MXPA01006707A - System and methods for automatically adjusting turnaround position in spool winders - Google Patents

System and methods for automatically adjusting turnaround position in spool winders

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Publication number
MXPA01006707A
MXPA01006707A MXPA/A/2001/006707A MXPA01006707A MXPA01006707A MX PA01006707 A MXPA01006707 A MX PA01006707A MX PA01006707 A MXPA01006707 A MX PA01006707A MX PA01006707 A MXPA01006707 A MX PA01006707A
Authority
MX
Mexico
Prior art keywords
flange
fiber
recirculation
spool
adjustment
Prior art date
Application number
MXPA/A/2001/006707A
Other languages
Spanish (es)
Inventor
David A Bednarczyk
Mark S Tota
Thomas S Walton
Tyrone Reid
Original Assignee
Corning Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Corning Incorporated filed Critical Corning Incorporated
Publication of MXPA01006707A publication Critical patent/MXPA01006707A/en

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Abstract

A system (10) for winding optical fiber (22) onto a spool (18) includes a spindle assembly (16) for receiving the spool (18) and rotating it around its longitudinal axis (36). A fiber source (14) for providing a continuous supply of fiber to the spool (18) is positioned relative to the spindle assembly (16) suchthat rotation of the spool (18) by the spindle assembly (16) causes fiber (22) to be wound onto the spool (18) around its longitudinal axis (36). A tension sensing device (24) senses and provides feedback related to the amount of tension in the fiber. A traverse means (20) causes the fiber to wind onto the spool (18) back and forth beween a front spool flange (34a) and a rear spool flange (34b), the traverse means (20) including a front turnaround position at the front spool flange (34a) and a rear turnaround position at the rear spool flange (34b). A controller (26) receives the fiber tension feedback and uses the feedback to determine what adjustment, if any, is to be made to the front and rear turnaround positions.

Description

/ SYSTEM AND METHODS FOR AUTOMATICALLY ADJUSTING RECIRCULATION POSITION IN REEL REELERS BACKGROUND OF THE INVENTION FIELD OF THE INVENTION The present invention relates generally to improvements in systems and methods for winding reel optical fiber and particularly, to advantageous aspects of a system and methods for controlling recirculation positions in reel flanges.
DESCRIPTION OF THE PREVIOUS TECHNIQUE In typical winding machines of the prior art, the optical fiber is wound on the drum of a spool rotating up and down its length between a pair of spool flanges. The control of the winding procedure has been a challenge for many years. One issue that has been particularly challenging is the control of the recirculation positions, that is, the point at each flange in which the transverse movement of the spool relative to the fiber is reversed. A recirculation should ideally occur at the point where the fiber has reached a flange. Therefore, the recirculation positions are commonly preset based on a standard size tension reel, with flanges of known thickness. However, due to the variability in spool manufacture, the recirculation position can not be precisely correct for a particular flange. If recirculation occurs too late, excess fiber can accumulate in the flange, resulting in what is called a "dog bone" condition. If the recirculation occurs too soon, a gap in the flange may result. Another condition that can arise if recirculation occurs too early, is a "waterfall" condition, in which the fiber is wound on the reel in a loop in the form of a non-uniform serpentine. Any of these conditions will cause the fiber to be irregularly wound on the flange. These error conditions are particularly significant in the manufacture of optical fiber, where an inadequate winding of the spool can have a detrimental effect on the performance of the fiber. The prior art systems typically provide only manual intervention by an operator to control reel recirculation points based on an observed flange or dog bone condition. However, this method is not advantageous for a number of reasons. First, it requires a number of recirculations for a bone condition for dog or flange space to be evident to the operator. Second, the adjustment of the recirculation position is imprecise and requires several additional recirculations to confirm that in fact the error condition has been corrected. These factors greatly reduce the efficiency of the winding process. Therefore, there is a need for an automatic system for adjusting the recirculation position on a spool flange on a winding machine.
