as described above the caliper is moveable in several directions which enable the angle of incidence of the select axis 24 to vary infinitely within a select range so that the select axis 24 can be aligned normal to the plane of the rotor 14 referring to fig1 arrow 72 illustrates how the caliper can be moved by translation toward and away from the rotor 14 this movement is also illustrated by the arrows 72 in fig5 this movement is possible by virtue of the elongate slots 66 the elongate slots 66 also enable canting of the caliper 12 relative to the rotor 14 as illustrated by arcuate arrow 74 in fig1 and also in fig6 finally the caliper can be pivoted about a virtual axis 76 such that the caliper is in essence hinged about the engaging concave and convex surfaces of the first and second washer pairs 36 38 this movement is illustrated by the arrow 78 in fig1 and 7 by virtue of the canting movement allowed by the elongate slots 66 and the hinged movement allowed by the engaging concave and convex surface of the first and second washer pairs 36 38 the select axis 24 can be moved relative to the plane of the rotor 14 to have an angle of incidence which.