Estimating Caster Using a Digital Camera
This is a method estimating the front end caster using a digital camera and using Windows Paint to estimate camber angles from the picture. Normally one would take 2 pictures from each wheel, one f...
Forum Discussion
Here is a 2007 Honda Civic EX, Honda Spec for Caster is +7.0 on each wheel.
It is crucial that the camera sit on a stand which is parallel to the ground surface. The ground surface must be flat BUT not necessarily level.
Steering wheel is full right.
Drivers side camber measures NEGATIVE 1.853
Passengers side camber measures POSITIVE 4.618
Drivers side turn measures 27 Degrees
Passengers side turn measures 28 Degrees
Estimated Caster K:
K = (180 / 3.14) * ((4.618 - (-1.853) / (27 - (-28) )
K = 57.32 * ( +6.471 / +55 ) = +6.7 Degrees
as opposed to specified + 7.0 degrees.
Note: Measured resolution of camber degrees based on pixel counts in the high resolution original JPG files. (and yes, pixels have been confirmed to be square :B)
It is crucial that the camera sit on a stand which is parallel to the ground surface. The ground surface must be flat BUT not necessarily level.
Steering wheel is full right.
Drivers side camber measures NEGATIVE 1.853
Passengers side camber measures POSITIVE 4.618
Drivers side turn measures 27 Degrees
Passengers side turn measures 28 Degrees
Estimated Caster K:
K = (180 / 3.14) * ((4.618 - (-1.853) / (27 - (-28) )
K = 57.32 * ( +6.471 / +55 ) = +6.7 Degrees
as opposed to specified + 7.0 degrees.
Note: Measured resolution of camber degrees based on pixel counts in the high resolution original JPG files. (and yes, pixels have been confirmed to be square :B)