BRIEF DESCRIPTION OF THE INVENTION A currently preferred embodiment of the invention provides a system for winding optical fiber on a reel. The system comprises a spindle assembly to receive the spool and rotate it about its longitudinal axis. A fiber source for providing a continuous supply of fiber to the spool is positioned relative to the spindle assembly, so that rotation of the spool by the spindle assembly causes the fiber to be wound on the spool about its longitudinal axis. A voltage sensing device detects and provides feedback in relation to the amount of tension in the fiber that is wound on the reel. A transverse means causes the fiber to be wound on the spool back and forth between a front spool flange and a rear spool flange, the transverse means includes a previous recirculation position on the front spool flange and a recirculation position back on the rear spool flange. The controller receives the fiber tension feedback and uses the feedback to determine which adjustment, if applicable, will be made for the previous and subsequent recirculation positions. Additional features and advantages of the present invention will become apparent with reference to the following detailed description and accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 shows a diagram of a currently preferred embodiment of a system according to the invention. Figure 2 shows a side view of a tensioning reel for use in a currently preferred embodiment of the invention. Figure 3 shows a partial cross-section of a partially wound tensor reel. Figure 4 shows a front view of a selection machine for use in a currently preferred embodiment of the invention. Figures 5A and 5B show, respectively, side and front views of a tension spindle assembly suitable for use in the selection machine shown in Figure 4. Figures 6A, 6B and 6C show, respectively, top, side and anterior views. of a cross assembly suitable for use in the selection machine shown in Figure 4.
Figures 7A and 7B show, respectively, side and front views of the tension spindle assembly shown in Figures 5A and 5B mounted on the transverse assembly shown in Figures 6A, 6B and 6C Figure 8 shows a rear view of a controller of microprocessor for use in a currently preferred embodiment of the invention. Figure 9 shows a diagram of the scale of possible positions taken from the oscillating arm in a currently preferred embodiment of the invention. Figure 10 shows a flow chart of a preferred embodiment of a method according to the invention. Figure 11 shows an alternative embodiment of a system according to the present invention.
DETAILED DESCRIPTION OF THE INVENTION A preferred embodiment of the invention provides a system and methods for winding fiber on a reel that automatically corrects reel variability and differences in transverse recirculation positions. The invention verifies the "flatness" of the fiber fold in both recirculation positions, since each refers to the mean point diameter of the reel and oscillating set point position. A system control circuit incorporates the change in reel diameter in a feedback oscillating control circuit, which in turn, provides the system controller with information that is necessary to correct each of the reel recirculation positions. , either by moving it towards or away from the respective flange in each subsequent step. Figure 1 shows a block diagram of the main components of a currently preferred embodiment of a system 10 according to the invention. The system 10 includes a volumetric screw assembly 12, in which a manufacturing volume reel 14, and a tension spindle assembly 16 on which a tension spool 18 is mounted, is mounted. The spindle assembly 16 is itself assembled in a transverse assembly 20, which moves the assembly 16 and thus, the tensioning spool 18, back and forth in a transverse direction as it is rotated. The optical fiber 22 is threaded from the volumetric reel to the tensioning spool via a tension sensor 24, which measures and provides as an output the tension of the fiber 22 which is wound on the tensioning spool 24. The spindle assembly volumetric 12, tensioner screw assembly 16 and transverse assembly 20 are controlled by a microprocessor controller 26, which includes programs and control programming systems 28. The programs and control programming systems comprise a pair of programmable limit switches 30a, 30b, whose operation is described in more detail below. In the currently preferred embodiment, the microprocessor controller comprises a PC control system based on VME Intel 80486, programmed in the computer language C.
