Methods and apparatus for forming cable media
View Patent ↗A method for forming a cabling media includes providing a wire pair including first and second conductor members. Each of the first and second conductor members includes a respective conductor and a respective insulation cover surrounding the conductor thereof. The first and second conductor members are twisted about one another to form a twisted wire pair having a twist length that purposefully varies along a length of the twisted wire pair. The method may include: imparting a purposefully varied pretwist to the wire pair using a wire pair twist modulator; and imparting additional twist to the wire pair using a wire pair twisting device downstream of the wire pair twist modulator.
1. A method for forming a cabling media, the method comprising:
a) providing a wire pair including first and second conductor members, each of the first and second conductor members including a respective conductor and a respective insulation cover surrounding the conductor thereof; and
b) twisting the first and second conductor members about one another to form a twisted wire pair having a twist length that purposefully varies along a length of the twisted wire pair, including:
imparting a purposefully varied pretwist to the wire pair using a wire pair twist modulator; and
imparting additional twist to the wire pair using a wire pair twisting device downstream of the wire pair twist modulator.
2. The method of claim 1 wherein the pretwist imparted by the wire pair twist modulator to the wire pair varies across an absolute range of at least 0.5% of a nominal twist length of the twisted wire pair.
3. The method of claim 1 including imparting each of a positive twist and a negative twist to the wire pair.
4. The method of claim 1 including engaging the wire pair with an engagement member and rotationally oscillating the engagement member about a twist axis.
5. The method of claim 4 including engaging the wire pair with a plurality of serially arranged engagement members and rotationally oscillating each of the engagement members about a respective twist axis.
6. The method of claim 5 including rotationally oscillating each of the engagement members a different angular distance.
7. The method of claim 1 including imparting a substantially constant rate of twist per unit length to the wire pair using the wire pair twisting device.
8. The method of claim 1 including substantially randomly varying the twist length of the wire pair.
9. The method of claim 1 including varying the twist length of the wire pair in accordance with an algorithm.
10. The method of claim 1 further including twisting the first twisted wire pair and a second twisted wire pair about one another to form a twisted core having a length such that a twist length of the twisted core purposefully varies along the length of the twisted core.
11. The method of claim 10 including:
a) imparting a purposefully varied pretwist to the first and second twisted wire pairs using a core twist modulator; and
b) imparting additional twist to the first and second twisted wire pairs using a core twisting device downstream of the core twist modulator.
12. The method of claim 11 including imparting a substantially constant rate of twist per unit length to the first and second twisted wire pairs using the core twisting device.
13. The method of claim 1 including applying a jacket about the twisted wire pair.
14. A method for forming a cabling media, the method comprising:
providing a first twisted wire pair including first and second conductor members and a second twisted wire pair including third and fourth conductor members, each of the first, second, third and fourth conductor members including a respective conductor and a respective insulation cover surrounding the conductor thereof; and
b) twisting the first and second twisted wire pairs about one another to form a twisted core having a twist length that purposefully varies along a length of the twisted core, including:
imparting a purposefully varied pretwist to the first and second twisted wire pairs using a core twist modulator; and
imparting additional twist to the first and second twisted wire pairs using a core twisting device downstream of the core twist modulator.
15. The method of claim 14 wherein the pretwist imparted by the core twist modulator to the first and second twisted wire pairs varies across an absolute range of at least 0.1 twists/inch.
16. The method of claim 14 including imparting each of a positive twist and a negative twist to the first and second twisted wire pairs.
17. The method of claim 14 including engaging the first and second twisted wire pairs with an engagement member and rotationally oscillating the engagement member about a twist axis.
18. The method of claim 17 including engaging the first and second twisted wire pairs with a plurality of serially arranged engagement members and rotationally oscillating each of the engagement members about a respective twist axis.
19. The method of claim 18 including rotationally oscillating each of the engagement members a different angular distance.
20. The method of claim 14 including imparting a substantially constant rate of twist per unit length to the first and second twisted wire pairs using the core twisting device.
21. The method of claim 14 including substantially randomly varying the twist length of the core.
22. The method of claim 14 including varying the twist length of the core in accordance with an algorithm.
23. The method of claim 14 including applying a jacket about the twisted core.
24. The method of claim 1 including:
providing a second wire pair including a pair of conductor members each including a respective conductor and a respective insulation cover surrounding the conductor thereof;
twisting the conductor members of the second wire pair about one another to form a second twisted wire pair having a second twist length that purposefully varies along a length of the second twisted wire pair; and
applying a jacket about the first and second twisted wire pairs.
