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,