Figure 2 shows a side view of a tension reel 18 for use in the presently preferred embodiment of the invention. The tensioning spool includes a cylindrical drum 32 around which the fiber 22 is wound. Tension reel 18 also includes a pair of flanges, a front flange 34a faces the operator of the machine when the reel is mounted on the tensioner screw assembly 16, and a rear flange 34b that faces the selection machine, away from the machine operator. When the tension spool 18 is mounted on the spindle assembly 16, the spindle assembly 16 rotates the spool about its longitudinal axis 36. The transverse assembly 20 causes the rotating spool to move back and forth along the length of the spool 16. its longitudinal axis 32. Guided by the microprocessor controller 26, the tension spool screw assembly 16 and the transverse tension spool assembly 20, combine to cause the fiber optic 22 to be wound on the tension spool 18 upwards and down the length of the drum 32 in a series of layers between the front and rear flanges 34a, 34b. The recirculation positions, that is, the point on each tension spool flange on which the transverse assembly causes the rotating tension spool to reverse the direction along its longitudinal axis, are determined by a pair of programmable limit switches (PLS) 34a, 34b in the programs and control programming systems 28, one for the anterior flange recirculation, and the second for the rear flange recirculation. Each programmable limit switch is detected and initiated as the longitudinal feed approaches the respective spool flange, at which point the controller initiates a recirculation sequence, or routine, that provides a digital cam profile that performs the following three functions: (1) detect the current transverse position; (2) starting a deceleration of the longitudinal advance towards a predetermined stop position; and (3) begin an acceleration of the longitudinal advance at a predetermined speed in the opposite direction. In the presently preferred embodiment of the invention, the recirculation positions in each flange are calculated by the controller 26 by adding a predetermined recirculation position and an adjustable flange displacement, which can be positive, zero, or negative: RECIRCULATION POSITION = CERTIFIED_RECIRCULATION_ POSITION_WATER_SWITCH These quantities are illustrated in Figure 2, where for the front flange 34a, the recirculation adjustment position is represented by the dotted line 38a, the flange displacement is represented by the distance 40a and the calculated recirculation position is represented by dotted line 42a. Similarly, for the rear flange 34b, the adjustment recirculation position is represented by the dotted line 38b, the Flange displacement is represented by the distance 40b and the calculated recirculation position is represented by the dotted line 42b. The predetermined recirculation positions 38a, 38b are based on the known width of the winding surface on the tension spool drum 32. Ideally, the predetermined recirculation positions will be sufficient to cause the optical fiber to adequately wind between the flanges 34a, 34b without the need to add a flange displacement 40a, 40b. Unfortunately, due to the variability in the manufacture of tension reels, the predetermined recirculation points for the transverse assembly may not be sufficient to allow the fiber to adequately wind up on the tension reel. Specifically, recirculation can occur too late in a flange, causing excess fiber to accumulate in that flange, or too early, causing a gap to form in that flange. The first condition is known as a "bone for a dog" and the second as a "flange space". These undesirable conditions are illustrated in Figure 3, which shows a partial cross section of a tensioning spool, rotated on its side. Figure 3 shows two layers of fiber that have been properly wound and two layers during the winding of which, recirculation has occurred at an inappropriate point. The left side of the drawing illustrates a bone condition for dog 22a and the right side, a flange space 22b. In addition to these two types of errors, there is also an error condition known as a "cascade", which is a non-uniform fiber serpentine loop. As well as a flange space, a cascade condition can occur when recirculation occurs very early on a flange. As described below, the present invention provides an advantageous method for automatically adjusting the flange recirculation to minimize the appearance of dog bones, flange spaces, and feedback-based cascades provided by the measured voltage of the optical fiber at each one of the two recirculations. Figure 4 shows a diagram of a selection machine 44 which is used in a currently preferred embodiment of the invention. The three main components of the machine are the volumetric reel spindle assembly 12, the tension spool screw assembly 16 and the transverse assembly 20, and the selection assembly 46 between the two reels. As shown in Figure 4, the optical fiber 22 is threaded through a series of pulleys, which create a path for the fiber through different stages of the selection process. Of particular interest for the present invention is an oscillating assembly 48, which provides the voltage sensor function 24 shown in Figure 1, and is used to measure the tension of the optical fiber 22 as it is wound on the tension reel 