I've been thinking about caster again too, specifically how do those big alignment machines know what the caster is? Especially on vehicles with lifts and different offset wheels (where the stock numbers programmed into the machine no longer apply). The post above shows how it can be calculated, but I don't recall the alignment staff turning the steering once they start making adjustments (usually the steering wheel is locked in the centre position). All they seem to have are those "reflectors" that they bolt onto each wheel. If I have changed:
1) the wheel offset (and the distance between opposite wheels), and
2) more importantly lifted the vehicle (my brain gets hot trying to figure out what impact this has on geometry, but I think it would reduce the distance between front and rear wheels assuming I had positive caster to start with),
how does it know what the caster is? Distance between front and rear wheels? Can anyone enlighten me please?
1) the wheel offset (and the distance between opposite wheels), and
2) more importantly lifted the vehicle (my brain gets hot trying to figure out what impact this has on geometry, but I think it would reduce the distance between front and rear wheels assuming I had positive caster to start with),
how does it know what the caster is? Distance between front and rear wheels? Can anyone enlighten me please?
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