay-plate SZ stranding devices, double go across binders with the adequate line control system permit a managed stranding process. Each solitary stranding disc is separately driven via a timing belt without having intermediate gear.
The stranding process ensures in most circumstances low stranding stress change, precise and steady set duration and continuous binding stress.
SZ Stranding is the process of twisting Pipes or Cables into a cable framework below managed conditions. The tubes/wires are guided through a series of rotating discs. The disks will spin until up to 14 transforms in one path is accomplished. The discs then change and twist the tube/cables approximately 14 turns in the opposing direction. Because of this SZ stranding motion, the pay-away reels or even the take-up do not have to spin in order to produce a cable and also this leads to higher line speeds. The pipes /cables are kept in place after SZ stranding with a polyester or even a comparable binder material.
The Tensor ‘EXCEL STRAND’ SZ Stranding line has become developed right after several years of experience supplying stranding lines all over the world. We stay on the cutting edge of technologies making use of the newest electronics, pushes and motor combos to accomplish repeatable and dependable performance. The SZ Stranding line can be configured in numerous different ways based on the customer needs. Some stranding lines have 6 pay out-offs while other lines have 24 or maybe more pay-offs. Other peripheral equipment could be included in the SZ Stranding line such as water blocking gel or tape, aramid yarn servers and in some cases even an extruder. Each line is custom made dependant upon the customer requirements and creativity.
A system and method for determining the set length of S-Z stuck barrier pipes through the manufacturing process of a fiber optic cable without reducing the production process. Pictures of your S-Z stuck barrier tube are grabbed with a camera. The photos are sent from your camera to a computer work station. The pc work station shows the pictures used with all the camera and executes coding components that calculate the set entire S-Z stranded buffer pipe throughout the manufacturing procedure for the cable. Input devices for instance a mouse and a keyboard may be used in conjunction with the procedures of the personal computer work station. By calculating the set duration throughout cable produce, efficiency might be maintained while ensuring that the stranding of Optical Fiber Coloring Machine does not fall out of tolerance, which might lead to deleterious twisting anxiety of visual fibers inside the buffer pipes.
The present invention concerns visual fiber cables which have barrier pipes organized in S-Z strands, and then in specific a technique of identifying the lay duration of such S-Z strands through the production procedure.In telecom wires, visual fibers or optical fiber ribbons are frequently used as being a method to transmit optical signals. These wires frequently have a central power fellow member, for instance a steel rod or stranded steel cables, that extends longitudinally along the central axis in the cable. As shown in FIG. 1 (from U.S. Patent No. 5,229,851, which can be incorporated by guide), central power fellow member 2 is intended to endure and avoid any tensile or compressive pressure used axially for the cable 1. The main power member 2 is frequently encircled by way of a covering 3, which might function as a padding material. A plurality of plastic buffer pipes 4-8 surround covering 3 and freely home protect optical fibers or ribbons inside them.
A binder thread or threads 17 and 18 are frequently contra helically applied around barrier tubes 4-8 to keep them in position. A water swellable tape (not shown) might be applied on the barrier tubes to block water ingress to the cable. A general plastic material coat 20 then addresses the contents of visual fiber cable 1. When the designed installation for cable 1 requires extra mechanical strength, the cable may include additional power members by means of armour or power yarns 19 placed intermediate the water swellable tape as well as the jacket.As demonstrated in FIG. 1, buffer pipes 4-8 are generally covered about central strength member 2 within a reverse helix or “S-Z” style. The places in which the stranded tubes reverse path (e.g. from an “S” to your “Z”) are known as reversal factors. S-Z stranding of buffer tubes generally speaking, and also the reversal factors specifically, are beneficial for accessing the cable midspan. Which is, due to the S-Z stranding, one or maybe more optical fibers in the cable could be “tapped” at the reversal points while not having to sever the cable or to handle major reconfiguration. The S-Z stranding offers adequate excess of pipe duration to create the tap easy by opening along side it from the cable with a point together its duration without having dropping the preferred slack inside the ribbon models or optical fibers in the pipe that is certainly opened up.
Thus, faucets in an S-Z stranded cable can be produced without having interrupting other tubes or ribbon models.To ensure the optical fibers inside the barrier tubes usually are not exposed to twisting stress, which may result in unwanted attenuation, a parameter of the S-Z stranded buffer pipes called “lay duration” has to be monitored. Bending stress is a loss mechanism in visual fibers that could happen when the cable is subjected to tensile causes, either from installation or temperature, or compression forces. Bending stress could cause signal loss in the optical fibers. The S-Z strand of barrier pipes within an optical fiber cable usually takes several types. Each ‘S’ transform might be followed immediately by way of a reversal to some ‘Z’ stranding path. Alternatively, there might be a number of helical turns among reversals. Generally, then, the typical lay duration is based on the space between reversal points split by the amount of transforms among reversals.The actual set length of every person S-Z stranded pipe will be different from the typical lay length with a small amount due to extra twisting and processing conditions. That is certainly, the lay duration of any given pipe, may be more or less than the typical lay duration, as a provided pipe may make over a entire variety of transforms among reversals. As an example, within a cable with 6 different coloured buffer pipes, one being red-colored, and all of S-Z stuck about a central member, the red tube could be at the very top or in the 12o’clock place on the cable on the initially reversal point.
But in the following reversal stage the red tube might be at the 6 o’clock position on the cable, 3 tubes taken off the 12 o’clock position. Thus, the red tube went one fifty percent turn much more between reversals. This half-transform should be included in the lay length calculation for the best precision. Thus, the actual set duration of a particular S-Z stuck Optical Fiber Coloring Machine is comprised of several elements and can be calculated to close approximation by:Set Length = D/N,where:N = N’ n/T where D will be the axial distance in between the reversal factors, N is the quantity of transforms between reversals, and N’ is the amount of whole turns in between the reversal points; n is the amount of tubes which a provided tube is counteract from its angular position in the previous reversal point, measured in the direction of rotation; and T is definitely the complete number of buffer tubes.To protect towards bending stress in the optical fibers, the lay length of the S-Z stuck buffer pipes is checked on completed cable to verify that this lay duration is within acceptable specs. The only method to look at the lay duration on completed wires would be to strip back the coat as well as other layers in the cable over the barrier tubes. It is not adequate to get this done on the cable ends since the begin-up and complete in the stranding procedure could have been done at issues that vary from the remainder of the cable. Rather, set length has zzgjup calculated personally through the manufacturing procedure after stranding. The line owner will make the duration way of measuring whilst strolling alongside the advancing cable, that was reasonably easy to achieve precisely simply because line rates of speed had been slow. Recently, nevertheless, line rates of speed have increased dramatically, creating this sort of handbook measurement inaccurate. One alternative is to quit the line periodically to consider dimensions.