Four roll servo driven yarn feed module for precision yarn feed

A four roll yarn feed module for feeding yarns from a yarn supply to a needle on a multiple needle tufting machine comprising a servo motor mounted to rotationally drive a teethed sprocket, said teethed sprocket cooperating via teeth that intermesh with and drive teethed sections of first and second yarn feed rolls having yarn feeding surfaces mounted on parallel rotational axes for rotational movement, and the teethed section of the first yarn feed roll cooperating via teeth that intermesh to drive a teethed section of a third yarn feed roll having a yarn feeding surface, and the teethed section of the second yarn feed roll cooperating via teeth that intermesh to drive a teethed section of a fourth yarn feed roll having a yarn feeding surface.

A method of threading a four roll yarn feed module for feeding yarns from a yarn supply to a needle on a multiple needle tufting machine that comprises a servo motor mounted to rotationally drive a first top left yarn feed roll, a second top right yarn feed roll, a third bottom left yarn feed roll, and a fourth bottom right yarn feed roll, with each of the first, second, third, and fourth yarn feed rolls having a yarn feeding surface, and being mounted on parallel rotational axes for rotational movement, comprising feeding yarn around portions of the yarn feeding surfaces of at least three of said first, second, third, and fourth yarn feed rolls so that the aggregate amount of wrap of the yarn on the yarn feeding surfaces is at least 3π.