These aligners use a variety of mechanical and electronic sensors mounted to the wheels. This equipment will most commonly be physically connected to a computer with hard wires. In some shops, they will take care of their equipment and can get good readings for a limited period when the equipment is new. However, the reality is that a majority of the shops will abuse and mishandle the equipment. The delicate sensors and electronics housed in the mechanisms mounted to the wheels will inevitable be dropped or mishandled. A simple trip over the cord can pull the devices from the wheel and drastically damage the readings from that sensor. If not repaired or calibrated, this sensor will always give improper readings. If a technician uses these readings, they will be adjusting your vehicle for the worse.
The main limitation of this equipment is that it can only measure data in 2 dimensions. Alignments may be done satisfactorily but isn’t exact.

OUR STATE OF THE ART 3D IMAGING WHEEL ALIGNER