(1) Technical essentials for adjusting the sensor level.The requirement for sensor level adjustment is that the four heads are on a level surface. When adjusting the level, you only need to look at the measurement angle of the four sensors. As long as the difference between the maximum value and the minimum value of the four data is within 30′, the smaller the difference is, the smaller the error is. It is not necessary to care about the positive, negative and large changes in the data. If the data is -2° or -1° at the same time, there will be no error in the measurement results. In this way, when encountering a vehicle with a low chassis, it is only necessary to lower the four heads at the same time to measure normally.
(2) Use and maintenance of fixturesNote that when the card is loaded, the common plane of the three limit points of the claw hook should be parallel to the side of the wheel. The reason is that the angle of the wheel to be tested is equal to the angle of the fixture, otherwise the measurement error will be increased.
(3) Front wheel carousel use and maintenanceThe front wheel turntable should be noted in use: 1、 Insert the turntable fixing pin into the hole after each positioning is completed, so as to avoid impact damage on the board. 2、 Try to avoid sand entering the plate. 3、 Regularly check the large nut on the back of the turntable. Avoid loose. 4 、regular maintenance. During maintenance, remove the large nut on the back to disassemble the turntable, remove the sand and dirt from the disc and wash it, then add butter. The turntable under the turntable should be flat to ensure that the turntable is placed smoothly to avoid deformation damage.
(4) Determine whether the instrument is inaccurateAlthough the four-wheel aligner has brought us a lot of convenience, it can’t fully trust the instrument, because the instrument also has aging, loose and problematic. The measurement data of the same car twice is probably not exactly the same. The magnitude of this change is also related to the suspension structure, the stability of the components and the deformation of the wheel. The instrument itself and the improper operation also have errors. Knowing whether the instrument is out of alignment, it is best to have a chassis, suspension and other vehicles with stable positioning parameters, and it is their own, because they know their own car changes. Regularly and frequently, the vehicle is used to measure the data of each full four-round measurement, and the degree of change of the instrument can be analyzed by observing the measurement data for multiple times. When the data changes more than 20′, you can suspect that the instrument is out of alignment (even if the instrument is not accurate, as long as we know the amount of change, it can be flexibly calculated for positioning). Another method is to measure with one or more new cars without problems. By observing the measured data, the degree of change of the instrument can be analyzed. When there is a big change, the manufacturer should be calibrated.