Methods and apparatus for forming a cable media
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. An apparatus for forming a cabling media using 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, the apparatus including:
a) a wire pair twist modulator adapted to impart a purposefully varied pretwist to the wire pair; and
b) a wire pair twisting device downstream of the wire pair twist modulator, wherein the wire pair twisting device is adapted to impart additional twist to the wire pair,
wherein the apparatus is adapted to twist 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, and
wherein the twist length purposefully varies by no more than about +/−0.05 inches from a mean twist length of the twisted wire pair.
2. The apparatus of claim 1 wherein the wire pair twist modulator is adapted to impart each of a positive twist and a negative twist to the wire pair.
3. The apparatus of claim 1 including an engagement member adapted to engage the wire pair and rotationally oscillate about a twist axis.
4. The apparatus of claim 3 wherein the engagement member includes at least one eyelet to receive the first and second conductor members.
5. The apparatus of claim 3 including a first eyelet to receive the first conductor member and a second eyelet to receive the second conductor member.
6. The apparatus of claim 3 including a plurality of serially arranged engagement members, wherein each of the engagement members is adapted to engage the wire pair and rotationally oscillate about a respective twist axis.
7. The apparatus of claim 6 wherein the wire pair twist modulator is adapted to rotationally oscillate the plurality of engagement members different distances.
8. The apparatus of claim 1 wherein the wire pair twisting device is adapted to impart a substantially constant rate of twist per unit length to the wire pair.
9. The apparatus of claim 1 including a controller that substantially randomly varies the twist length of the wire pair.
10. The apparatus of claim 1 including a controller that varies the twist length of the wire pair in accordance with an algorithm.
11. The apparatus of claim 1 including a supply of the first and second conductor members.
12. An apparatus for forming a cabling media using 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, wherein the apparatus is adapted to twist 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,
wherein the apparatus is further adapted to twist the 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.
13. The apparatus of claim 12 including:
a) a core twist modulator adapted to impart a purposefully varied pretwist to the twisted wire pair and to the second twisted wire pair; and
b) a core twisting device downstream of the core twist modulator, wherein the core twisting device is adapted to impart additional twist to the twisted wire pair and the second twisted wire pair.
14. The apparatus of claim 13 wherein the core twisting device is adapted to impart a substantially constant rate of twist per unit length to the twisted wire pair and the second twisted wire pair.
15. The apparatus of claim 1 including a jacketing device adapted to apply a jacket about the twisted wire pair.
16. An apparatus for forming a cabling media using 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, wherein the apparatus is adapted to twist 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,
wherein the twist length purposefully varies by no more than about +/−0.05 inches from a mean twist length of the twisted wire pair,
the apparatus further adapted to twist the 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, and further including:
a) a wire pair twist modulator adapted to impart a purposefully varied pretwist to the wire pair, the wire twist modulator including an engagement member adapted to engage the wire pair and rotationally oscillate about a twist axis and a controller to control the oscillation of the engagement member;
b) a wire pair twisting device downstream of the wire pair twist modulator, wherein the wire pair twisting device is adapted to impart additional twist to the wire pair, and wherein the wire pair twisting device is adapted to impart a substantially constant rate of twist per unit length to the wire pair;
c) a core twist modulator adapted to impart a purposefully varied pretwist to the twisted wire pair and to the second twisted wire pair; and
d) a core twisting device downstream of the core twist modulator, wherein the core twisting device is adapted to impart additional twist to the twisted wire pair and to the second twisted wire pair, and wherein the core twisting device is adapted to impart a substantially constant rate of twist per unit length to the twisted wire pair and the second twisted wire pair.