An apparatus for slicing fruit or other items is provided. The fan motor includes a fan motor and a thermally dissipating surface to which the fan motor is fixed. In this way, during subsequent VGA calibration the test signal from the DAC is known not by virtue of the DAC having a tight manufacturing tolerance but by virtue of the actual measurements of its outputs for given register inputs. The interpolation engine can generate a conformal interpolation function and interpolated input sets that map to a set of target output data.