AUTO DRAFT optimises the break draft for the autoleveller draw frame fully automatically. In less than one minute the system, which can be optionally integrated into the Draw Frame TD 8, makes an automatic recommendation for the ideal material-specific break draft. The break draft is decisive for yarn quality. The degree of break draft has a major influence on evenness and strength of yarn, number of imperfections and running properties of the spinning machine. Compared to this, the total draft has only a minor influence on yarn quality. Furthermore, the total draft is specified by the spinning plan and is therefore only variable within limits.

At the touch of a button, the draw frame moves along the entire possible break draft zone, measuring the draft force. It takes only 60 seconds to collect all the necessary information and determine the ideal degree of the break draft. As soon as the operator confirms this value on the screen, the draw frame is ready for production.

AUTO DRAFT is suitable for all materials since it considers all major factors:

• Fed fiber mass
• Fiber characteristics
• Fiber-fiber friction
• Fiber-metal friction
• Machine settings
• Ambient atmosphere, etc.

Depending on whether a spinning mill produces only one or several different materials, AUTO DRAFT can be applied in two ways. In the first case, only one single draw frame is equipped with AUTO DRAFT as „pilot machine“. This draw frame is used to determine the optimum break draft and subsequently transfer it to the other machines. In highly flexible installations with different materials that are subject to frequent change it is practical to equip all draw frames with AUTO DRAFT.