Design of Experiments Optimization Study on the Powered Roll Gin Stand: Part I

Abstract

The powered roll gin stand has been evaluated in numerous studies evaluating its impact on production and fiber quality properties. The question remained as to what speed the various components of the powered roll gin stand should be operated at to optimize performance. The three main components of the power roll gin stand are the paddle roll, seed finger roll, and gin saw. This article presents results of an optimization study conducted on the second power roll gin stand operating at the USDA-ARS gin lab in Lubbock, Texas. The results are based on lint samples taken after the gin stand (before lint cleaning) and after one stage of lint cleaning, seed samples, and performance data. Of the 14 response variables evaluated, four variables resulted in significant models: seed coat neps, short fiber content, ginning rate, and visible mechanical damage. Several optimal solutions were obtained based on the input factors used in the evaluation. When including all response variables in the analysis, the optimal operational settings for a retrofitted Lummus-116 powered roll gin stand before and after lint cleaning were: paddle roll speed = 209 and 209 rpm, paddle roll loading = 17.1 and 17.0 amps, saw speed = 831 and 829, and seed finger speed = 26 and 21 rpm, respectively. The influence of the various components of the powered roll gin stand on production rate, turnout, and various fiber quality parameters need to be understood to a greater extent so that control systems can be developed to take full advantage of this technology.