The drive wheel and the conclusion cannot be driven by two motors! It can only be driven by one motor. The driven wheel is called the driving wheel. The wheel hub is made of wear-resistant rubber for increasing the friction. The driven wheel does not need to be connected to the motor. The wheel hub does not need to be treated. The welding roller frame generally uses four wheels, two driving wheels (driven by the motor), and the other two are passive wheels (no motor drive required). The workpiece is placed on four rollers, and the motor is driven. Since the driving wheel hub is rubber and the friction is greater than the metal, the workpiece can be rotated. The driven wheel mainly supports the bearing, and it also rotates, which is driven by the workpiece.