16. The oscillating assembly comprises a pulley 50 around which the fiber 22 is threaded, an oscillating arm 52 and a pivot frame 54. A brush DC motor (not shown) includes armature 54, which extends outside both ends of the DC motor. One end of the armature 54 is connected to the swing arm 52 and applies a constant torque to the swing arm 52 in a counterclockwise direction. The tension in the optical fiber 22 threaded through the pulley applies pressure torque to the oscillating arm in a clockwise direction. The torque applied by the DC motor balances the torque applied by the fiber optic voltage. During the initialization of the selection machine 44, an adjustment point position of the oscillating arm 52 is established, which is the oscillating arm position representing an optimal amount of tension in the optical fiber that is wound on the reel. In the currently preferred mode, the set point position is calibrated to be 90 degrees from the horizontal plane. However, it is possible to use any number of positions for the swing arm 52 as the set point position. The position of the oscillating arm 52 is detected by a suitable position sensing device. In the presently preferred embodiment of the invention, the position of the oscillating arm 52 is detected using a rotating variable differential transformer (RVDT). The RVDT is connected to the other end of the armature 54, which extends from the DC motor. In this way, one end of the armature 54 is connected to the swing arm 52, while the other end of the armature 54 is connected to the RVDT. When the oscillating arm 52 moves around the armature 54, the armature 54 is rotated. This rotation is detected by the RVDT, causing the RVDT to generate a voltage signal that bears a linear relationship to the amount of shaft rotation, and thus, to the amount of movement of the oscillating arm 52. In this way, the microprocessor controller 26 determines the position of the oscillating arm 52 by monitoring the RVDT voltage signal. The position of the oscillating arm is, of course, directly related to the amount of tension in the fiber that is wound on the reel. Each oscillating arm position corresponds to a different voltage level in the optical fiber 22. For the system shown in FIG. 4, when the tension of the fiber 22 falls below the optimum level, the oscillating arm 52 will oscillate away from the set point. oscillating in a counter-clockwise direction to a new position to the left of the set point, the new position indicates the lowest voltage level. When the tension of the fiber 22 rises above the optimum value, the oscillating arm 52 will oscillate away from the oscillating set point in a clockwise direction towards a new direction to the right of the set point, the new position indicates the highest voltage level. The tension of the fiber 22 is a function of a number of variables, which includes the diameter of the tensioning spool and the rotational speed of the spool. Figures 5A and 5B show, respectively, side and front views of a spindle assembly 16 suitable for use in the presently preferred embodiment of the invention. The spindle assembly 16 includes a spindle 56 on which the tension reel 18 is mounted, and a servomotor 58 for rotating the spool 18 about its longitudinal axis. Figures 6A, 6B and 6C show, respectively, top, side and anterior views of a transverse assembly 20 which is suitable for use in conjunction with the spindle assembly shown in Figures 5A and 5B to move the tensioning spool 18 back and forth. front along of its longitudinal axis as the spindle assembly 16 rotates the spool 18. The transverse assembly 20 includes a carriage 60 in which a spindle assembly 16 is mounted. The carriage 60 is mounted on a guide rail 62 defining the trajectory linear along which the spindle assembly 16 is moved. The transverse assembly 20 includes a reversible motor 64 which moves the spindle assembly 16 back and forth on the transverse assembly rail 62. Figures 7A and 7B show, respectively, side and front views of the spindle assembly 16 mounted on the carriage 60 of the transverse assembly 20. Figure 8 shows a rear panel of a controller 26 for use in the present invention. Two conductors 66a, 66b are provided to connect the other components of the system to the controller 26. The controller 26 can accurately control the distance traveled by the spindle assembly 16 along the guide rail 62 of the transverse assembly 20 by counting the steps or turns of the transversal motor. In addition, the controller 26 can reverse the direction of travel of the spindle assembly 16 along the guide rail of the transverse assembly 62 by reversing the direction of motor rotation. As shown in Figure 1, in the presently preferred embodiment of the invention, the controller is provided with a pair of programmable limit switches 30a, 30b, one for each recirculation position. As described above, each switch is detected and started as the longitudinal advance approaches the respective spool flange. As the PLS turn on, they initiate a recirculation sequence, or routine, that works to do three things: (1) detect the current transverse position; (2) initiate the deceleration of the longitudinal advance towards a predetermined detection position; (3) initiate an acceleration of the longitudinal advance at a predetermined speed in the opposite direction.
