Patent ID: 7680555

Claim:
A method for performing a calibration routine in a three-dimensional modeling machine having a substrate and an extrusion head that includes a first extrusion tip and a second extrusion tip, the method comprising: biasing a plunger of a multi-axis sensor assembly operably against a plurality of electrical contacts of the multi-axis sensor assembly; generating a first material build profile on the substrate with the first extrusion tip; toggling the extrusion head such that the second extrusion tip is lower than the first extrusion tip; generating a second material build profile on the substrate with the second extrusion tip; contacting top surfaces of the first and second material build profiles with the plunger to move the plunger with respect to a housing of the multi-axis sensor assembly, wherein each movement of the plunger disengages the plunger from at least one of the plurality of electrical contacts; determining relative positions of the top surfaces of the first and second material build profiles in relation to a reference position based on the disengagement of the plunger from the at least one electrical contact; and determining a vertical tip-to-tip offset based on a difference between the relative positions of the top surfaces.