Abstract: An apparatus is provided for guiding a vehicle onto a service lift having a pair of runways for receiving the wheels of the vehicle. In one embodiment, sensors attached to the runways generate sensor signals responsive to a position of the vehicle relative to the runways. The sensor signals are processed to determine and monitor the position of the vehicle relative to the runways, and a visual reference is displayed to guide an operator of the vehicle to drive the vehicle wheels onto the runways. In another embodiment, each runway includes a turntable for receiving the wheels. An actuator is connected to one runway and to its corresponding turntable, and is configured to move the turntable relative to the runway. The sensor signals are processed to determine the position of the vehicle relative to the runways, and to cause the actuator to align the turntable with the vehicle wheel.

Abstract: An apparatus is provided for guiding a vehicle onto a service lift having a pair of runways for receiving the wheels of the vehicle. In one embodiment, a machine vision wheel alignment system including an image sensor, a processor, and a display provides a visual display of the vehicle and the runways to guide an operator of the vehicle to drive the vehicle wheels onto the runways. In other embodiments, a pair of runway targets and a vehicle target are viewed by a pair of image sensors of a machine vision wheel alignment system. Image signals from the image sensors are processed to determine respective positions of the runways and to monitor a position of the vehicle relative to the runways, and a visual reference is displayed to guide an operator of the vehicle.

Abstract: An apparatus is provided for guiding a vehicle onto a service lift having a pair of runways for receiving the wheels of the vehicle. In one embodiment, a machine vision wheel alignment system including an image sensor, a processor, and a display provides a visual display of the vehicle and the runways to guide an operator of the vehicle to drive the vehicle wheels onto the runways. In other embodiments, a pair of runway targets and a vehicle target are viewed by a pair of image sensors of a machine vision wheel alignment system. Image signals from the image sensors are processed to determine respective positions of the runways and to monitor a position of the vehicle relative to the runways, and a visual reference is displayed to guide an operator of the vehicle.

Abstract: An apparatus is provided for guiding a vehicle onto a service lift having a pair of runways for receiving the wheels of the vehicle. In one embodiment, a light beam is directed toward the vehicle along the lift center line between the runways, to provide a visual reference to guide an operator of the vehicle to drive the vehicle wheels onto the runways. In another embodiment, cameras of a machine vision wheel alignment system provide a visual display of the vehicle and the runways. In other embodiments, runway and vehicle targets are viewed by image sensors of a machine vision wheel alignment system. Image signals from the image sensors are processed to determine respective positions of the runways and to monitor a position of the vehicle relative to the runways, and a visual reference is displayed to guide an operator of the vehicle.

Abstract: A method for measuring and aligning wheels of a vehicle using a machine vision alignment apparatus including optical scanning devices and optically scannable targets. The method includes prompting a user of the alignment apparatus to choose between a standard alignment and a two-wheel alignment, conducting a standard alignment if the user chooses a standard alignment, prompting the user to choose between two targets or four targets if the user chooses a two-wheel alignment, conducting a two-wheel, two-target alignment procedure using the optical scanning devices if the user chooses two targets, and conducting a two-wheel, four-target alignment procedure using the optical scanning devices if the user chooses four targets.

Abstract: An improved wheel alignment turntable for supporting a wheel of a vehicle. Embodiments include a turntable having a base, and a top plate for receiving the vehicle wheel, the top plate being mounted to an upper surface of the base for rotational and translational movement relative to the base. A pair of paddles, removably adjustably attachable to the base, engages a peripheral wall of the top plate for maintaining the top plate in a predetermined position relative to the base while the vehicle wheel is being positioned on the turntable. The paddles are easily removable when the wheel is supported on the turntable. A plurality of slide pads are removably mounted to a lower surface of the base, for enabling sliding motion between the turntable and a surface of a lift without damaging paint on the surface of the lift. The slide pads are stackable against one another for adjusting height of the turntable relative to the lift.

Abstract: A method for measuring and aligning front and rear wheels of a four wheel vehicle, including measuring alignment properties of the front wheels, and correcting alignment properties of the rear wheels if all of the measurements of the alignment properties of the front wheels are substantially equal to the manufacturer-specified alignment properties for the front wheels. If all of the measurements of the alignment properties of the front wheels are not substantially equal to the manufacturer-specified alignment properties for the front wheels, then the alignment properties of the front wheels are corrected prior to correcting alignment properties of the rear wheels. The measurements of the alignment properties can be made using a computer-aided, three-dimensional machine vision alignment apparatus.

Abstract: An improved wheel alignment turntable for supporting a wheel of a vehicle. Embodiments include a turntable having a base, and a top plate for receiving the vehicle wheel, the top plate being mounted to an upper surface of the base for rotational and translational movement relative to the base. A pair of paddles, removably adjustably attachable to the base, engages a peripheral wall of the top plate for maintaining the top plate in a predetermined position relative to the base while the vehicle wheel is being positioned on the turntable. The paddles are easily removable when the wheel is supported on the turntable. A plurality of slide pads are removably mounted to a lower surface of the base, for enabling sliding motion between the turntable and a surface of a lift without damaging paint on the surface of the lift. The slide pads are stackable against one another for adjusting height of the turntable relative to the lift.

