How to Buy Four Wheel Alignment

The four wheel alignment is an optical instrument, in addition to the three-dimensional imaging developed by the United States four wheel alignment using high-definition dual cameras, and four target plate measuring system, without electronic sensors, the other four wheel alignment must use electronic sensors. Often test the accuracy of the sensor to determine the accuracy of the system. Therefore, the key technologies of the four wheel alignment is used on the sensor beam angle measurement is what kind of optical imaging and data processing technology (commonly known as "camera" technology ;).

Four wheel alignments should have the function:
1. Rims compensation function: Rims and fixture toe / camber deflection error of ± 0.1 ° = ± 0.6mm when the acceptable error. Under normal circumstances, the suspension sensor folder with a certain error (Mercedes-Benz, BMW service stations are equipped with special fixtures), the yaw error and this error, aluminum rims, without rims compensation may be greater than ± 0.2 ° (± 1.2mm), iron rim runout error do rims compensation possible up and down the large sub-± 0.3 ° (± 1.8mm). This is the difference of the accuracy of the iron rims stamping manufacturing process precision and cast aluminum manufacturing process, so the vehicles of low-grade or high-end vehicles are required to do rims compensation. Luxury cars because of its high-performance requirements, low car because of the low quality of the steel ring (especially steel ring deformation) caused.

2. lift station calibration function: wheel alignment lift high level degrees. Strict sense, the maximum allowable load, the platform need to keep about 1mm and around 2mm level. About 1mm platform error will cause the camber measurement error of 0.04 ° and 0.06 ° inclination angle measurement error around 2mm platform error will lead to. Most of the four wheel alignment manufacturers to calibrate the sensor electronic components on a regular basis (example: As the ambient temperature, battery power change caused by the AD conversion rate of change because, with PSD four wheel alignment sensor in constant need of the sensor element correction, also known as the "Sensor calibration"), but this is only the instrument, not really solve the lift station level problem. High-precision wheel alignment instrument in order to ensure the measurement accuracy of ± 0.05 °, specifically rationing users used to lift the level of compensation for workers calibration frame, station calibration has two functions. First, calibration of the sensor element; sensor measures the lift station level degree difference, and use the software for zero compensation, to avoid errors caused by the lift station is not level.

3 from the top first place the function of the body to adjust. Wheel alignment adjusted angle, camber, lifting the vehicle to adjust, but the angle change with lift, is often difficult to quickly achieve the adjustment accuracy. Advanced wheel aligner from the top body, the software automatically calculates the wheel after unloading angle compensation function, repair personnel can be compensated data one-time adjustment in place, to avoid the adjustment backward the camber repeatedly lifting the Measurement trouble.

4. "To promote the line" positioning function, not to remove the steering wheel to adjust. The wheel alignment is a real car "to promote the line as the benchmark of four positioning when adjusting the orientation angle of the steering wheel first fixed in the upright position, the vehicle straight when the steering wheel should be adjusted naturally back in order to avoid the phenomenon of the steering wheel is not correct. Some wheel alignment with the demolition of the steering wheel to correct the steering wheel is not correct is not correct (and often locator adjust to the geometric centerline as the benchmark, this outcome), any demolition of the steering wheel with airbag The vehicle likely to cause the failure of the airbag function.

5. adjust the interface should be scientific and rational. The wheel alignment angle is close linkage adjustment at an angle will cause the other angles change. From the process in terms of the scientific process is to adjust the rear wheel and then adjust the front wheel, first dip after the tone, and then transferred extraversion, the last tune before the beam. Adjust the graphical interface, the instrument should be to the rear wheel, front wheel adjustable angle, especially the angle adjustment linkage on the same screen, make the adjustment more easy and intuitive.

6. System diagnostics and 3D graphics to guide the process. Have varying degrees of light, temperature, humidity, and operating voltage on the four wheel alignment conditions in software design, a good four wheel alignment diagnostic instrument system state, such as: real-time diagnosis of 5 Bluetooth transceiver operating parameters of (4 sensors and host), and four sensor battery and so on. In addition, many repair personnel are unfamiliar to the computer, wheel alignment throughout the measurement process should be prompted by the three-dimensional graphics, and guide both the image and clear, and can effectively avoid misuse. Mechanic without specialized computer knowledge to meet the professional operation results.

7.Before adjustment after comparison of the data and the data of vehicle regulations at any time exchange functions. Computer comparison of the measured value and the car standard data that cause the wheel alignment cause of the problem, and should meet before adjustment for raw data is automatically retained in the screen, the adjusted data with the original comparison of the data shown in the same screen, to customers communication and to facilitate the master adjustment. General wheel alignment usually is the first vehicle regulation and then to measure, in order to meet the need for rapid measurement of some locator can not choose the car regulations direct measurement of the orientation angle. This provides two convenient; First, the vehicle regulations do not choose an experienced master, to directly determine the problems of orientation angle, second is to avoid the regulations of the election the wrong car to return to the trouble of repeated measurements of the initial menu (a lot of four wheel alignment must first select the vehicle regulations to be measured).

8 surrounded by large car measurement functions. There are three current surrounded by test method. The first one is the downward movement of the sensor as a whole; second sensor suspension with re-designed to tilt in the form of; third is surrounded by large compensation software testing. The first vertical move due to the sensor in the fixture, the angle deviation error is difficult to avoid. Second measurement methods encountered in the tire or rim diameter smaller models, due to the measuring head has been designed as a fixed tilt down, the position of ultra-low, hit the steering wheel often touch to the lift platform, the measurement cannot carried out. In contrast, the third method, using software based on different models arbitrarily adjust the sensor inclination, thus avoiding the above-mentioned obstacles, is currently the most effective methods of measurement.