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Toe is usually adjustable in production automobiles, even though caster angle and camber angle are often not adjustable. Maintenance of front-end alignment, which used to involve all three adjustments, currently involves only setting the toe; in most cases, even for a car in which caster or camber are adjustable, only the toe will need ...
This was achieved by making the linkage not a simple parallelogram, but by making the length of the track rod (the moving link between the hubs) shorter than that of the axle, so that the steering arms of the hubs appeared to "toe out". As the steering moved, the wheels turned according to Ackermann, with the inner wheel turning further. [2]
It is the distance (in inches or millimeters) from the midpoint of the string line to the gauge of the reference rail. The design horizontal alignment for tangent track is zero (perfect straight line on the horizontal layout). The design horizontal alignment on the curved track in North America is 1 inch for each degree of curvature.
Caster angles over 7 degrees with radial tires are common. Power steering is usually necessary to overcome the jacking effect from the high caster angle. Some front-end alignment calls for different right-side and left-side caster. This is called cross caster, and the difference is called the spread.
There are usually four camera units in a wheel alignment system (a camera unit for each wheel). The camera units communicate their physical positioning with respect to other camera units to a central computer, which calculates and displays. [3] Often with alignment equipment, these "heads" can be a large precision reflector.
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It will then require a change in the tie rod length to be in proper alignment so the radius of the arc will change as well. If the radius arc of the tie rod is longer than stock on a front steer setup then the car will have more toe understeer. If the same scenario was applied to a rear steering design, then the car would exhibit less toe ...
These tools work to aid bone alignment. “Toe separators are designed to stretch and align the toes of the feet,” adds Emily Splichal, D.P.M. , a board-certified podiatrist.