Electricity: motive power systems – Positional servo systems – With particular motor control system responsive to the...
Patent
1997-07-11
1998-06-23
Wysocki, Jonathan
Electricity: motive power systems
Positional servo systems
With particular motor control system responsive to the...
318439, H02P 700
Patent
active
057709378
ABSTRACT:
A stepping motor driving device which is capable of correcting a micro step moving angle during micro step driving. This stepping motor driving device includes a motor control portion for giving instruction as to a moving amount, a CPU for outputting the number of motor drive pulses according to a moving amount instructed by the motor control portion, a motor drive circuit for driving a motor according to the motor drive pulses and a memory for storing a pulse number showing an actual moving angle closest to an ideal moving angle as a correction pulse number corresponding to a micro step angle based on an error between an actual moving angle and the ideal moving amount with respect to each micro step angle within a full step angle. The CPU outputs pulses in the correction pulse number stored in the memory correspondingly to the micro step angle to the motor drive circuit in order to perform micro step driving by the micro step angle.
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Nozaki Hirotake
Tsuda Yutaka
Nikon Corporation
Wysocki Jonathan
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