The present system provides a system and method which advantageously uses the voltage information from the voltage sensor 24, ie the position of the oscillating arm 52 in the oscillating assembly 48, to detect and correct error conditions in the winding procedure. The fiber tension is determined by a number of factors, including the rotation speed of the tension spool and the diameter of the winding surface spool. The systems of the prior art have used feedback from the oscillating assembly 48 to control the rotational speed of the spindle assembly 16 in order to maintain the tension of the optical fiber 22 at an optimum level, represented by the oscillating set point. However, the oscillating feedback, so far, has not been used to make adjustments in the flange restraining positions. When a dog bone condition or a flange space occurs, there is a peak or tilt in fiber tension that can be measured at the recirculation positions. For example, in a bone condition for dog, the diameter of the winding surface increases in the flange recirculation position, producing a concomitant increase in the tension of the optical fiber. In a flange space condition, the diameter of the winding surface decreases in the flange recirculation position, producing a decrease in the fiber optic tension. These changes in fiber tension are reflected in a deviation of the oscillating arm position from the oscillating set point in the recirculation positions. The currently preferred embodiment of the invention uses this deviation as the basis for making an adjustment in the flange recirculation positions. In the presently preferred embodiment of the invention, the oscillating arm position is captured in the flange recirculations. Specifically, the swing arm position is captured at the start of the third step in the cam profile routine described above. At that point in the routine, the longitudinal advance has reached its predetermined stop position before accelerating in the opposite direction. The range of oscillating arm positions taken in the illustrated embodiment is shown in Figure 9. There is a predetermined oscillating set point 68, ie, an oscillating arm position that reflects optimum fiber tension. Immediately surrounding the set point is an "inactive band" 70 which is the scale of accepted wobble arm positions adjacent to the set point, i.e., the system error threshold. As long as the captured swing arm position is within the inactive band 70, no error is detected. Immediately to the left of the idle band is a region 72 indicating a decrease in fiber tension associated with a flange space. Similarly, immediately to the right of the inactive band 70, is the region 74 indicating an increase in fiber tension associated with a dog bone condition. Regions 76, 78 outside -V (min) or + V (max) indicate that an alarm condition has occurred, requiring system intervention. Figure 10 is a flow diagram of a currently preferred embodiment of a method for automatically adjusting flange recirculation positions 80 according to the present invention. In a first step 82, the system is started. As part of this initialization, the oscillating set point and the inactive band are determined. Once the initialization is completed, the selection machine begins the winding of the optical fiber on the tensioning reel. In a second step 84, the controller 26 captures the oscillating arm position RECIRCULATING_SYSTEM_STREAM during each transverse recirculation of the tensioning spool. As explained above, one way to implement this step is to use controller programming programs and systems comprising a pair of programmable limit switches that are turned on at designated recirculation points to initiate recirculation at each flange. In this instrumentation, the oscillating arm position is captured when the longitudinal advance is stopped immediately before (for example, approximately 2 msec) of acceleration of the reverse direction. In practice, the maximum delay in the instantaneous exposure of the oscillating position is 8 msec. This is relatively insignificant compared to the 50-65 msec required for recirculation. In step 86, the controller calculates an error amount by comparing the instantaneous exposure of the oscillating position with the oscillating set point. The calculation can be expressed as follows: ERROR = POSITION_OF_RECIRCULATION - OSCILLATING POSITION OF ADJUSTMENT POINT In step 88, then the ERROR_MUESTRA_PROMEDIO. This is based on the number of passes / recirculations that occur before a correction is made. The controller can adjust this number, as desired. This calculation is as follows: n = N ERROR r AVERAGE SAMPLE ERROR = N where N = number of passes before correction. In step 90, then the controller determines whether the ERROR_MUESTRA_PROMEDIO is within the determined inactive band. The operator can adjust the idle band, as desired, using a keyboard, mouse or other suitable input device connected to the microprocessor controller. In step 92, if the ERROR_MUESTRA_PROMEDIO is not within the determined inactive band, a correction is made to the flange displacement. The calculations are made to adjust the flange displacement based on the gain of the system. The system gain includes two components, a differential GAIN_D gain, based on the difference between the current average sample error and the previous average sample error, and an integral GAIN gain, based on the magnitude of the current average sample error. The differential and integral gains are machine-specific