Electro-hydraulic position control for a machine tool with actua

Details Electro-hydraulic position control for a machine tool with actua Electro-hydraulic position control for a machine tool with actua

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.

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