一般的罗拉测速表,普通叫它车头表,它的主要作用是测定罗拉的每分钟转速。一切机械连转上的速度,如果经过了皮带或绳子的传动,其间难免有滑动,所以计算出来的速度是不能绝对准确的,必须有待于测速表之实际测定。尤其是精纺机的前罗拉和织机的弯地轴,是纺织厂生产量方面的重要关键,每班运转时均须加以逐台测速记录,以利查考,并核算产量。因此纺织厂的试验室里,一只测速表是少不了的。 The general roller tachometer, commonly called its tachometer, its main role is to measure the roller speed per minute. All mechanical even turn on the speed, if after the belt or rope drive, during which inevitably there is sliding, so the calculated speed is not absolutely accurate, must be the actual determination of the speedometer. In particular, the front roller of the spinning machine and the bending axis of the loom are the key points in the production volume of the textile mill. Each shift must be measured speed-by-speed to facilitate the examination and accounting for production. Therefore, in a textile mill’s laboratory, a speedometer is indispensable.