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Head and Zero Stop Adjustment Disclosure Number: IPCOM000063175D
Original Publication Date: 1985-Feb-01
Included in the Prior Art Database: 2005-Feb-18

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Janssen, DM Kirton, AJ [+details]


Fig. 1 is a schematic diagram of movable target block 10 driven by band 12 attached to stepper motor 11. The stepper motor can be adjusted by using the average of the target block positions rather than a single position. The stepper motor is adjusted so that when it is energized to each step position (x1, x2, x3,...xp), x, as defined by equation (2), it will satisfy its preassigned value. The average position of the target block is given by: (Image Omitted) where k is the nominal step displacement of the target block, p is the number of steps being averaged, xi the target block position for the ith step, and X the ideal position for i=1 (Fig. 2). Alternatively, the stepper motor could be adjusted to average the maximum and minimum position errors.