Machine speed controller

Details Machine speed controller Machine speed controller

1979-10-05

1981-05-12

Dobeck, B.

Electricity: motive power systems

Positional servo systems

Program- or pattern-controlled systems

318 39, 318561, G05B 1924

Patent

active

042674956

ABSTRACT:
To initiate a scheduled speed change at the correct point in the operating cycle of a machine, a speed change command is subjected to a variable delay. Attaining the commanded speed level too early or too late in one cycle results in the speed change command being correspondingly delayed or advanced in the next cycle. In the preferred embodiment, a low point controller is designed to control the high-to-low speed transition in a multiple spindle bar or screw machine to achieve "feed" speed at the optimum point to decrease cycle time while avoiding damage to the cutting tools.

REFERENCES:
patent: 3975667 (1976-08-01), Bory et al.
patent: 4023084 (1977-05-01), Owa
patent: 4131837 (1978-12-01), Whetham

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