Double motor feed control system

Details Double motor feed control system Double motor feed control system

1988-07-21

1990-01-30

Shoop, Jr., William M.

Electricity: motive power systems

Positional servo systems

With particular 'error-detecting' means

318603, 318600, 318571, 318 46, G05B 106

Patent

active

048975885

ABSTRACT:
A double motor feed control system for controlling a relative linear feed motion between two objects, such as a rail and a table of a linear motion rolling contact bearing assembly. The double motor feed control system includes a first motor, a threaded feed shaft driven to rotate by the first motor, and a slider assembly threadably connected to the feed shaft. The slider assembly includes a nut which is fitted onto and in thread engagement with the feed shaft, an inner ring fixedly attached to the nut and provided with a rotor, and a motor housing rotatably supported on the rotor through a pair of ball bearings and provided with a stator in opposite arrangement with the rotor to thereby define a second motor. By controlling the direction of rotation of each of the first and second motors, the feed speed may be selectively set at a fast or slow speed.

REFERENCES:
patent: 3961232 (1976-06-01), Newell
patent: 4322669 (1982-03-01), Fukuma et al.
patent: 4401930 (1983-08-01), Kato et al.
patent: 4533859 (1985-08-01), Johnstone

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