quantities that are measured using known techniques. These gains are used to calculate the adjustment that will be made to the flange recirculation position ADJUST_OF_DISPLAZING using the following formula: ADJUST_OF_DISPLAZING = [DAN_GENANCE (ERROR_MUESTRA_PROMEDIO - ERROR_MUESTRA_PROMEDIO_ERRTERIOR) j + [GAIN J (ERROR_MUESTRA_PROMEDIO)] The use of GAIN_D and GAIN in this This is advantageous because it is more sensitive and accurate than a method in which a fixed displacement setting is used. In the present modality, the system makes a great adjustment for big errors, and small adjustments for small errors. In addition, the circuit algorithm used to calculate the flange adjustment can be adjusted, as desired. A positive or negative ERROR_MUESTRA_PROMEDIO indicates a dog bone or flange space, respectively. In step 94, depending on the flange, anterior or posterior, which is currently being sampled, the ADJUSTMENT OF DEPLOYMENT will apply to the BRIDAL_SHIFT as follows: Front flange: BRIDAL_SHIFTING BRIDAL_SHIFT + BRIDGET_FRAID Rear flange: BRIDAL_SHIFT BRIDGE SCROLLING - SCROLL ADJUSTMENT Finally, in step 96, the flange displacement is applied to the transverse tightening recirculation position. This relocates the programmable recirculation limit switch (PLS) as follows: RECIRCULATION POSITION_DEFINED_RECIRCULATION POSITION + BRIDE_SHIFT Then, the controller returns to step 84 to capture the swing arm position in the next recirculation.
The detected presence of the oscillating position within the range inactive, indicates that no error has occurred. In this way, in theory, no correction is required in the flange recirculation position. However, it has been found through experimentation, that even when the position detected oscillator is within the inactive band, it is advisable, however, in a currently preferred embodiment of the invention, to make an adjustment in the Flange position to induce a bone condition for dog. The reason why it is convenient to induce a dog bone is that a dog bone is much easier to detect for the system than a flange space. A dog bone can be detected almost immediately, since there is an immediate increase in the diameter of the surface of winding. In a flange space situation, however, fiber can continue to wind up for several layers before the fiber "falls" into the space, causing the decrease in fiber tension. In step 98, in order to prevent the development of a space for flange, a predetermined setting can be intentionally made, small, in the flange recirculation position towards the flange before returning to step 84, even if the oscillating position has been determined to be within the inactive band. In this way, the fiber that is wound on the reel will "slide" toward the flange at each step until the system detects a dog bone condition. When the dog bone condition is detected, the system will make a normal adjustment in the flange recirculation position, as described above, bringing it back to the inactive band. Once the recirculation position is back in the idle band, the slip procedure can be done to start again. It has been determined through experimentation, that this flange fit is advantageously a fraction of the diameter of the fiber, so that it will take several steps for a dog bone to be induced. In a presently preferred embodiment, the optical fiber diameter is 250 microns, and the flange fit is about one eighth of that diameter. In addition, in this modality, because a correction is made in each recirculation, the ERROR_MUESTRA_PROMEDIO is calculated in each recirculation. In other words, N will be 1. After the adjustment to the recirculation position is made, the controller returns to step 84 to capture the swing arm position in the next recirculation. Figure 11 shows an alternative embodiment of the invention, in which fiber 22 moves relative to the tensioning spool 18 in the transverse direction by means of a floating head assembly 100. This embodiment of the invention operates in a substantially similar manner as the previous modality. However, instead of moving the rotary reel back and forth on the transverse assembly, the system controls the backward and forward movement of the floating head 100. This is the type of arrangement found for example in a machine Stretch used in the manufacture of optical fiber. In this second embodiment, the system again uses information from the voltage sensor 24 to monitor the voltage on the fiber optic line, and uses that information to make adjustments to the recirculation positions for the floating head on any flange. In this way, it will be appreciated that the invention is equally applicable to this alternative embodiment. Finally, it should be noted that although the present invention is particularly suitable for use with optical fiber, it can be used with other systems in which a fiber, wire, thread or filament is wound on a reel. Although the above description includes details which will allow those skilled in the art to practice the invention, it should be recognized that the description is illustrative in nature and that many modifications and variations thereof will be apparent to those skilled in the art having the benefit of these instructions. For example, arrangements other than the oscillating assembly described above can be used to perform the voltage sensor function 24. Accordingly, it is intended that the invention be defined exclusively by the appended claims thereto and that the claims be interpreted as widely as allowed by the prior art.

