Development of autoleveler system for digital carding machine

The main aim of developing the autoleveler system for the digital carding machine is to obtain a higher-quality sliver,especially for improving a lower short segment irregularity sliver. The hardware part of the autoleveller system was built up of the touch panel,the encoder,the displacement sensor,the PLC and inverter motor. It can be easily to determinate the delay time of the open-loop autoleveller system of the carding machine by the length measuring and marking method. Finally,abandoning the conventional timing delay law,the displacement method was used to design the timing delay control program to meet the demand of targeted leveling of the open-loop autoleveller system. It shows that the 1m and 5 m weight unevenness of the cotton and acrylic fiber sliver can be improved as high as 15. 36%,6. 42%,14. 85% and 6. 82%,respectively,when this system was used on the carding machine and as a result,the higher-quality sliver can be obtained thereby.