Drive controller and drive control method for a stepping motor w

Details Drive controller and drive control method for a stepping motor w Drive controller and drive control method for a stepping motor w

1992-05-21

1994-03-01

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With protective or reliability increasing features

318597, 318696, 318101, G05B 1126

Patent

active

052911110

ABSTRACT:
A drive controller for a stepping motor having a plurality of excitation phases which designate stepping positions thereof, includes a motor driver for sequentially exciting the excitation phases to rotate the stepping motor in increments of one step angle, and a control section for controlling the motor driver to set an excitation interval. When the control section sets the excitation interval to be shorter than an interval of a stepping range in which the stepping motor temporarily stops for each increment, the stepping motor is driven in a slewing mode in which the rotation of the stepping motor is continued without stopping for each increment. The control section includes a position correcting section for controlling the driving section prior to driving of the stepping motor in the slewing mode to sequentially excite the excitation phases for all the stepping positions of the stepping motor at the interval of the stepping range, with the final excitation phase being set as an excitation phase corresponding to a stepping position from which the rotation of the stepping motor may be started in the slewing mode, without a possibility of step out occuring.

REFERENCES:
patent: 4717866 (1988-01-01), Gray
patent: 4904917 (1990-01-01), Hakluytt
patent: 5059883 (1991-10-01), Takahashi

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