The diameter of the pulleys. The only drawback of strip pylors is that they often have saws. This is due to an excess in the process of rotation of the pulleys. The more their diameter, the fewer speeds need to be made when saving the linear speed of the tape of 30 meters per second. The smaller the diameter, the more revolutions you will have to do to maintain the linear speed of the device. Thus, it turns out that the larger the diameter, the lower the speed of twisting the pulleys, the less extensions and bends of the tape canvas, the less the likelihood that the canvas will break during operation.