EBA恒速电子送经/EBC分段式电子送经
EBA恒速电子送经（EBA constant-speed eletronic let-off）:
定速电子送经机构又称EBA电子送经机构，其作为特里柯脱型与拉舍尔型经编机的标准配置，主要应用于花纹比较简单，一个完全组织中每个横列的线圈长度基本不变或很少变化，即定速送经的场合。
Constant speed electronic let-off mechanism is also called EBA electronic let-off mechanism, as the standard configuration of Terico type and Raschel warp knitting machine, mainly used in simply decorative pattern, which the length of a coil in a complete organization is essentially constant or rarely varies, namely the constant speed let off.
工作原理：基准信息取之于主轴上的交流电动机，当实测送经速度与预定送经速度不等时，通过变频器使电动机增速或减速。
Working principle: The baseline information depends on the main shaft of ac motor. When the measured let off speed and reserve let off speed is not equarl, increasing or reducing speed by frequency converter motor.
主要优点：可能消除或减少�；崽�；实现间歇送经； EBA电子送经机构配置了一个大功率的三相交流电动机和一个带有液晶显示的计算机，机器的速度和送经量可以方便地使用键盘输入，并且送经量可以编程；具有双速送经功能，每一经轴可在正常送经和双速送经中任选一种；经轴可以短时间向后转动或者停止送经。
Main advantages: May eliminate or reduce downtime stripes; Realizing indirect let off; EBA electronic let-off mechanism is configured with a high power three-phase ac motor and a computer with the liquid crystal display, the speed of the machine and let off easily using the keyboard input, and let off quantity can be programmed; Having the function for let off with double speed, each beam in the normal one or double speed classics could be choosen; Turning back or stopping let off beam can be in a short time.
原理图(Schematic diagram)：
EBC分段式电子送经(EBC stage-by-satge eletronic let-off)：
多速电子送经机构又称EBC电子送经机构，主要包交流伺服电动机和可连续编程送经的积极式经轴传动装置。
Multi-speed electronic let-off mechanism is also called the EBC electronic let-off mechanism, mainly including the ac servo motor and continuous programming let-off mechanism of the active beam transmission device.
在启动经编机前，必须先通过键盘将下列参数输给计算机：经轴编号、经轴满卷时外圆周长、�；笨张掏分艹�、满卷时经轴卷绕圈数以及该经轴每腊克的送经长度。其中每腊克送经长度不一定固定，而是可以根据织物的组织结构的需要任意编制序列，最多可编入199种序列，累计循环可达8百万线圈横列。
Before starting the warp knitting machine, firstly we must through the keyboard input the following parameters into the computer: beam number, the outer circumference when the sharp full, pan head circumference at downtime space-time, warp beam winding turns on full volume, and the length of let off in this beam for each lacquer. Each lac' length of let-off is not fixed, which can compile any sequence according to the needs of the fabric structure, a maximum into 199 kinds of sequence. The cumulative cycle can add up to 8 million course.
该机构中经轴脉冲信号来自经轴顶端，而不是取之于经轴的表面测速辊，因而反映的是经轴转速，而不是经轴线速度。但计算机可以根据所输入的经轴在空卷、满卷时的直径以及满卷时的绕纱圈数，逐层计算出经轴瞬时直径，并结合经轴脉冲信号折算成表面线速度，而后将此取样信息输入计算机中，与储存器的基准信息一一比较。如果取样与基准信息一致，则计算机输出为零，交流伺服电动机维持原速运行；当取样信息高于或低于基准信息时，计算机输出不为零时，将在原速基础上对交流伺服电动机进行微调。由于采取了这种逐步逼近的控制原理，送经精度可以大大提高，其控制精度可达1/10个横列的送经长度。
In this mechanism, the beam pulse signal comes from the top of the warp beam, rather than on the surface of the beam speed of the roller. And thus reflects the beam speed, rather than the beam linear velocity. But the computer can calculate the instantaneous diameter of warp beam step by step, depended on the input beam when the full empty volume, diameter and number of winding turns in full volume, combined with the warp beam pulse signal to convert into linear velocity surface. Then the sampling information input to the computer, combined with the baseline information storage one by one. If the sample is consistent with the baseline information, the computer output is zero, ac servo motor to maintain the original speed operation; When sampling information above or below the benchmark information, computer output is not equal to zero, the computer will be on the basis of the original speed for ac servo motor for fine-tuning. Thanks to this approach, the control principle of let-off mechanism can greatly improve the precision, which can reach 1/10 of the length of the row let off.
原理图(Schematic digaram)：
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