Patent ID: 7266051

Claim:
A method of calibrating a display hand in an electronic device, wherein the display hand conveys information on a display and is operatively coupled to a rotor of a stepping motor via one or more gears, the method comprising the steps of: initializing a counter; stepping the rotor of the stepping motor a number of steps in a first direction and incrementing the counter; determining whether the counter is less than a predefined value representing at least the total of (i) the maximum number of steps needed to rotate the display hand from an initial position on the display to a position such that the display hand would indicate the maximum value on the display; and (ii) the number of steps needed to rotate the display hand from the initial position on the display to the position such that a channel formed in one of the one or more gears would abut against a tab; and if so: stepping the rotor of the stepping motor a number of steps in the first direction, incrementing the counter and again determining whether the counter is less than the predefined value; and if not: rotating the rotor of the motor in a direction opposite the first direction the same number of steps needed from when the display hand would be at the initial position on the display to the position such that the channel would abut against the tab.