25. The method of claim 24 including:
providing third through twenty-fifth wire pairs each including a pair of conductor members each including a respective conductor and a respective insulation cover surrounding the conductor thereof;
twisting the conductor members of each of the third through twenty-fifth wire pairs about one another to form, respectively, third through twenty-fifth wire pairs having, respectively, third through twenty-fifth twist lengths that purposefully vary along a length of the respective twisted wire pair; and
applying the jacket about the third through twenty-fifth twisted wire pairs.
26. The method of claim 24 further including:
providing third and fourth wire pairs, each wire pair including a pair of conductor members, each conductor member including a respective conductor and a respective insulation cover surrounding the conductor thereof;
twisting the conductor members of the third wire pair about one another to form a third twisted wire pair having a third twist length that purposefully varies along a length of the third twisted wire pair;
twisting the conductor members of the fourth wire pair about one another to form a fourth twisted wire pair having a fourth twist length that purposefully varies along a length of the fourth twisted wire pair; and
applying the jacket about the third and fourth twisted wire pairs.
27. The method of claim 26 wherein the first, second, third and fourth twist lengths each purposefully vary over a range of about +/−(7 to 12)% of a mean value of the respective twist length.
28. The method of claim 27 wherein:
the first twist length purposefully varies over a range of about +/−11.3% of a mean twist length of the first twisted wire pair;
the second twist length purposefully varies over a range of about +/−12.2% of a mean twist length of the second twisted wire pair;
the third twist length purposefully varies over a range of about +/−8% of a mean twist length of the third twisted wire pair;
the fourth twist length purposefully varies over a range of about +/−7.5% of a mean twist length of the fourth twisted wire pair.
29. The method of claim 1 wherein the twist length purposefully varies over a range of about +/−(7 to 12)% of a mean value of the twist length.
30. The method of claim 1 wherein the twist length purposefully varies across an absolute range of at least 0.5% of a nominal twist length of the twisted pair.
31. The method of claim 30 wherein the twist length purposefully varies across an absolute range of between about 1 and 5% of the nominal twist length of the twisted pair.
32. The method of claim 1 wherein the twist length purposefully varies over a range of +/−0.05 inch.
33. The method of claim 1 wherein the twist length purposefully varies over a range of +/−0.15 inch.
34. The method of claim 1 wherein the twist length purposefully varies over a range of +/−0.25 inch.
35. The method of claim 1 wherein the twist length purposefully varies over a range of +/−0.5 inch.
36. The method of claim 1 wherein the twist length purposefully varies over a range of +/−1.0 inch.
37. The method of claim 1 wherein a ratio of a range of purposeful variation in the twist length to a mean twist length of the twisted pair is about 20%.
38. The method of claim 1 wherein a ratio of a range of purposeful variation in the twist length to a mean twist length of the twisted pair is about 50%.
39. The method of claim 1 wherein a ratio of a range of purposeful variation in the twist length to a mean twist length of the twisted pair is about 75%.
40. The method of claim 1 further including twisting the first twisted wire pair and a second twisted wire pair about one another to form a twisted core having a length such that a twist length of the twisted core is not purposefully varied along the length of the twisted core.
41. The method of claim 10 including substantially randomly varying the twist length of the core.
42. The method of claim 10 including varying the twist length of the core in accordance with an algorithm.
43. The method of claim 10 , wherein the twisted core of the cabling media is twisted in only one direction.
44. The method of claim 14 wherein the first and second conductor members are twisted about one another but do not have a purposefully varied twist length.
45. The method of claim 14 , wherein the twisted core of the cabling media is twisted in only one direction.
46. The method of claim 15 wherein the twist length of the twisted core purposefully varies across an absolute range of between about 0.1 and 1.0 twists/inch.
47. The method of claim 14 wherein the twist length of the twisted core purposefully varies over a range of at least 0.5% of a mean twist rate of the twisted core.
48. The method of claim 47 wherein the twist length of the twisted core purposefully varies over a range of between about 1 and 10% of the mean twist rate of the twisted core.