A system for in-line treatment of thread for use with a thread consuming device is provided. The system comprises at least one treatment unit being configured to dispense one or more coating substances onto the at least one thread when activated and a thread speed sensor being driven by the motion of the at least one thread. A method is further provided.

A waterless yarn dyeing system includes a piece of yarn separation equipment and a piece of dyeing equipment. The yarn separation equipment is adapted for separating a plurality of yarns. The dyeing equipment is adapted for outputting an ink to the yarns, and includes an ink supply device, an inkjet device, and at least two pump units. The ink supply device includes two ink containers that are adapted for holding the ink, at least two ink supply tubes that are respectively connected to the ink containers, and an ink tank that is connected to the at least two ink supply tubes. The at least two pump units are respectively disposed on the at least two ink supply tubes. Each of the at least two pump units includes an input pump and an output pump that are operable to adjust a flow rate of the ink, and a temporary storage box.

A waterless yarn dyeing system is adapted for outputting a liquid to a plurality of yarns. The waterless yarn dyeing system includes a piece of dyeing equipment, and a piece of color development and dye fixation equipment. The dyeing equipment includes a liquid supply device, and a spray device. The spray device includes a lower body that communicates with the liquid supply device, and an upper body that communicates with the liquid supply device and that is connected to an upper side of the lower body. The color development and dye fixation equipment includes a dye fixation device that includes a body unit, a heater unit, and a circulation unit. The body unit has a heating space that is adapted for the plurality of yarns to pass therethough, a lower vent that is located below the heating space, and an upper intake that is located above the heating space.