Patent ID: 7082746

Claim:
A process for piecing a yarn in an open-end spinning machine, the process comprising of the steps of: providing optimized fiber material specific preprogrammed values in a control device with the preprogrammed values being relevant to optimized piecing of yarn in an open-end spinning device; entering data relating to current prevailing spinning conditions which include fiber material information, yarn information and spinning element information of the open-end spinning device into the control device; converting the data relating to current prevailing spinning conditions into numerical values; computing settings of work phases relevant to piecing of yarn by using the preprogrammed values and the numerical values for current prevailing spinning conditions in multiple computation formulas; using the settings calculated from the multiple computation formulas in the control of the piecing of the yarn in the open-end spinning device; and wherein different preprogrammed values are assigned to different fiber materials being spun, and based on the data relating to fiber material specified preprogrammed values assigned to the specified fiber material are incorporated into the multiple computation formulas.