The invention discloses an automatic slack
bobbin winder, comprising a winding device, a variable amplitude
yarn guide device, a fixed-length control device, a tension regulating device and a host control device, all of which are arranged on a frame and driven by a friction roller motor and a groove drum motor, respectively, wherein the winding device comprises a winding rack, a friction roller and a groove drum; the variable amplitude
yarn guide device comprises a variable amplitude guide rail, a tension spring, a movable pull rod and an adjustable rotating rod; and the fixed-length control device comprises an
infrared light-operated
yarn detector, a
wire cutter, an alarm indicator lamp and a
reset button, as well as a singlechip for controlling the devices, wherein the singlechip is connected to the host control device through an RS-485
bus. In the technical scheme, the automatic slack
bobbin winder is simple in structure, rational in design, low in cost, and low in
noise; and when in use, the automatic slack
bobbin winder is capable of conveniently and accurately realizing the functions of pineapple-shaped forming,
fixed length and automatic stopping on yarn breakage, and capable of realizing high-quality slack winding, improving the quality of
dyeing in subsequent procedures and achieving smooth unwinding, thus improving the working efficiency and economic benefit of factories.