Yarn feed system for tufting machines
A yarn feed system, enabling the control of individual yarns to the needles of a tufting machine, and which system can be manufactured as a substantially standardized unit or attachment that can be removably mounted to a tufting machine. The yarn feed unit includes a series of yarn feed devices for feeding each of the yarns to the needles of the tufting machine, and a series of yarn feed controllers that monitor and control the operation of the yarn feed devices to control the feeding of the yarns to the needles according to programmed pattern instructions.
1. A tufting machine for forming patterned tufted articles, comprising:
at least one reciprocating needle bar carrying a series of spaced needles;
backing feed rolls for feeding a backing material through the tufting machine;
a series of servo-motor driven yarn feed devices, each including a servo-motor and a feed roll driven thereby,
wherein a majority of the yarn feed devices receive at least two yarns per feed roll and feed each of the yarns to selected ones of the needles so as to form at least two pattern repeats across the backing material, and
wherein there are approximately one-half the number of yarn feed devices as there are needles of the tufting machine; and
a control system for controlling feeding of the yarns by the yarn feed devices to form a desired tufted pattern.
2. The tufting machine of claim 1 and further comprising a yarn distribution device having at least one tube bank section, and wherein each of the yarn feed devices feeds at least two yarns each through separate tubes of the at least one of tube bank section to the needles.
3. The tufting machine of claim 2 and wherein the yarn feed tubes of said tube bank are scrambled.
4. The tufting machine of claim 1 and further comprises a series of yam feed controllers each controlling one or more of the yarn feed devices.
5. The tufting machine of claim 1 and further comprising a tube bank having a series of tubes for feeding the yams to their selected needles.