Intercomp Alignment Gauge
Let's define "change." You must take the READING as you mentioned...........turn the wheel one way 20 degrees, zero the gauge, turn the wheel the other way 20 degrees and take the reading
The actual caster is being measured as if the wheel is straight.
So you can diddle adjustments any way you need to access them, but when you take the reading, you MUST repeat the procedure with the gauge. Also, don't forget to "jounce" the suspension to settle it.
Caster is actually a simple math formula that is taken off CAMBER. In other words the old school caster camber gauges were actually a camber guage, with what amounts to a slide rule built in. Below is my old Ammco. ALL IT DOES is to measure camber. That is all it "actually measures." That is the blue scale is mechanically linked to the bubble.
The bubble must be "at zero" if the gauge is up against a pure vertical surface....easy......it measures "plumb" at zero degrees. It quite simply measures degrees tilt in or out by tilting the bubble back to zero via the BLUE rotating scale
CAMBER IS ALL this gauge "actually measures." --that is directly. Caster is "figured" off the red scale. That is simply a free wheeling slide rule. You can get the same answer by reading the BLUE scale, which gives you camber change as the wheels are turned, and multiplying the change at that + / - wheel change of 20 degrees X 1.5. In other words the red scale is simply a multiplying slide rule
Let's define "change." You must take the READING as you mentioned...........turn the wheel one way 20 degrees, zero the gauge, turn the wheel the other way 20 degrees and take the reading
The actual caster is being measured as if the wheel is straight.
So you can diddle adjustments any way you need to access them, but when you take the reading, you MUST repeat the procedure with the gauge. Also, don't forget to "jounce" the suspension to settle it.
Caster is actually a simple math formula that is taken off CAMBER. In other words the old school caster camber gauges were actually a camber guage, with what amounts to a slide rule built in. Below is my old Ammco. ALL IT DOES is to measure camber. That is all it "actually measures." That is the blue scale is mechanically linked to the bubble.
The bubble must be "at zero" if the gauge is up against a pure vertical surface....easy......it measures "plumb" at zero degrees. It quite simply measures degrees tilt in or out by tilting the bubble back to zero via the BLUE rotating scale
CAMBER IS ALL this gauge "actually measures." --that is directly. Caster is "figured" off the red scale. That is simply a free wheeling slide rule. You can get the same answer by reading the BLUE scale, which gives you camber change as the wheels are turned, and multiplying the change at that + / - wheel change of 20 degrees X 1.5. In other words the red scale is simply a multiplying slide rule
