Abstract: A Bexible electronic slogging system was presented tmsed on rotary type serro motor, which aimed to improve the dynamic response of the shogging drive and decrease the impact of the guide bar during the higber speed running of warp-knitting machine. lii t6is system, the speed control mode , faster response urvo motor, no•t1at modified trapmoid motion law , and its electronic cain were chmen; ibe realiziition standard and method were also introdiiced in knitting machine which run at the speed ct 1 1100 r/mln in the experiments, and the vlbrution currcs showed thut the guide ber had weaker mechanical impact and higher dynamic response sliogging system designed following the previous step was successful, and the design principle of the clv:tronic shogjiing was tmtified
Key words ; carp -laiitting ; no-@f modi5ed trapeioid,- flexible electmnic shegging -, electmnic cam time-consuming and the response ratio was low because of the long scanning cycle of position control mode 0 Therefore, it resulted in that the guide bar of high-speed warp-knitting machine could not finish the accurate shogging in the narrow angle space during overlap ". Therefore, the speed control mode was chosen, instead of position conaol mode, to increase the response speed of servo motor. Meanwhile , the dynamic response perfomiance of high- speed warp-knitting machine would be improved, the mechanical impact of guide bar would be reduced, and the system design process would be siiiiplified. The ratio of the ldf CSt tOfSlOD Of (Il(•• SflfYO IBOtO£ I2fl1W8fll1 i 5 if1eftlI1 WHS i1 liZOdas standard to choose motor with high-response chancter rapidly. No-flat m‹x1ified trapezoid motion law was used to create electronic cam point-data sheet and design the system.
Introduction
Dot:ument code: A
The design procedure was also given t Furthermore, the successfully implemented test of the high-speed warp-knitting machine flexible electronic shogging system through this method was carried out.
1 Theoretical Analyses
Electronic shogging of warp-knitting machine is an important mechanism which drives the guide bar to finish the overlap atid the underlap according to the pattern through the servo motor. Equipped with the electronic shogging system, the warp-knitting machine can shorten the production developing period ', and produce the bigger pattern more than 8 0tXi knitting lines ' . The servo motors used in the electronic slogging of warp-knitting machine have two i:iuds, which are linear type and rotation type ']. The control precision and responsiveness of linear motor are better than the rotation
1. 1 Shogging features
The l‹:xip-formation mechanism runs a Omitting period when the spindle of the warp-Omitting machine urns one circle. During the knitting period, guide bar swings across the plane in which the needles are laid no times, and shogs on its both sides to make lapping movement. In order to avoid the touch between the needles and yarns in this swinging, the guide bar will stop shogging befow the guide needles swing in the plane of groove pin. The guide bar can move after the guide needles swing out motor’s 4 however, the price of liner motor is rather
expensive. Therefore, ii is necessary to choose the cheaper of the the plane. Therefore, the shogging the motion of intermittent s stop in one turn of the main
rotation motor to satisfy the electronic shogging of high-speed warp-knitting machine ' .xia ei «f. analyzed the principle of shogging movement, 旋转式伺服电机的柔性电子系统英文文献和中文翻译:http://www.youerw.com/fanyi/lunwen_204003.html