Boots – shoes – and leggings
Patent
1982-04-21
1985-07-02
Smith, Jerry
Boots, shoes, and leggings
364475, 408 63, 408130, 409100, G05B 1300
Patent
active
045272441
ABSTRACT:
An automated control system and method for control of hydraulically positionable machine tools is disclosed. A servo motor is coupled to a servo valve spool such that the angular displacement of the motor shaft directly corresponds to the resultant rotation of the spool, which in turn threadably engages a precision lead screw fixed to a tool slide. In the preferred embodiment, a position encoder provides signals indicative of the angular displacement of the motor shaft. The position encoder signals are fed back to an electronic central processor which controls motor operation. The controller is programmed with the lead screw pitch information, and a series of instructions to advance or reverse the spool along the lead screw in a series of movements precisely corresponding to the desired movements of the slide.
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Systems International, "Position Control"; Andrew Sills; Oct. 1981, pp. 51 and 52.
Blankenship Ronnie L.
Graham, Jr. Merrill E.
MacDonald Allen
Smith Jerry
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