Interpolating step motor system with reduction drive interface
AssigneeMesur-Matic Electronics Corporation
InventorHarold R. Newell
Life of this patent
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Abstract
Two step motors are interconnected so that the rotor or output shaft of one drives the stator or field structure of the other via a reduction drive assembly, so that the output shaft of the other motor may advance a load to an interpolated position between steps of the output shaft to which the load is directly connected. Anti-backlash means is associated with the reduction drive assembly which has a high reduction gear ratio to enable use of two motors both of which have large angle stepping angles.
Claims10
In combination with first and second step motors each having field and rotor elements and energizing means for simultaneously stepping both of the motors, means for effecting advancement of the rotor element of said first step to an interpolated position between steps, comprising reduction gear means drivingly connecting the rotor element of said second step motor to the field element of said first step motor for stepped advancement of the field element through steps smaller than the steps through which the rotor elements are advanced.
Dependencies are inferred from the claim text.