Wheel alignment machine is based on the vehicle's four-wheeled parameters, through the adjustment to ensure the vehicle good driving performance and have a certain degree of reliability.

The installation for steering wheel of the car, the steering knuckle and the front axle between the three have a certain relative position. This relative position of the installation is called steering wheel positioning, also known as front wheel positioning. Front wheel positioning includes the main pin backward (angle), the main pin dumping (angle), front wheel camber (angle) and front wheel front four content. This is for both turns to the front wheel, the two rear wheels also exist with the rear axle between the installation of the relative position, said rear wheel positioning. Rear wheel positioning includes wheel camber (corner) and one by one rear wheel front beam. So that the front wheel positioning and rear wheel positioning together called four wheel positioning.

The main function of wheel alignment:

1) increase driving safety;

2) reduce tire wear;

3) to keep straight when the steering wheel straight, to maintain a straight line;

4) steering steering wheel automatic correction;

5) increase driving control;

6) reduce burning consumption;

7) to reduce the suspension component wear.