Claims (29)

NOVELTY OF THE INVENTION CLAIMS
1. - A system for winding optical fiber on a reel, characterized in that it comprises: a spindle assembly to receive the reel and rotate it around its longitudinal axis; a fiber source to provide a continuous supply of fiber to the spool, the optical fiber being positioned relative to the spindle assembly, so that the rotation of the spool by the spindle assembly causes the fiber to be wound on the spool around the spindle. its longitudinal axis; a voltage sensing device for detecting and providing feedback related to the amount of tension in the fiber; a transverse means for causing the fiber to be wound on the reel back and forth between a front spool flange and a rear spool flange, the transverse means includes a previous recirculation position on the front spool flange and a position of rear recirculation on the rear spool flange; a controller to receive the fiber tension feedback and use the feedback to determine which adjustment, if applicable, will be made for the previous and subsequent recirculation positions.
2. The system according to claim 1, further characterized in that the tension sensing device comprises an oscillating assembly, said oscillating assembly having an oscillating arm with which the fiber is pushed, so that the position of the oscillating arm is a function of the tension of the fiber as it is wound on the reel, the fiber source comprises a position sensor to detect and provide, as the feedback, the position of the oscillating arm.
3. The system according to claim 2, further characterized in that the controller captures the position of the oscillating arm during a recirculation sequence on a flange and compares the recirculated captured position with an oscillating set point position to determine which setting , if applicable, will be made for the previous and subsequent recirculation positions.
4. The system according to claim 3, further characterized in that when comparing the oscillating recirculation captured position with the set point oscillating position, the controller calculates an amount of error by subtracting the set point oscillating position from the oscillating captured recirculation position.
5. The system according to claim 4, further characterized in that the controller calculates an average sample error by averaging the calculated error quantities for each recirculation before making an adjustment in an adjustable flange displacement which, together with a position of determined recirculation, determines the recirculation position in each flange.
6. The system according to claim 5, further characterized in that an error shows a positive average indicates a dog bone condition in which an excess amount of fiber is accumulating in the flange, and an error shows a negative average indicates a Flange space condition or cascade condition.
7. - The system according to claim 6, further characterized in that the controller determines whether the average sample error falls within a given inactive band.
8. The system according to claim 7, further characterized in that if the error shows average falls within the inactive band, the controller adjusts the flange displacement, so that the recirculation position moves a predetermined distance towards the flange, which tends to induce a bone condition for dog.
9. The system according to claim 8, further characterized in that the predetermined distance is a fraction of the diameter of the fiber.
10. The system according to claim 9, further characterized in that the predetermined distance is one eighth of the diameter of the fiber.
11. The system according to claim 7, characterized in that if the error shows average is outside the inactive band, the controller calculates to make an adjustment in the displacement of the flange.
12. The system according to claim 11, further characterized in that the adjustment to be made in the displacement of the flange is calculated based on the measured gain of the system.
13. The system according to claim 12, further characterized in that the measured gain of the system comprises a differential gain component GAIN_D and an integral gain component GAIN.