Abstract: A method for measuring and aligning wheels of a vehicle using a machine vision alignment apparatus including optical scanning devices and optically scannable targets. The method includes prompting a user of the alignment apparatus to choose between a standard alignment and a two-wheel alignment, conducting a standard alignment if the user chooses a standard alignment, prompting the user to choose between two targets or four targets if the user chooses a two-wheel alignment, conducting a two-wheel, two-target alignment procedure using the optical scanning devices if the user chooses two targets, and conducting a two-wheel, four-target alignment procedure using the optical scanning devices if the user chooses four targets.

Abstract: A method for measuring and aligning front and rear wheels of a four wheel vehicle, including measuring alignment properties of the front wheels, and correcting alignment properties of the rear wheels if all of the measurements of the alignment properties of the front wheels are substantially equal to the manufacturer-specified alignment properties for the front wheels. If all of the measurements of the alignment properties of the front wheels are not substantially equal to the manufacturer-specified alignment properties for the front wheels, then the alignment properties of the front wheels are corrected prior to correcting alignment properties of the rear wheels. The measurements of the alignment properties can be made using a computer-aided, three-dimensional machine vision alignment apparatus.

Abstract: An apparatus and method for measuring a scrub radius of a wheel including determining at least one of a steering axis, a centerline and a ground plane of the wheel using computer-aided alignment, and determining the other of the steering axis, the centerline and the ground plane of the wheel not determined using computer-aided alignment. The method also includes determining an intersection between the steering axis and the ground plane of the wheel, determining an intersection between the centerline and the ground plane of the wheel, and determining a distance between the intersections, the distance being equal to the scrub radius of the wheel.

Abstract: An apparatus and method for measuring a scrub radius of a wheel including determining at least one of a steering axis, a centerline and a ground plane of the wheel using computer-aided alignment, and determining the other of the steering axis, the centerline and the ground plane of the wheel not determined using computer-aided alignment. The method also includes determining an intersection between the steering axis and the ground plane of the wheel, determining an intersection between the centerline and the ground plane of the wheel, and determining a distance between the intersections, the distance being equal to the scrub radius of the wheel.

Abstract: A computer-assisted method for adjusting alignment angles of a wheel attached to a wheel mounting structure of a vehicle. This method includes measuring a baseline wheel alignment angle with respect to a rim or hub of a wheel and using a computer for storing baseline wheel alignment angle data in a memory. A required change in the wheel alignment angle is determined from the baseline wheel alignment angle. Then, the wheel and rim are removed from the mounting structure and, using the computer, the baseline wheel alignment angle data is retrieved from the memory. Finally, a change in wheel alignment angle from the baseline wheel alignment angle is measured while adjusting the mounting structure. The change in wheel alignment angle data and the required change in the wheel alignment angle are compared.

Abstract: An adjustment tool is provided for performing vehicle suspension alignment procedures where it is necessary to adjust the space between suspension components. Embodiments include an expanding adjustment tool with a first arm and a second arm that pivots relative to the first arm, and an adjuster, such as a wedge, for moving the first and second arms relative to each other. Both arms have detachable tips, such as spreader plates, yokes, wedges, etc. of different sizes and shapes, which tips are easily interchangeable depending on the particular application. The adjuster is rotatable to adjust the relative positions of the arms, and has an end engagable with a standard ratchet, thereby allowing extensions, swivels, etc. to be connected to the adjuster as needed to facilitate the alignment procedure in tight spaces. Thus, a single adjusting tool easily performs adjustments on a wide variety of vehicles with minimal additional cost.

Abstract: A vehicle lift assembly prevents accidental slippage of a vehicle therefrom. The vehicle lift assembly comprises a plurality of vertically disposed posts and a runway slidably coupled to the plurality of vertical posts. A hoist system supplies the force necessary for elevating the runway along the plurality of posts. A sensor arrangement detects whether the runway has tilted beyond a predetermined angular displacement. A lift control circuit controls the hoist system to elevate the runway selectively in a prescribed direction, and suspends operation of the hoist system, when necessary, to prevent the vehicle from accidentally sliding off the runway.

Abstract: A system is disclosed for selecting a replacement adjustment member, and aligning a pair of steerable wheels of a vehicle having a twin I-beam suspension. The steerable wheels are each associated with a suspension angle adjustment member that identifies an offset value and a pair of orientation values. Sensors are provided for generating angular displacement values for each of the steerable wheels. Based on the angular displacement values, a replacement offset value and a pair of orientation adjustment values are determined for each of the steerable wheels. The replacement offset value and the orientation adjustment values are subsequently usable for selecting and installing an appropriate replacement adjustment member on the twin I-beam suspension.

Abstract: A clamping device for mounting an alignment head to the hub of a vehicle which comprises a frame; a shaft upon which the head is mountable connected to the frame; a first clamping member connected to the frame and comprising a first groove for engaging at least a first bolt of the hub; and a second clamping member movably connected to the frame and comprising a second groove for engaging at least a second bolt of the hub.