A new type of microprocessor controlled （一种新型的微处理器控制）.pdf

Indian journal of Fibre Textile Research Vol. 28, September 2003, pp . 275-280 A new type of microprocessor controlled positive dobby Guo Yueyanga Chen Ruiqi Mechani cal Eng ineering College, Donghua University , Shanghai, China 200051 Received 22 March 2002; revised received and accepted II July 2002 A new microprocessor controlled positive dobby ha s been developed which is converted from model Staubli 2521 , a negative mechanical control dobby . The new mod el has been proved to be practicable by motion simul ati on and a prototype . The main construction is simpler than that of many present positive dobbies, such as Staubli 2232 and Staubli 2600 seri es. The new model is expected to perform better than Staubli 2232 . Keywords: Kinematic analysis, Microprocessor, Motion simulation, Positive dobby 1 Introduction In positive dobby shedding, the dobby machine both raises and lowers the shafts and, therefore, it can satisfy the requirement of weaving heavy fabrics and high loom speed. But the current positive dobbies, such as Staubli 2232 and Staubli 2600 series, are too sophisticated and expensive. It is worthwhile to 2 develop a new type of positive dobby, which is simple in construction , easy to be produced, and cheap. Model Staubli 2521, a negative one, which has simple construction and can run at a relatively high speed, is Fig. I--Driving mechani sm of Staubli 252 1 ideal for being converted into a positive dobby to meet the requirements. The present work was,