14. - The system according to claim 13, further characterized in that the adjustment to the flange displacement
ADJUSTMENT OF DEPLOYMENT is calculated with the following formula:
ADJUST_OF_DISPLAZAMIENTO = [GAIN_D (ERROR_MUESTRA_PROMEDIO ERROR_MUESTRA_PROMEDIO_ANTERIOR)] + [GAINJ
(ERROR_MUESTRA_PROMEDIO) j 15.- The system according to claim 14, further characterized in that the calculated displacement adjustment is applied to the previous flange using the following formula: WIND_SHIFT = WIND_SWITCH + WRATH_SET and where the calculated displacement adjustment is applied to the rear flange using the following formula: WIND_SHIFT = WIND_SHIFT - SCREEN_JUSTMENT. 16. The system according to claim 15, further characterized in that the recirculation position for a flange is relocated for the next recirculation using the following formula: RECIRCULATION POSITION_DETERMINED_RECIRCULATION_POSITION + BRIDAL_SHIFT 17.- A method for winding optical fiber on a reel, comprising: rotating the spool about its longitudinal axis; providing a continuous supply of fiber optic to the spool, so that the rotation of the spool causes the fiber to be wound on the spool about its longitudinal axis; detect and provide feedback related to the amount of tension in the fiber; causing the fiber, as it is wound on the spool, to advance longitudinally between an anterior spool flange and a rear spool flange; changing the direction of the longitudinal advance of the fiber in first and second adjacent recirculation positions, respectively, towards the front and rear spool flanges; use fiber tension feedback to determine which adjustment, if applicable, will be made for the previous and subsequent recirculation positions.
18. The method according to claim 17, further characterized in that the step of using the fiber tension feedback to determine which adjustment, if applicable, will be made for the previous and subsequent recirculation positions, comprises calculating an error amount. by subtracting a setpoint voltage from the amount of tension in the fiber detected at each recirculation position.
19. The method according to claim 18, further characterized by additionally comprising: calculating an average sample error by averaging the calculated error quantities for each recirculation position before an adjustment is made in an adjustable flange displacement which, together with a certain recirculation position, determines the recirculation position in each flange.
20. - The method according to claim 19, further characterized by additionally comprising: determining whether the error shows average falls within a certain inactive band.
21. The method according to claim 20, further characterized by additionally comprising: adjusting the flange displacement, so that the recirculation position moves a predetermined distance towards the flange, if the error shows average falls within the inactive band, which tends to induce a bone condition for dogs, in which there is an excess amount of fiber accumulating in the flange.
22. The method according to claim 21, further characterized in that the predetermined distance is a fraction of the diameter of the fiber.
23. The method according to claim 22, further characterized in that the predetermined distance is one eighth of the diameter of the fiber.
24. The method according to claim 20, further comprising: calculating an adjustment to be made in the displacement of the flange if the error shows average is outside the inactive band.
25. The method according to claim 24, further characterized in that the step of calculating an adjustment to be made in the displacement of the flange comprises: calculating the adjustment to be made in the flange displacement based on the measured gain of the system.
26. The method according to claim 25, further characterized in that the step of calculating the adjustment to be made in the displacement of the flange based on the measured gain of the system comprises: calculating the adjustment to be made in the flange displacement based on the measured gain of the system comprising a differential gain component GAIN_D and an integral gain component GAIN_J.
27. The method according to claim 26, further characterized in that the step of calculating an adjustment to be made in the displacement of the flange further comprises: calculating the adjustment in the flange displacement ADJUSTMENT OF DEPLOYMENT is calculated with the following formula: ADJUSTMENT OF DEPLAZING = [GAIN_D (ERROR_MUESTRA_PROMEDIO ERROR_MUESTRA_PROMEDIO_ANTERIOR)] + [GAINJ (ERROR_MUESTRA_PROMEDIO)]. The method according to claim 27, further characterized in that it additionally comprises: applying the displacement adjustment calculated to the previous flange using the following formula: WIND_SHIFT = WIND_SWITCH + WAVE_SET and apply the calculated displacement adjustment to the rear flange using the following formula: MOVEMENT_DE_BRIDGE = MOVEMENT_DEBRIDGE - ADJUSTMENT_of_DISPLACEMENT. 29. The method according to claim 28, further characterized in that it additionally comprises: relocating the recirculation position for a flange for the next recirculation using the following formula: RECIRCULATION POSITION_DECLIMATION_RECIRCULATION POSITION + BRIDAL DISPLACEMENT.
MXPA/A/2001/006707A 1998-12-29 2001-06-28 System and methods for automatically adjusting turnaround position in spool winders MXPA01006707A (en)

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Application Number Priority Date Filing Date Title
US60/114,032 1998-12-29

Publications (1)

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MXPA01006707A true MXPA01006707A (en) 2002-05-09

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